/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/weaver_parallel-lamport.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:24:59,269 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:24:59,344 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:24:59,348 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:24:59,348 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:24:59,349 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:24:59,349 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:24:59,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:24:59,376 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:24:59,379 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:24:59,380 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:24:59,380 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:24:59,381 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:24:59,382 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:24:59,382 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:24:59,382 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:24:59,382 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:24:59,382 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:24:59,383 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:24:59,383 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:24:59,383 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:24:59,383 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:24:59,384 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:24:59,384 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:24:59,385 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:24:59,385 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:24:59,385 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:24:59,386 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:24:59,386 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:24:59,386 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:24:59,387 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:24:59,387 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:24:59,387 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:24:59,387 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:24:59,388 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:24:59,388 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:24:59,388 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:24:59,388 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:24:59,388 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:24:59,389 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:24:59,389 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:24:59,389 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:24:59,596 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:24:59,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:24:59,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:24:59,620 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:24:59,620 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:24:59,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-lamport.wvr_bound2.c [2023-08-04 02:25:00,708 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:25:00,887 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:25:00,887 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-lamport.wvr_bound2.c [2023-08-04 02:25:00,894 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24a15aabc/083f1735e573457ebdbfc7ab47787035/FLAG15c0cae2c [2023-08-04 02:25:00,904 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24a15aabc/083f1735e573457ebdbfc7ab47787035 [2023-08-04 02:25:00,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:25:00,907 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:25:00,908 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:25:00,908 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:25:00,919 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:25:00,919 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:25:00" (1/1) ... [2023-08-04 02:25:00,920 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@454cc9d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:00, skipping insertion in model container [2023-08-04 02:25:00,920 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:25:00" (1/1) ... [2023-08-04 02:25:00,943 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:25:01,078 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-lamport.wvr_bound2.c[4453,4466] [2023-08-04 02:25:01,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:25:01,090 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:25:01,112 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-lamport.wvr_bound2.c[4453,4466] [2023-08-04 02:25:01,116 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:25:01,123 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:25:01,123 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:25:01,129 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:25:01,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01 WrapperNode [2023-08-04 02:25:01,129 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:25:01,130 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:25:01,130 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:25:01,130 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:25:01,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01" (1/1) ... [2023-08-04 02:25:01,144 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01" (1/1) ... [2023-08-04 02:25:01,169 INFO L138 Inliner]: procedures = 25, calls = 89, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 291 [2023-08-04 02:25:01,169 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:25:01,170 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:25:01,170 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:25:01,170 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:25:01,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01" (1/1) ... [2023-08-04 02:25:01,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01" (1/1) ... [2023-08-04 02:25:01,180 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01" (1/1) ... [2023-08-04 02:25:01,180 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01" (1/1) ... [2023-08-04 02:25:01,188 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01" (1/1) ... [2023-08-04 02:25:01,193 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01" (1/1) ... [2023-08-04 02:25:01,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01" (1/1) ... [2023-08-04 02:25:01,195 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01" (1/1) ... [2023-08-04 02:25:01,198 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:25:01,199 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:25:01,199 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:25:01,199 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:25:01,200 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01" (1/1) ... [2023-08-04 02:25:01,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:25:01,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:25:01,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 02:25:01,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 02:25:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:25:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:25:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:25:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:25:01,255 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:25:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:25:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:25:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:25:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:25:01,256 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:25:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:25:01,256 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 02:25:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 02:25:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:25:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:25:01,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:25:01,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:25:01,258 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 02:25:01,366 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:25:01,368 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:25:01,658 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:25:01,752 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:25:01,752 INFO L302 CfgBuilder]: Removed 7 assume(true) statements. [2023-08-04 02:25:01,754 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:25:01 BoogieIcfgContainer [2023-08-04 02:25:01,755 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:25:01,757 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:25:01,757 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:25:01,759 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:25:01,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:25:00" (1/3) ... [2023-08-04 02:25:01,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e02f544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:25:01, skipping insertion in model container [2023-08-04 02:25:01,760 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:25:01" (2/3) ... [2023-08-04 02:25:01,760 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e02f544 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:25:01, skipping insertion in model container [2023-08-04 02:25:01,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:25:01" (3/3) ... [2023-08-04 02:25:01,761 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-lamport.wvr_bound2.c [2023-08-04 02:25:01,768 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:25:01,776 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:25:01,776 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:25:01,776 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:25:01,829 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 02:25:01,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 228 transitions, 498 flow [2023-08-04 02:25:02,022 INFO L124 PetriNetUnfolderBase]: 88/683 cut-off events. [2023-08-04 02:25:02,022 INFO L125 PetriNetUnfolderBase]: For 36/38 co-relation queries the response was YES. [2023-08-04 02:25:02,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 683 events. 88/683 cut-off events. For 36/38 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3275 event pairs, 0 based on Foata normal form. 0/585 useless extension candidates. Maximal degree in co-relation 393. Up to 16 conditions per place. [2023-08-04 02:25:02,028 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 228 transitions, 498 flow [2023-08-04 02:25:02,037 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 172 transitions, 359 flow [2023-08-04 02:25:02,040 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:25:02,047 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 172 transitions, 359 flow [2023-08-04 02:25:02,049 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 172 transitions, 359 flow [2023-08-04 02:25:02,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 172 transitions, 359 flow [2023-08-04 02:25:02,084 INFO L124 PetriNetUnfolderBase]: 12/283 cut-off events. [2023-08-04 02:25:02,084 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:25:02,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308 conditions, 283 events. 12/283 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 685 event pairs, 0 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 228. Up to 8 conditions per place. [2023-08-04 02:25:02,091 INFO L119 LiptonReduction]: Number of co-enabled transitions 2116 [2023-08-04 02:25:07,296 INFO L134 LiptonReduction]: Checked pairs total: 9616 [2023-08-04 02:25:07,296 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-04 02:25:07,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:25:07,316 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;@7eeb2a9c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:25:07,316 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:25:07,320 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:25:07,320 INFO L124 PetriNetUnfolderBase]: 1/23 cut-off events. [2023-08-04 02:25:07,320 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:25:07,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:25:07,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:25:07,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:25:07,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:25:07,325 INFO L85 PathProgramCache]: Analyzing trace with hash -525206535, now seen corresponding path program 1 times [2023-08-04 02:25:07,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:25:07,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191780419] [2023-08-04 02:25:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:25:07,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:25:07,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:25:07,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 02:25:07,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:25:07,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191780419] [2023-08-04 02:25:07,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191780419] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:25:07,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:25:07,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:25:07,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489579353] [2023-08-04 02:25:07,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:25:07,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:25:07,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:25:07,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:25:07,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:25:07,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 383 [2023-08-04 02:25:07,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:07,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:25:07,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 383 [2023-08-04 02:25:07,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:25:07,777 INFO L124 PetriNetUnfolderBase]: 710/1288 cut-off events. [2023-08-04 02:25:07,778 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-04 02:25:07,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2590 conditions, 1288 events. 710/1288 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7143 event pairs, 354 based on Foata normal form. 0/1199 useless extension candidates. Maximal degree in co-relation 2561. Up to 1138 conditions per place. [2023-08-04 02:25:07,787 INFO L140 encePairwiseOnDemand]: 380/383 looper letters, 29 selfloop transitions, 2 changer transitions 0/44 dead transitions. [2023-08-04 02:25:07,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 165 flow [2023-08-04 02:25:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:25:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:25:07,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 596 transitions. [2023-08-04 02:25:07,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5187119234116623 [2023-08-04 02:25:07,801 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 596 transitions. [2023-08-04 02:25:07,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 596 transitions. [2023-08-04 02:25:07,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:25:07,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 596 transitions. [2023-08-04 02:25:07,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:07,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 383.0) internal successors, (1532), 4 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:07,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 383.0) internal successors, (1532), 4 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:07,816 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 91 flow. Second operand 3 states and 596 transitions. [2023-08-04 02:25:07,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 165 flow [2023-08-04 02:25:07,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 44 transitions, 165 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:25:07,820 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 99 flow [2023-08-04 02:25:07,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=383, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2023-08-04 02:25:07,824 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 02:25:07,824 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 99 flow [2023-08-04 02:25:07,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:07,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:25:07,825 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 02:25:07,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:25:07,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:25:07,826 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:25:07,826 INFO L85 PathProgramCache]: Analyzing trace with hash -502500180, now seen corresponding path program 1 times [2023-08-04 02:25:07,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:25:07,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344523501] [2023-08-04 02:25:07,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:25:07,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:25:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:25:08,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 02:25:08,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:25:08,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344523501] [2023-08-04 02:25:08,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344523501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:25:08,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:25:08,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:25:08,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634426605] [2023-08-04 02:25:08,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:25:08,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:25:08,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:25:08,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:25:08,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:25:08,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 383 [2023-08-04 02:25:08,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 38 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:08,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:25:08,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 383 [2023-08-04 02:25:08,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:25:08,512 INFO L124 PetriNetUnfolderBase]: 710/1262 cut-off events. [2023-08-04 02:25:08,513 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2023-08-04 02:25:08,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2550 conditions, 1262 events. 710/1262 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6590 event pairs, 709 based on Foata normal form. 1/1191 useless extension candidates. Maximal degree in co-relation 2524. Up to 1146 conditions per place. [2023-08-04 02:25:08,520 INFO L140 encePairwiseOnDemand]: 380/383 looper letters, 24 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2023-08-04 02:25:08,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 39 transitions, 153 flow [2023-08-04 02:25:08,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:25:08,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:25:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 588 transitions. [2023-08-04 02:25:08,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117493472584856 [2023-08-04 02:25:08,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 588 transitions. [2023-08-04 02:25:08,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 588 transitions. [2023-08-04 02:25:08,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:25:08,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 588 transitions. [2023-08-04 02:25:08,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.0) internal successors, (588), 3 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:08,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 383.0) internal successors, (1532), 4 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:08,531 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 383.0) internal successors, (1532), 4 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:08,533 INFO L175 Difference]: Start difference. First operand has 47 places, 38 transitions, 99 flow. Second operand 3 states and 588 transitions. [2023-08-04 02:25:08,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 39 transitions, 153 flow [2023-08-04 02:25:08,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 39 transitions, 149 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:25:08,538 INFO L231 Difference]: Finished difference. Result has 48 places, 39 transitions, 107 flow [2023-08-04 02:25:08,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=383, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=48, PETRI_TRANSITIONS=39} [2023-08-04 02:25:08,539 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-04 02:25:08,539 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 39 transitions, 107 flow [2023-08-04 02:25:08,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:08,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:25:08,539 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:25:08,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 02:25:08,539 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:25:08,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:25:08,540 INFO L85 PathProgramCache]: Analyzing trace with hash 42018084, now seen corresponding path program 1 times [2023-08-04 02:25:08,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:25:08,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322192718] [2023-08-04 02:25:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:25:08,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:25:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:25:08,566 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:25:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:25:08,601 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:25:08,601 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:25:08,602 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:25:08,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:25:08,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:25:08,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 02:25:08,604 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 02:25:08,606 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:25:08,607 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:25:08,607 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:25:08,633 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 02:25:08,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 269 transitions, 628 flow [2023-08-04 02:25:09,172 INFO L124 PetriNetUnfolderBase]: 840/4112 cut-off events. [2023-08-04 02:25:09,173 INFO L125 PetriNetUnfolderBase]: For 602/608 co-relation queries the response was YES. [2023-08-04 02:25:09,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 4112 events. 840/4112 cut-off events. For 602/608 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 33391 event pairs, 11 based on Foata normal form. 0/3516 useless extension candidates. Maximal degree in co-relation 2441. Up to 192 conditions per place. [2023-08-04 02:25:09,183 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 269 transitions, 628 flow [2023-08-04 02:25:09,187 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 204 transitions, 444 flow [2023-08-04 02:25:09,187 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:25:09,187 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 204 transitions, 444 flow [2023-08-04 02:25:09,188 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 204 transitions, 444 flow [2023-08-04 02:25:09,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 204 transitions, 444 flow [2023-08-04 02:25:09,259 INFO L124 PetriNetUnfolderBase]: 18/651 cut-off events. [2023-08-04 02:25:09,260 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 02:25:09,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 651 events. 18/651 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3016 event pairs, 0 based on Foata normal form. 0/621 useless extension candidates. Maximal degree in co-relation 553. Up to 27 conditions per place. [2023-08-04 02:25:09,274 INFO L119 LiptonReduction]: Number of co-enabled transitions 6116 [2023-08-04 02:25:14,642 INFO L134 LiptonReduction]: Checked pairs total: 44750 [2023-08-04 02:25:14,643 INFO L136 LiptonReduction]: Total number of compositions: 157 [2023-08-04 02:25:14,645 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:25:14,646 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;@7eeb2a9c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:25:14,646 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 02:25:14,651 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:25:14,651 INFO L124 PetriNetUnfolderBase]: 1/64 cut-off events. [2023-08-04 02:25:14,651 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 02:25:14,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:25:14,652 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:25:14,652 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:25:14,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:25:14,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1746040718, now seen corresponding path program 1 times [2023-08-04 02:25:14,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:25:14,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328762129] [2023-08-04 02:25:14,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:25:14,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:25:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:25:14,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:25:14,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:25:14,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328762129] [2023-08-04 02:25:14,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328762129] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:25:14,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:25:14,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:25:14,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784019557] [2023-08-04 02:25:14,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:25:14,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:25:14,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:25:14,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:25:14,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:25:14,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 426 [2023-08-04 02:25:14,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 68 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:14,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:25:14,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 426 [2023-08-04 02:25:14,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:25:44,973 INFO L124 PetriNetUnfolderBase]: 312160/406318 cut-off events. [2023-08-04 02:25:44,973 INFO L125 PetriNetUnfolderBase]: For 24450/24450 co-relation queries the response was YES. [2023-08-04 02:25:45,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 824957 conditions, 406318 events. 312160/406318 cut-off events. For 24450/24450 co-relation queries the response was YES. Maximal size of possible extension queue 12357. Compared 2954464 event pairs, 312154 based on Foata normal form. 0/400653 useless extension candidates. Maximal degree in co-relation 598359. Up to 391704 conditions per place. [2023-08-04 02:25:47,301 INFO L140 encePairwiseOnDemand]: 423/426 looper letters, 47 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-04 02:25:47,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 75 transitions, 284 flow [2023-08-04 02:25:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:25:47,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:25:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 668 transitions. [2023-08-04 02:25:47,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226917057902973 [2023-08-04 02:25:47,304 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 668 transitions. [2023-08-04 02:25:47,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 668 transitions. [2023-08-04 02:25:47,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:25:47,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 668 transitions. [2023-08-04 02:25:47,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.66666666666666) internal successors, (668), 3 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:47,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:47,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:47,310 INFO L175 Difference]: Start difference. First operand has 80 places, 68 transitions, 172 flow. Second operand 3 states and 668 transitions. [2023-08-04 02:25:47,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 75 transitions, 284 flow [2023-08-04 02:25:47,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 278 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 02:25:47,526 INFO L231 Difference]: Finished difference. Result has 83 places, 69 transitions, 178 flow [2023-08-04 02:25:47,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=83, PETRI_TRANSITIONS=69} [2023-08-04 02:25:47,529 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 3 predicate places. [2023-08-04 02:25:47,530 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 69 transitions, 178 flow [2023-08-04 02:25:47,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:47,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:25:47,531 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:25:47,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-04 02:25:47,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:25:47,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:25:47,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1855481481, now seen corresponding path program 1 times [2023-08-04 02:25:47,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:25:47,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573413877] [2023-08-04 02:25:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:25:47,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:25:47,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:25:47,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:25:47,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:25:47,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573413877] [2023-08-04 02:25:47,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573413877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:25:47,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696449386] [2023-08-04 02:25:47,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:25:47,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:25:47,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:25:47,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:25:47,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 02:25:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:25:47,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:25:47,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:25:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:25:47,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:25:47,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696449386] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:25:47,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:25:47,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:25:47,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561117290] [2023-08-04 02:25:47,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:25:47,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:25:47,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:25:47,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:25:47,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:25:47,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 426 [2023-08-04 02:25:47,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 69 transitions, 178 flow. Second operand has 5 states, 5 states have (on average 206.8) internal successors, (1034), 5 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:25:47,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:25:47,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 426 [2023-08-04 02:25:47,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:26:17,194 INFO L124 PetriNetUnfolderBase]: 312100/409867 cut-off events. [2023-08-04 02:26:17,194 INFO L125 PetriNetUnfolderBase]: For 23246/23246 co-relation queries the response was YES. [2023-08-04 02:26:18,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 829071 conditions, 409867 events. 312100/409867 cut-off events. For 23246/23246 co-relation queries the response was YES. Maximal size of possible extension queue 12505. Compared 3053378 event pairs, 189119 based on Foata normal form. 36/405184 useless extension candidates. Maximal degree in co-relation 829012. Up to 391517 conditions per place. [2023-08-04 02:26:19,767 INFO L140 encePairwiseOnDemand]: 422/426 looper letters, 56 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-04 02:26:19,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 85 transitions, 330 flow [2023-08-04 02:26:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:26:19,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:26:19,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1086 transitions. [2023-08-04 02:26:19,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098591549295775 [2023-08-04 02:26:19,774 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1086 transitions. [2023-08-04 02:26:19,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1086 transitions. [2023-08-04 02:26:19,775 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:26:19,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1086 transitions. [2023-08-04 02:26:19,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 217.2) internal successors, (1086), 5 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:19,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:19,782 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:19,782 INFO L175 Difference]: Start difference. First operand has 83 places, 69 transitions, 178 flow. Second operand 5 states and 1086 transitions. [2023-08-04 02:26:19,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 85 transitions, 330 flow [2023-08-04 02:26:19,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 85 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 02:26:19,785 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 192 flow [2023-08-04 02:26:19,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2023-08-04 02:26:19,786 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 6 predicate places. [2023-08-04 02:26:19,786 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 192 flow [2023-08-04 02:26:19,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.8) internal successors, (1034), 5 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:19,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:19,787 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:26:19,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 02:26:19,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:19,991 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:26:19,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:19,992 INFO L85 PathProgramCache]: Analyzing trace with hash -882826404, now seen corresponding path program 1 times [2023-08-04 02:26:19,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:19,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205165661] [2023-08-04 02:26:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:19,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:20,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 02:26:20,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:20,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205165661] [2023-08-04 02:26:20,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205165661] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:26:20,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160159575] [2023-08-04 02:26:20,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:20,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:20,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:26:20,052 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:26:20,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 02:26:20,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:20,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 02:26:20,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:26:20,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:26:20,148 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:26:20,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160159575] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:26:20,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:26:20,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 02:26:20,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282263834] [2023-08-04 02:26:20,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:26:20,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:26:20,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:20,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:26:20,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:26:20,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 426 [2023-08-04 02:26:20,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:20,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:20,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 426 [2023-08-04 02:26:20,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:26:48,848 INFO L124 PetriNetUnfolderBase]: 307797/402418 cut-off events. [2023-08-04 02:26:48,848 INFO L125 PetriNetUnfolderBase]: For 22991/22991 co-relation queries the response was YES. [2023-08-04 02:26:50,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816206 conditions, 402418 events. 307797/402418 cut-off events. For 22991/22991 co-relation queries the response was YES. Maximal size of possible extension queue 12311. Compared 2984392 event pairs, 219124 based on Foata normal form. 0/399461 useless extension candidates. Maximal degree in co-relation 714441. Up to 384735 conditions per place. [2023-08-04 02:26:51,584 INFO L140 encePairwiseOnDemand]: 423/426 looper letters, 58 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2023-08-04 02:26:51,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 86 transitions, 348 flow [2023-08-04 02:26:51,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:26:51,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:26:51,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 678 transitions. [2023-08-04 02:26:51,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5305164319248826 [2023-08-04 02:26:51,586 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 678 transitions. [2023-08-04 02:26:51,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 678 transitions. [2023-08-04 02:26:51,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:26:51,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 678 transitions. [2023-08-04 02:26:51,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:51,590 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:51,591 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 426.0) internal successors, (1704), 4 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:51,591 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 192 flow. Second operand 3 states and 678 transitions. [2023-08-04 02:26:51,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 86 transitions, 348 flow [2023-08-04 02:26:51,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 341 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 02:26:51,609 INFO L231 Difference]: Finished difference. Result has 87 places, 70 transitions, 200 flow [2023-08-04 02:26:51,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=87, PETRI_TRANSITIONS=70} [2023-08-04 02:26:51,612 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 7 predicate places. [2023-08-04 02:26:51,612 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 70 transitions, 200 flow [2023-08-04 02:26:51,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.33333333333334) internal successors, (628), 3 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:51,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:26:51,613 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:26:51,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 02:26:51,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-04 02:26:51,813 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:26:51,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:26:51,814 INFO L85 PathProgramCache]: Analyzing trace with hash -842023967, now seen corresponding path program 1 times [2023-08-04 02:26:51,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:26:51,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686543637] [2023-08-04 02:26:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:51,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:26:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:51,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:26:51,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:26:51,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686543637] [2023-08-04 02:26:51,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686543637] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:26:51,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609095683] [2023-08-04 02:26:51,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:26:51,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:26:51,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:26:51,865 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:26:51,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 02:26:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:26:51,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:26:51,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:26:51,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:26:51,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:26:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:26:51,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609095683] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:26:51,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:26:51,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:26:51,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834782215] [2023-08-04 02:26:51,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:26:51,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:26:51,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:26:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:26:51,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:26:52,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 426 [2023-08-04 02:26:52,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 70 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 207.8) internal successors, (1039), 5 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:26:52,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:26:52,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 426 [2023-08-04 02:26:52,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:27:16,988 INFO L124 PetriNetUnfolderBase]: 271769/349745 cut-off events. [2023-08-04 02:27:16,989 INFO L125 PetriNetUnfolderBase]: For 23222/23222 co-relation queries the response was YES. [2023-08-04 02:27:18,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715403 conditions, 349745 events. 271769/349745 cut-off events. For 23222/23222 co-relation queries the response was YES. Maximal size of possible extension queue 11376. Compared 2459486 event pairs, 216203 based on Foata normal form. 6/346074 useless extension candidates. Maximal degree in co-relation 592346. Up to 338367 conditions per place. [2023-08-04 02:27:19,192 INFO L140 encePairwiseOnDemand]: 423/426 looper letters, 57 selfloop transitions, 3 changer transitions 0/85 dead transitions. [2023-08-04 02:27:19,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 85 transitions, 345 flow [2023-08-04 02:27:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:27:19,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:27:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 880 transitions. [2023-08-04 02:27:19,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164319248826291 [2023-08-04 02:27:19,195 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 880 transitions. [2023-08-04 02:27:19,195 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 880 transitions. [2023-08-04 02:27:19,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:27:19,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 880 transitions. [2023-08-04 02:27:19,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:19,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:19,202 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:19,202 INFO L175 Difference]: Start difference. First operand has 87 places, 70 transitions, 200 flow. Second operand 4 states and 880 transitions. [2023-08-04 02:27:19,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 85 transitions, 345 flow [2023-08-04 02:27:19,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 85 transitions, 343 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 02:27:19,205 INFO L231 Difference]: Finished difference. Result has 89 places, 69 transitions, 195 flow [2023-08-04 02:27:19,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=89, PETRI_TRANSITIONS=69} [2023-08-04 02:27:19,206 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 9 predicate places. [2023-08-04 02:27:19,206 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 69 transitions, 195 flow [2023-08-04 02:27:19,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.8) internal successors, (1039), 5 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:19,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:27:19,207 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:27:19,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 02:27:19,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:27:19,417 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:27:19,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:27:19,417 INFO L85 PathProgramCache]: Analyzing trace with hash 995335886, now seen corresponding path program 1 times [2023-08-04 02:27:19,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:27:19,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829265505] [2023-08-04 02:27:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:27:19,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:27:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:27:19,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:27:19,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:27:19,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829265505] [2023-08-04 02:27:19,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829265505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:27:19,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282344747] [2023-08-04 02:27:19,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:27:19,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:27:19,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:27:19,477 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:27:19,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 02:27:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:27:19,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 02:27:19,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:27:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 02:27:19,597 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 02:27:19,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282344747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:27:19,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 02:27:19,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 02:27:19,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862192781] [2023-08-04 02:27:19,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:27:19,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:27:19,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:27:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:27:19,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 02:27:19,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 426 [2023-08-04 02:27:19,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 69 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 207.8) internal successors, (1039), 5 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:19,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:27:19,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 426 [2023-08-04 02:27:19,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:27:46,334 INFO L124 PetriNetUnfolderBase]: 267449/347350 cut-off events. [2023-08-04 02:27:46,335 INFO L125 PetriNetUnfolderBase]: For 17773/17773 co-relation queries the response was YES. [2023-08-04 02:27:47,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 711431 conditions, 347350 events. 267449/347350 cut-off events. For 17773/17773 co-relation queries the response was YES. Maximal size of possible extension queue 11265. Compared 2568604 event pairs, 60328 based on Foata normal form. 1296/346761 useless extension candidates. Maximal degree in co-relation 589105. Up to 325836 conditions per place. [2023-08-04 02:27:48,645 INFO L140 encePairwiseOnDemand]: 422/426 looper letters, 87 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2023-08-04 02:27:48,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 115 transitions, 469 flow [2023-08-04 02:27:48,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 02:27:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 02:27:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1116 transitions. [2023-08-04 02:27:48,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523943661971831 [2023-08-04 02:27:48,648 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1116 transitions. [2023-08-04 02:27:48,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1116 transitions. [2023-08-04 02:27:48,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:27:48,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1116 transitions. [2023-08-04 02:27:48,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 223.2) internal successors, (1116), 5 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:48,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:48,655 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 426.0) internal successors, (2556), 6 states have internal predecessors, (2556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:48,655 INFO L175 Difference]: Start difference. First operand has 89 places, 69 transitions, 195 flow. Second operand 5 states and 1116 transitions. [2023-08-04 02:27:48,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 115 transitions, 469 flow [2023-08-04 02:27:48,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 115 transitions, 462 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:27:48,666 INFO L231 Difference]: Finished difference. Result has 90 places, 69 transitions, 205 flow [2023-08-04 02:27:48,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=205, PETRI_PLACES=90, PETRI_TRANSITIONS=69} [2023-08-04 02:27:48,674 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 10 predicate places. [2023-08-04 02:27:48,674 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 69 transitions, 205 flow [2023-08-04 02:27:48,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 207.8) internal successors, (1039), 5 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:48,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:27:48,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:27:48,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 02:27:48,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:27:48,881 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:27:48,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:27:48,881 INFO L85 PathProgramCache]: Analyzing trace with hash -155603074, now seen corresponding path program 1 times [2023-08-04 02:27:48,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:27:48,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406334174] [2023-08-04 02:27:48,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:27:48,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:27:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:27:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 02:27:48,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:27:48,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406334174] [2023-08-04 02:27:48,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406334174] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 02:27:48,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202761837] [2023-08-04 02:27:48,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:27:48,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:27:48,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:27:48,957 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 02:27:48,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 02:27:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:27:49,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 02:27:49,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 02:27:49,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 02:27:49,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 02:27:49,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 02:27:49,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202761837] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 02:27:49,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 02:27:49,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 02:27:49,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702046015] [2023-08-04 02:27:49,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 02:27:49,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 02:27:49,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:27:49,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 02:27:49,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 02:27:49,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 426 [2023-08-04 02:27:49,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 69 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 208.6) internal successors, (1043), 5 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:27:49,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:27:49,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 426 [2023-08-04 02:27:49,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:28:11,124 INFO L124 PetriNetUnfolderBase]: 236885/302678 cut-off events. [2023-08-04 02:28:11,125 INFO L125 PetriNetUnfolderBase]: For 28892/28892 co-relation queries the response was YES. [2023-08-04 02:28:12,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624129 conditions, 302678 events. 236885/302678 cut-off events. For 28892/28892 co-relation queries the response was YES. Maximal size of possible extension queue 10755. Compared 2076916 event pairs, 176638 based on Foata normal form. 216/302231 useless extension candidates. Maximal degree in co-relation 516845. Up to 286611 conditions per place. [2023-08-04 02:28:13,080 INFO L140 encePairwiseOnDemand]: 423/426 looper letters, 77 selfloop transitions, 3 changer transitions 0/104 dead transitions. [2023-08-04 02:28:13,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 104 transitions, 431 flow [2023-08-04 02:28:13,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:28:13,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:28:13,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 900 transitions. [2023-08-04 02:28:13,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.528169014084507 [2023-08-04 02:28:13,083 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 900 transitions. [2023-08-04 02:28:13,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 900 transitions. [2023-08-04 02:28:13,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:28:13,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 900 transitions. [2023-08-04 02:28:13,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:13,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:13,088 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:13,088 INFO L175 Difference]: Start difference. First operand has 90 places, 69 transitions, 205 flow. Second operand 4 states and 900 transitions. [2023-08-04 02:28:13,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 104 transitions, 431 flow [2023-08-04 02:28:13,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 104 transitions, 426 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 02:28:13,093 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 198 flow [2023-08-04 02:28:13,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2023-08-04 02:28:13,094 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 11 predicate places. [2023-08-04 02:28:13,094 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 198 flow [2023-08-04 02:28:13,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 208.6) internal successors, (1043), 5 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:13,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:28:13,095 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:28:13,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 02:28:13,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 02:28:13,300 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 02:28:13,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:28:13,301 INFO L85 PathProgramCache]: Analyzing trace with hash -442945100, now seen corresponding path program 1 times [2023-08-04 02:28:13,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:28:13,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416327687] [2023-08-04 02:28:13,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:13,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:28:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 02:28:13,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:28:13,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416327687] [2023-08-04 02:28:13,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416327687] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:28:13,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:28:13,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 02:28:13,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197902077] [2023-08-04 02:28:13,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:28:13,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 02:28:13,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:28:13,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 02:28:13,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 02:28:13,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 426 [2023-08-04 02:28:13,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:13,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:28:13,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 426 [2023-08-04 02:28:13,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:28:25,190 INFO L124 PetriNetUnfolderBase]: 136661/179900 cut-off events. [2023-08-04 02:28:25,190 INFO L125 PetriNetUnfolderBase]: For 18674/18674 co-relation queries the response was YES. [2023-08-04 02:28:25,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378879 conditions, 179900 events. 136661/179900 cut-off events. For 18674/18674 co-relation queries the response was YES. Maximal size of possible extension queue 6773. Compared 1270061 event pairs, 9220 based on Foata normal form. 20736/198913 useless extension candidates. Maximal degree in co-relation 313623. Up to 131760 conditions per place. [2023-08-04 02:28:25,755 INFO L140 encePairwiseOnDemand]: 424/426 looper letters, 0 selfloop transitions, 0 changer transitions 110/110 dead transitions. [2023-08-04 02:28:25,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 454 flow [2023-08-04 02:28:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 02:28:25,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 02:28:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 910 transitions. [2023-08-04 02:28:25,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534037558685446 [2023-08-04 02:28:25,758 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 910 transitions. [2023-08-04 02:28:25,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 910 transitions. [2023-08-04 02:28:25,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:28:25,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 910 transitions. [2023-08-04 02:28:25,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 227.5) internal successors, (910), 4 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:25,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:25,763 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 426.0) internal successors, (2130), 5 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:25,763 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 198 flow. Second operand 4 states and 910 transitions. [2023-08-04 02:28:25,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 454 flow [2023-08-04 02:28:31,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 110 transitions, 447 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 02:28:31,370 INFO L231 Difference]: Finished difference. Result has 89 places, 0 transitions, 0 flow [2023-08-04 02:28:31,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=426, PETRI_DIFFERENCE_MINUEND_FLOW=187, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=89, PETRI_TRANSITIONS=0} [2023-08-04 02:28:31,370 INFO L281 CegarLoopForPetriNet]: 80 programPoint places, 9 predicate places. [2023-08-04 02:28:31,371 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 0 transitions, 0 flow [2023-08-04 02:28:31,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:31,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 02:28:31,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 02:28:31,371 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 02:28:31,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 02:28:31,372 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:28:31,372 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 02:28:31,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 269 transitions, 628 flow [2023-08-04 02:28:31,730 INFO L124 PetriNetUnfolderBase]: 840/4112 cut-off events. [2023-08-04 02:28:31,730 INFO L125 PetriNetUnfolderBase]: For 602/608 co-relation queries the response was YES. [2023-08-04 02:28:31,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4786 conditions, 4112 events. 840/4112 cut-off events. For 602/608 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 33391 event pairs, 11 based on Foata normal form. 0/3516 useless extension candidates. Maximal degree in co-relation 2441. Up to 192 conditions per place. [2023-08-04 02:28:31,744 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 269 transitions, 628 flow [2023-08-04 02:28:31,754 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 238 places, 256 transitions, 590 flow [2023-08-04 02:28:31,754 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:28:31,754 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 238 places, 256 transitions, 590 flow [2023-08-04 02:28:31,755 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 238 places, 256 transitions, 590 flow [2023-08-04 02:28:31,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 238 places, 256 transitions, 590 flow [2023-08-04 02:28:32,147 INFO L124 PetriNetUnfolderBase]: 840/3459 cut-off events. [2023-08-04 02:28:32,147 INFO L125 PetriNetUnfolderBase]: For 589/592 co-relation queries the response was YES. [2023-08-04 02:28:32,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4107 conditions, 3459 events. 840/3459 cut-off events. For 589/592 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 26114 event pairs, 11 based on Foata normal form. 0/2927 useless extension candidates. Maximal degree in co-relation 2100. Up to 192 conditions per place. [2023-08-04 02:28:32,190 INFO L119 LiptonReduction]: Number of co-enabled transitions 11888 [2023-08-04 02:28:37,037 INFO L134 LiptonReduction]: Checked pairs total: 99231 [2023-08-04 02:28:37,037 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-04 02:28:37,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 02:28:37,040 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;@7eeb2a9c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:28:37,040 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 02:28:37,044 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:28:37,044 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2023-08-04 02:28:37,044 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 02:28:37,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:28:37,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 02:28:37,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 02:28:37,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:28:37,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1035453441, now seen corresponding path program 1 times [2023-08-04 02:28:37,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:28:37,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296225066] [2023-08-04 02:28:37,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:28:37,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:28:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:28:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 02:28:37,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:28:37,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296225066] [2023-08-04 02:28:37,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296225066] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:28:37,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:28:37,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 02:28:37,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112694550] [2023-08-04 02:28:37,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:28:37,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:28:37,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:28:37,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:28:37,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:28:37,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 460 [2023-08-04 02:28:37,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 97 transitions, 272 flow. Second operand has 3 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 02:28:37,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:28:37,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 460 [2023-08-04 02:28:37,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand