/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_rfi006_power.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:55:58,162 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:55:58,229 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:55:58,235 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:55:58,236 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:55:58,236 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:55:58,237 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:55:58,273 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:55:58,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:55:58,277 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:55:58,277 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:55:58,277 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:55:58,278 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:55:58,279 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:55:58,279 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:55:58,279 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:55:58,280 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:55:58,280 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:55:58,280 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:55:58,280 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:55:58,280 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:55:58,281 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:55:58,281 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:55:58,281 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:55:58,281 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:55:58,281 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:55:58,282 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:55:58,282 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:55:58,282 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:55:58,283 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:55:58,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:55:58,284 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:55:58,284 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:55:58,284 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:55:58,284 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:55:58,284 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:55:58,284 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:55:58,285 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:55:58,285 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:55:58,285 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:55:58,285 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:55:58,285 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:55:58,513 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:55:58,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:55:58,543 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:55:58,544 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:55:58,544 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:55:58,545 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi006_power.opt_bound2.i [2023-08-03 23:55:59,770 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:56:00,005 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:56:00,005 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi006_power.opt_bound2.i [2023-08-03 23:56:00,026 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d762c0c9/ce26c76efb7241c68cfae7c0e60edcd2/FLAG224cc2bb9 [2023-08-03 23:56:00,043 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d762c0c9/ce26c76efb7241c68cfae7c0e60edcd2 [2023-08-03 23:56:00,047 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:56:00,048 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:56:00,049 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:56:00,049 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:56:00,054 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:56:00,055 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,056 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7562a912 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00, skipping insertion in model container [2023-08-03 23:56:00,056 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,101 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:56:00,273 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_rfi006_power.opt_bound2.i[993,1006] [2023-08-03 23:56:00,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:56:00,470 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:56:00,482 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_rfi006_power.opt_bound2.i[993,1006] [2023-08-03 23:56:00,493 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 23:56:00,495 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-03 23:56:00,559 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:56:00,580 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:56:00,581 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:56:00,586 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:56:00,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00 WrapperNode [2023-08-03 23:56:00,586 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:56:00,587 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:56:00,587 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:56:00,587 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:56:00,592 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,608 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,631 INFO L138 Inliner]: procedures = 176, calls = 75, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 202 [2023-08-03 23:56:00,632 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:56:00,632 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:56:00,632 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:56:00,632 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:56:00,640 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,640 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,645 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,664 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,668 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,671 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,673 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,698 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:56:00,699 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:56:00,699 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:56:00,699 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:56:00,700 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00" (1/1) ... [2023-08-03 23:56:00,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:56:00,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:56:00,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 23:56:00,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 23:56:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 23:56:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:56:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:56:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:56:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:56:00,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:56:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:56:00,781 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:56:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:56:00,781 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:56:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:56:00,781 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:56:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:56:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:56:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:56:00,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:56:00,784 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:56:00,952 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:56:00,954 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:56:01,302 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:56:01,603 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:56:01,603 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:56:01,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:56:01 BoogieIcfgContainer [2023-08-03 23:56:01,606 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:56:01,608 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:56:01,608 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:56:01,611 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:56:01,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:56:00" (1/3) ... [2023-08-03 23:56:01,614 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ced6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:56:01, skipping insertion in model container [2023-08-03 23:56:01,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:00" (2/3) ... [2023-08-03 23:56:01,614 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ced6fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:56:01, skipping insertion in model container [2023-08-03 23:56:01,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:56:01" (3/3) ... [2023-08-03 23:56:01,615 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_rfi006_power.opt_bound2.i [2023-08-03 23:56:01,622 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:56:01,631 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:56:01,631 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:56:01,631 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:56:01,698 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:56:01,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 23:56:01,909 INFO L124 PetriNetUnfolderBase]: 30/465 cut-off events. [2023-08-03 23:56:01,910 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:56:01,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 490 conditions, 465 events. 30/465 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1959 event pairs, 0 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-03 23:56:01,920 INFO L82 GeneralOperation]: Start removeDead. Operand has 148 places, 146 transitions, 307 flow [2023-08-03 23:56:01,926 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 117 transitions, 249 flow [2023-08-03 23:56:01,928 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:56:01,941 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-03 23:56:01,944 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 117 transitions, 249 flow [2023-08-03 23:56:01,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 117 transitions, 249 flow [2023-08-03 23:56:01,979 INFO L124 PetriNetUnfolderBase]: 6/233 cut-off events. [2023-08-03 23:56:01,979 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:56:01,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 233 events. 6/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 629 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2023-08-03 23:56:01,984 INFO L119 LiptonReduction]: Number of co-enabled transitions 1236 [2023-08-03 23:56:08,143 INFO L134 LiptonReduction]: Checked pairs total: 3358 [2023-08-03 23:56:08,143 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-03 23:56:08,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:56:08,161 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;@165c755b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:56:08,161 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:56:08,167 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:56:08,167 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-03 23:56:08,167 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:56:08,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:56:08,168 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:56:08,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:56:08,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:56:08,173 INFO L85 PathProgramCache]: Analyzing trace with hash 232878706, now seen corresponding path program 1 times [2023-08-03 23:56:08,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:56:08,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495151282] [2023-08-03 23:56:08,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:08,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:56:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:56:08,294 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:56:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:56:08,340 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:56:08,341 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:56:08,342 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:56:08,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:56:08,344 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:56:08,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:56:08,345 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 23:56:08,347 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:56:08,348 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:56:08,348 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:56:08,406 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:56:08,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 169 transitions, 374 flow [2023-08-03 23:56:08,602 INFO L124 PetriNetUnfolderBase]: 93/1392 cut-off events. [2023-08-03 23:56:08,603 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:56:08,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1392 events. 93/1392 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9443 event pairs, 0 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 1015. Up to 54 conditions per place. [2023-08-03 23:56:08,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 169 transitions, 374 flow [2023-08-03 23:56:08,616 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 140 transitions, 316 flow [2023-08-03 23:56:08,616 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:56:08,616 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 140 transitions, 316 flow [2023-08-03 23:56:08,617 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 140 transitions, 316 flow [2023-08-03 23:56:08,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 140 transitions, 316 flow [2023-08-03 23:56:08,684 INFO L124 PetriNetUnfolderBase]: 12/609 cut-off events. [2023-08-03 23:56:08,685 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:56:08,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 609 events. 12/609 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2980 event pairs, 0 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 493. Up to 27 conditions per place. [2023-08-03 23:56:08,696 INFO L119 LiptonReduction]: Number of co-enabled transitions 3388 [2023-08-03 23:56:15,812 INFO L134 LiptonReduction]: Checked pairs total: 10484 [2023-08-03 23:56:15,813 INFO L136 LiptonReduction]: Total number of compositions: 105 [2023-08-03 23:56:15,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:56:15,815 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;@165c755b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:56:15,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:56:15,824 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:56:15,824 INFO L124 PetriNetUnfolderBase]: 0/60 cut-off events. [2023-08-03 23:56:15,824 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 23:56:15,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:56:15,825 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:56:15,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:56:15,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:56:15,825 INFO L85 PathProgramCache]: Analyzing trace with hash -448479288, now seen corresponding path program 1 times [2023-08-03 23:56:15,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:56:15,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706715771] [2023-08-03 23:56:15,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:15,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:56:15,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:56:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:56:15,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:56:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706715771] [2023-08-03 23:56:15,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706715771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:56:15,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:56:15,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:56:15,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598208887] [2023-08-03 23:56:15,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:56:15,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:56:15,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:56:16,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:56:16,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:56:16,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 274 [2023-08-03 23:56:16,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 120 flow. Second operand has 3 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) [2023-08-03 23:56:16,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:56:16,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 274 [2023-08-03 23:56:16,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:56:28,283 INFO L124 PetriNetUnfolderBase]: 55520/75396 cut-off events. [2023-08-03 23:56:28,283 INFO L125 PetriNetUnfolderBase]: For 4446/4446 co-relation queries the response was YES. [2023-08-03 23:56:28,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152459 conditions, 75396 events. 55520/75396 cut-off events. For 4446/4446 co-relation queries the response was YES. Maximal size of possible extension queue 2547. Compared 491343 event pairs, 44754 based on Foata normal form. 0/68945 useless extension candidates. Maximal degree in co-relation 43636. Up to 71670 conditions per place. [2023-08-03 23:56:28,874 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 34 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2023-08-03 23:56:28,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 200 flow [2023-08-03 23:56:28,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:56:28,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:56:28,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 460 transitions. [2023-08-03 23:56:28,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559610705596107 [2023-08-03 23:56:28,892 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 460 transitions. [2023-08-03 23:56:28,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 460 transitions. [2023-08-03 23:56:28,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:56:28,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 460 transitions. [2023-08-03 23:56:28,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.33333333333334) internal successors, (460), 3 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:28,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:28,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:28,912 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 120 flow. Second operand 3 states and 460 transitions. [2023-08-03 23:56:28,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 200 flow [2023-08-03 23:56:28,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 194 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:56:28,930 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 126 flow [2023-08-03 23:56:28,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-08-03 23:56:28,938 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-03 23:56:28,940 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 126 flow [2023-08-03 23:56:28,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-08-03 23:56:28,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:56:28,945 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:56:28,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:56:28,946 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:56:28,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:56:28,949 INFO L85 PathProgramCache]: Analyzing trace with hash 902798711, now seen corresponding path program 1 times [2023-08-03 23:56:28,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:56:28,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907036428] [2023-08-03 23:56:28,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:56:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:56:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:56:29,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:56:29,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907036428] [2023-08-03 23:56:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907036428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:56:29,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:56:29,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 23:56:29,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149671928] [2023-08-03 23:56:29,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:56:29,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:56:29,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:56:29,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:56:29,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:56:29,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 274 [2023-08-03 23:56:29,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:29,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:56:29,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 274 [2023-08-03 23:56:29,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:56:40,748 INFO L124 PetriNetUnfolderBase]: 55508/75357 cut-off events. [2023-08-03 23:56:40,748 INFO L125 PetriNetUnfolderBase]: For 3987/3987 co-relation queries the response was YES. [2023-08-03 23:56:40,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151967 conditions, 75357 events. 55508/75357 cut-off events. For 3987/3987 co-relation queries the response was YES. Maximal size of possible extension queue 2549. Compared 494321 event pairs, 36684 based on Foata normal form. 9/68933 useless extension candidates. Maximal degree in co-relation 54231. Up to 71623 conditions per place. [2023-08-03 23:56:41,268 INFO L140 encePairwiseOnDemand]: 270/274 looper letters, 37 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2023-08-03 23:56:41,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 50 transitions, 222 flow [2023-08-03 23:56:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:56:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:56:41,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 742 transitions. [2023-08-03 23:56:41,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416058394160584 [2023-08-03 23:56:41,275 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 742 transitions. [2023-08-03 23:56:41,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 742 transitions. [2023-08-03 23:56:41,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:56:41,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 742 transitions. [2023-08-03 23:56:41,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:41,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:41,281 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:41,281 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 126 flow. Second operand 5 states and 742 transitions. [2023-08-03 23:56:41,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 50 transitions, 222 flow [2023-08-03 23:56:41,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 50 transitions, 219 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:56:41,284 INFO L231 Difference]: Finished difference. Result has 61 places, 43 transitions, 140 flow [2023-08-03 23:56:41,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=61, PETRI_TRANSITIONS=43} [2023-08-03 23:56:41,286 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-08-03 23:56:41,286 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 43 transitions, 140 flow [2023-08-03 23:56:41,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:41,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:56:41,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:56:41,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:56:41,287 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:56:41,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:56:41,288 INFO L85 PathProgramCache]: Analyzing trace with hash 881215632, now seen corresponding path program 1 times [2023-08-03 23:56:41,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:56:41,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071779003] [2023-08-03 23:56:41,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:41,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:56:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:56:41,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:56:41,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:56:41,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071779003] [2023-08-03 23:56:41,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071779003] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:56:41,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916873828] [2023-08-03 23:56:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:41,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:56:41,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:56:41,391 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:56:41,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:56:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:56:41,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:56:41,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:56:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:56:41,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:56:41,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916873828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:56:41,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:56:41,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:56:41,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512673738] [2023-08-03 23:56:41,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:56:41,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:56:41,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:56:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:56:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:56:41,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 274 [2023-08-03 23:56:41,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 43 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:41,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:56:41,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 274 [2023-08-03 23:56:41,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:56:51,577 INFO L124 PetriNetUnfolderBase]: 53886/71928 cut-off events. [2023-08-03 23:56:51,577 INFO L125 PetriNetUnfolderBase]: For 3706/3706 co-relation queries the response was YES. [2023-08-03 23:56:51,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146571 conditions, 71928 events. 53886/71928 cut-off events. For 3706/3706 co-relation queries the response was YES. Maximal size of possible extension queue 2477. Compared 452900 event pairs, 42318 based on Foata normal form. 0/66107 useless extension candidates. Maximal degree in co-relation 42000. Up to 69144 conditions per place. [2023-08-03 23:56:52,266 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 40 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-03 23:56:52,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 244 flow [2023-08-03 23:56:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:56:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:56:52,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-03 23:56:52,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656934306569343 [2023-08-03 23:56:52,269 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-03 23:56:52,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-03 23:56:52,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:56:52,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-03 23:56:52,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:52,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:52,272 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:52,273 INFO L175 Difference]: Start difference. First operand has 61 places, 43 transitions, 140 flow. Second operand 3 states and 465 transitions. [2023-08-03 23:56:52,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 244 flow [2023-08-03 23:56:52,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 52 transitions, 237 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:56:52,275 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 148 flow [2023-08-03 23:56:52,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-08-03 23:56:52,275 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-08-03 23:56:52,276 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 148 flow [2023-08-03 23:56:52,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:52,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:56:52,276 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:56:52,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:56:52,485 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 [2023-08-03 23:56:52,486 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:56:52,486 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:56:52,486 INFO L85 PathProgramCache]: Analyzing trace with hash -986170302, now seen corresponding path program 1 times [2023-08-03 23:56:52,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:56:52,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394704467] [2023-08-03 23:56:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:52,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:56:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:56:52,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:56:52,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:56:52,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394704467] [2023-08-03 23:56:52,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394704467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:56:52,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645791830] [2023-08-03 23:56:52,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:52,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:56:52,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:56:52,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:56:52,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:56:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:56:52,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:56:52,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:56:52,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:56:52,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:56:52,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:56:52,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645791830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:56:52,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:56:52,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-03 23:56:52,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565235523] [2023-08-03 23:56:52,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:56:52,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:56:52,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:56:52,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:56:52,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 23:56:52,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 274 [2023-08-03 23:56:52,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:52,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:56:52,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 274 [2023-08-03 23:56:52,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:00,603 INFO L124 PetriNetUnfolderBase]: 42343/55736 cut-off events. [2023-08-03 23:57:00,604 INFO L125 PetriNetUnfolderBase]: For 3168/3168 co-relation queries the response was YES. [2023-08-03 23:57:00,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114054 conditions, 55736 events. 42343/55736 cut-off events. For 3168/3168 co-relation queries the response was YES. Maximal size of possible extension queue 2046. Compared 329858 event pairs, 26937 based on Foata normal form. 3/51445 useless extension candidates. Maximal degree in co-relation 40563. Up to 53881 conditions per place. [2023-08-03 23:57:00,919 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 38 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-03 23:57:00,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 50 transitions, 237 flow [2023-08-03 23:57:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:57:00,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:57:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 601 transitions. [2023-08-03 23:57:00,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483576642335767 [2023-08-03 23:57:00,923 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 601 transitions. [2023-08-03 23:57:00,923 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 601 transitions. [2023-08-03 23:57:00,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:00,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 601 transitions. [2023-08-03 23:57:00,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:00,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:00,927 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:00,927 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 148 flow. Second operand 4 states and 601 transitions. [2023-08-03 23:57:00,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 50 transitions, 237 flow [2023-08-03 23:57:00,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 50 transitions, 235 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:57:00,929 INFO L231 Difference]: Finished difference. Result has 64 places, 43 transitions, 143 flow [2023-08-03 23:57:00,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2023-08-03 23:57:00,930 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-03 23:57:00,930 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 143 flow [2023-08-03 23:57:00,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.25) internal successors, (569), 4 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:00,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:00,931 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:00,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:57:01,136 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 [2023-08-03 23:57:01,136 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:01,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:01,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1693440169, now seen corresponding path program 1 times [2023-08-03 23:57:01,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:01,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797466416] [2023-08-03 23:57:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:01,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:01,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:57:01,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:01,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797466416] [2023-08-03 23:57:01,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797466416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:57:01,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969500119] [2023-08-03 23:57:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:01,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:01,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:01,241 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:57:01,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:57:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:01,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:57:01,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:57:01,389 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:57:01,389 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:57:01,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969500119] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:01,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:57:01,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:57:01,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396032278] [2023-08-03 23:57:01,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:01,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:57:01,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:57:01,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:57:01,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 274 [2023-08-03 23:57:01,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:01,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:01,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 274 [2023-08-03 23:57:01,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:09,211 INFO L124 PetriNetUnfolderBase]: 41935/55441 cut-off events. [2023-08-03 23:57:09,211 INFO L125 PetriNetUnfolderBase]: For 2671/2671 co-relation queries the response was YES. [2023-08-03 23:57:09,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113337 conditions, 55441 events. 41935/55441 cut-off events. For 2671/2671 co-relation queries the response was YES. Maximal size of possible extension queue 2060. Compared 333490 event pairs, 11542 based on Foata normal form. 144/51255 useless extension candidates. Maximal degree in co-relation 40290. Up to 52515 conditions per place. [2023-08-03 23:57:09,552 INFO L140 encePairwiseOnDemand]: 270/274 looper letters, 53 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2023-08-03 23:57:09,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 301 flow [2023-08-03 23:57:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:57:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:57:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 757 transitions. [2023-08-03 23:57:09,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525547445255474 [2023-08-03 23:57:09,554 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 757 transitions. [2023-08-03 23:57:09,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 757 transitions. [2023-08-03 23:57:09,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:09,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 757 transitions. [2023-08-03 23:57:09,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:09,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:09,560 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 274.0) internal successors, (1644), 6 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:09,560 INFO L175 Difference]: Start difference. First operand has 64 places, 43 transitions, 143 flow. Second operand 5 states and 757 transitions. [2023-08-03 23:57:09,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 301 flow [2023-08-03 23:57:09,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 294 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:57:09,563 INFO L231 Difference]: Finished difference. Result has 65 places, 43 transitions, 153 flow [2023-08-03 23:57:09,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=65, PETRI_TRANSITIONS=43} [2023-08-03 23:57:09,564 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2023-08-03 23:57:09,564 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 43 transitions, 153 flow [2023-08-03 23:57:09,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:09,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:09,564 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:09,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 23:57:09,773 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 [2023-08-03 23:57:09,773 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:09,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:09,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1152670875, now seen corresponding path program 1 times [2023-08-03 23:57:09,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:09,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116570882] [2023-08-03 23:57:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:09,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:57:09,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:09,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116570882] [2023-08-03 23:57:09,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116570882] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:57:09,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598316209] [2023-08-03 23:57:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:09,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:09,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:09,826 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:57:09,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:57:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:09,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:57:09,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:57:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:57:10,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:57:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:57:10,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598316209] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:57:10,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:57:10,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:57:10,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949442126] [2023-08-03 23:57:10,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:57:10,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:57:10,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:10,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:57:10,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:57:10,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 274 [2023-08-03 23:57:10,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 43 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:10,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:10,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 274 [2023-08-03 23:57:10,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:16,427 INFO L124 PetriNetUnfolderBase]: 35056/45970 cut-off events. [2023-08-03 23:57:16,428 INFO L125 PetriNetUnfolderBase]: For 3061/3061 co-relation queries the response was YES. [2023-08-03 23:57:16,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94473 conditions, 45970 events. 35056/45970 cut-off events. For 3061/3061 co-relation queries the response was YES. Maximal size of possible extension queue 1980. Compared 267056 event pairs, 21142 based on Foata normal form. 36/42540 useless extension candidates. Maximal degree in co-relation 33515. Up to 43492 conditions per place. [2023-08-03 23:57:16,709 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 49 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-03 23:57:16,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 60 transitions, 287 flow [2023-08-03 23:57:16,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:57:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:57:16,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 612 transitions. [2023-08-03 23:57:16,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583941605839416 [2023-08-03 23:57:16,712 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 612 transitions. [2023-08-03 23:57:16,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 612 transitions. [2023-08-03 23:57:16,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:16,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 612 transitions. [2023-08-03 23:57:16,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:16,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:16,715 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:16,715 INFO L175 Difference]: Start difference. First operand has 65 places, 43 transitions, 153 flow. Second operand 4 states and 612 transitions. [2023-08-03 23:57:16,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 60 transitions, 287 flow [2023-08-03 23:57:16,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 60 transitions, 282 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:57:16,718 INFO L231 Difference]: Finished difference. Result has 66 places, 42 transitions, 146 flow [2023-08-03 23:57:16,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=66, PETRI_TRANSITIONS=42} [2023-08-03 23:57:16,718 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-03 23:57:16,719 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 42 transitions, 146 flow [2023-08-03 23:57:16,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:16,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:16,719 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:16,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 23:57:16,924 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 [2023-08-03 23:57:16,925 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:57:16,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:16,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1546657748, now seen corresponding path program 1 times [2023-08-03 23:57:16,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:16,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593828011] [2023-08-03 23:57:16,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:16,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:16,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:57:16,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:16,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593828011] [2023-08-03 23:57:16,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593828011] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:16,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:57:16,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 23:57:16,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000257567] [2023-08-03 23:57:16,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:16,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:57:16,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:16,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:57:17,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 23:57:17,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 274 [2023-08-03 23:57:17,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 42 transitions, 146 flow. Second operand has 4 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) [2023-08-03 23:57:17,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:17,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 274 [2023-08-03 23:57:17,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:20,985 INFO L124 PetriNetUnfolderBase]: 19096/25735 cut-off events. [2023-08-03 23:57:20,985 INFO L125 PetriNetUnfolderBase]: For 2314/2314 co-relation queries the response was YES. [2023-08-03 23:57:21,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53994 conditions, 25735 events. 19096/25735 cut-off events. For 2314/2314 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 144606 event pairs, 952 based on Foata normal form. 3600/27309 useless extension candidates. Maximal degree in co-relation 19222. Up to 20016 conditions per place. [2023-08-03 23:57:21,047 INFO L140 encePairwiseOnDemand]: 272/274 looper letters, 0 selfloop transitions, 0 changer transitions 65/65 dead transitions. [2023-08-03 23:57:21,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 65 transitions, 306 flow [2023-08-03 23:57:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:57:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:57:21,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2023-08-03 23:57:21,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666058394160584 [2023-08-03 23:57:21,049 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2023-08-03 23:57:21,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2023-08-03 23:57:21,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:21,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2023-08-03 23:57:21,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:21,052 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:21,052 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:21,052 INFO L175 Difference]: Start difference. First operand has 66 places, 42 transitions, 146 flow. Second operand 4 states and 621 transitions. [2023-08-03 23:57:21,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 65 transitions, 306 flow [2023-08-03 23:57:21,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 299 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:57:21,157 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-03 23:57:21,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-03 23:57:21,158 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-03 23:57:21,158 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-03 23:57:21,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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) [2023-08-03 23:57:21,159 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:57:21,159 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:57:21,159 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:57:21,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 23:57:21,159 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:21,160 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:57:21,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 177 places, 169 transitions, 374 flow [2023-08-03 23:57:21,276 INFO L124 PetriNetUnfolderBase]: 93/1392 cut-off events. [2023-08-03 23:57:21,276 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:57:21,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1490 conditions, 1392 events. 93/1392 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9443 event pairs, 0 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 1015. Up to 54 conditions per place. [2023-08-03 23:57:21,280 INFO L82 GeneralOperation]: Start removeDead. Operand has 177 places, 169 transitions, 374 flow [2023-08-03 23:57:21,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 167 transitions, 362 flow [2023-08-03 23:57:21,283 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:57:21,283 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 175 places, 167 transitions, 362 flow [2023-08-03 23:57:21,283 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 175 places, 167 transitions, 362 flow [2023-08-03 23:57:21,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 167 transitions, 362 flow [2023-08-03 23:57:21,395 INFO L124 PetriNetUnfolderBase]: 93/1388 cut-off events. [2023-08-03 23:57:21,396 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-03 23:57:21,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1478 conditions, 1388 events. 93/1388 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9398 event pairs, 0 based on Foata normal form. 0/1211 useless extension candidates. Maximal degree in co-relation 1003. Up to 54 conditions per place. [2023-08-03 23:57:21,424 INFO L119 LiptonReduction]: Number of co-enabled transitions 5632 [2023-08-03 23:57:29,518 INFO L134 LiptonReduction]: Checked pairs total: 15498 [2023-08-03 23:57:29,518 INFO L136 LiptonReduction]: Total number of compositions: 138 [2023-08-03 23:57:29,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:57:29,520 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;@165c755b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:57:29,520 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:57:29,523 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:57:29,523 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-03 23:57:29,524 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-03 23:57:29,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:29,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:57:29,524 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:57:29,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:29,524 INFO L85 PathProgramCache]: Analyzing trace with hash 213203444, now seen corresponding path program 1 times [2023-08-03 23:57:29,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:29,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672376522] [2023-08-03 23:57:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:29,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:57:29,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:29,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672376522] [2023-08-03 23:57:29,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672376522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:29,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:57:29,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:57:29,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113849993] [2023-08-03 23:57:29,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:29,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:57:29,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:29,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:57:29,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:57:29,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 307 [2023-08-03 23:57:29,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 45 transitions, 118 flow. Second operand has 3 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) [2023-08-03 23:57:29,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:29,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 307 [2023-08-03 23:57:29,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:06,188 INFO L124 PetriNetUnfolderBase]: 206750/266343 cut-off events. [2023-08-03 23:58:06,189 INFO L125 PetriNetUnfolderBase]: For 4953/4953 co-relation queries the response was YES. [2023-08-03 23:58:06,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534818 conditions, 266343 events. 206750/266343 cut-off events. For 4953/4953 co-relation queries the response was YES. Maximal size of possible extension queue 7226. Compared 1697307 event pairs, 169944 based on Foata normal form. 0/230597 useless extension candidates. Maximal degree in co-relation 153729. Up to 261960 conditions per place. [2023-08-03 23:58:07,685 INFO L140 encePairwiseOnDemand]: 304/307 looper letters, 39 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-03 23:58:07,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 49 transitions, 208 flow [2023-08-03 23:58:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:58:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:58:07,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-03 23:58:07,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.504885993485342 [2023-08-03 23:58:07,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-03 23:58:07,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-03 23:58:07,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:07,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-03 23:58:07,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:07,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:07,690 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:07,690 INFO L175 Difference]: Start difference. First operand has 58 places, 45 transitions, 118 flow. Second operand 3 states and 465 transitions. [2023-08-03 23:58:07,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 49 transitions, 208 flow [2023-08-03 23:58:07,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 206 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 23:58:07,697 INFO L231 Difference]: Finished difference. Result has 61 places, 46 transitions, 128 flow [2023-08-03 23:58:07,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2023-08-03 23:58:07,698 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-03 23:58:07,698 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 128 flow [2023-08-03 23:58:07,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-08-03 23:58:07,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:07,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:07,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 23:58:07,699 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:58:07,699 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:07,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2046454117, now seen corresponding path program 1 times [2023-08-03 23:58:07,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:07,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951019116] [2023-08-03 23:58:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:07,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:07,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:58:07,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951019116] [2023-08-03 23:58:07,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951019116] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:58:07,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432705110] [2023-08-03 23:58:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:07,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:07,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:58:07,737 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:58:07,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:58:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:07,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:58:07,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:58:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:58:07,867 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:58:07,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432705110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:58:07,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:58:07,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:58:07,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595635768] [2023-08-03 23:58:07,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:58:07,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:58:07,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:07,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:58:07,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:58:07,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 307 [2023-08-03 23:58:07,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:07,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:58:07,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 307 [2023-08-03 23:58:07,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:43,197 INFO L124 PetriNetUnfolderBase]: 200318/255920 cut-off events. [2023-08-03 23:58:43,198 INFO L125 PetriNetUnfolderBase]: For 3435/3435 co-relation queries the response was YES. [2023-08-03 23:58:43,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514357 conditions, 255920 events. 200318/255920 cut-off events. For 3435/3435 co-relation queries the response was YES. Maximal size of possible extension queue 7215. Compared 1609154 event pairs, 160850 based on Foata normal form. 0/221827 useless extension candidates. Maximal degree in co-relation 514320. Up to 252785 conditions per place. [2023-08-03 23:58:44,862 INFO L140 encePairwiseOnDemand]: 304/307 looper letters, 45 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-03 23:58:44,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 240 flow [2023-08-03 23:58:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:58:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:58:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-03 23:58:44,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.510314875135722 [2023-08-03 23:58:44,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-03 23:58:44,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-03 23:58:44,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:44,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-03 23:58:44,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:44,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:44,867 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 307.0) internal successors, (1228), 4 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:44,867 INFO L175 Difference]: Start difference. First operand has 61 places, 46 transitions, 128 flow. Second operand 3 states and 470 transitions. [2023-08-03 23:58:44,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 240 flow [2023-08-03 23:58:44,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:58:44,868 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 138 flow [2023-08-03 23:58:44,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=307, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2023-08-03 23:58:44,869 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 5 predicate places. [2023-08-03 23:58:44,869 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 138 flow [2023-08-03 23:58:44,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:44,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:44,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:44,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 23:58:45,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-03 23:58:45,076 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:58:45,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash -372950461, now seen corresponding path program 1 times [2023-08-03 23:58:45,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:45,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601818585] [2023-08-03 23:58:45,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:45,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:45,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:58:45,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:45,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601818585] [2023-08-03 23:58:45,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601818585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:58:45,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644043480] [2023-08-03 23:58:45,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:45,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:45,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:58:45,124 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:58:45,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:58:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:45,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:58:45,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:58:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 23:58:45,271 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:58:45,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644043480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:58:45,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:58:45,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:58:45,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830576633] [2023-08-03 23:58:45,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:58:45,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:58:45,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:45,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:58:45,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:58:45,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 307 [2023-08-03 23:58:45,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:45,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:58:45,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 307 [2023-08-03 23:58:45,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand