/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix015.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:16:40,909 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:16:40,961 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:16:40,966 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:16:40,966 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:16:40,966 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:16:40,967 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:16:40,985 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:16:40,985 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:16:40,986 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:16:40,986 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:16:40,986 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:16:40,987 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:16:40,987 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:16:40,988 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:16:40,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:16:40,988 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:16:40,989 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:16:40,989 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:16:40,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:16:40,989 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:16:40,990 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:16:40,990 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:16:40,991 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:16:40,991 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:16:40,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:16:40,992 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:16:40,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:16:40,992 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:16:40,993 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:16:40,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:16:40,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:16:40,994 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:16:40,994 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:16:40,994 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:16:40,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:16:40,995 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:16:40,995 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:16:40,995 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:16:40,995 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:16:40,996 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:16:40,996 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:16:41,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:16:41,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:16:41,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:16:41,218 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:16:41,219 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:16:41,220 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix015.opt_bound2.i [2023-08-03 23:16:42,406 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:16:42,620 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:16:42,621 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix015.opt_bound2.i [2023-08-03 23:16:42,636 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33c4cc54e/08bd88873a074606999c6a5966538046/FLAGd1b84e1f2 [2023-08-03 23:16:42,648 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33c4cc54e/08bd88873a074606999c6a5966538046 [2023-08-03 23:16:42,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:16:42,652 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:16:42,653 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:16:42,653 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:16:42,656 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:16:42,657 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:16:42" (1/1) ... [2023-08-03 23:16:42,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eff9d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:42, skipping insertion in model container [2023-08-03 23:16:42,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:16:42" (1/1) ... [2023-08-03 23:16:42,707 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:16:42,837 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix015.opt_bound2.i[944,957] [2023-08-03 23:16:43,050 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:16:43,064 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:16:43,075 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix015.opt_bound2.i[944,957] [2023-08-03 23:16:43,092 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:16:43,094 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:16:43,155 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:16:43,189 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:16:43,189 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:16:43,195 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:16:43,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43 WrapperNode [2023-08-03 23:16:43,198 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:16:43,199 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:16:43,199 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:16:43,199 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:16:43,205 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43" (1/1) ... [2023-08-03 23:16:43,238 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43" (1/1) ... [2023-08-03 23:16:43,262 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 176 [2023-08-03 23:16:43,263 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:16:43,263 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:16:43,263 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:16:43,263 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:16:43,275 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43" (1/1) ... [2023-08-03 23:16:43,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43" (1/1) ... [2023-08-03 23:16:43,290 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43" (1/1) ... [2023-08-03 23:16:43,290 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43" (1/1) ... [2023-08-03 23:16:43,298 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43" (1/1) ... [2023-08-03 23:16:43,302 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43" (1/1) ... [2023-08-03 23:16:43,304 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43" (1/1) ... [2023-08-03 23:16:43,305 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43" (1/1) ... [2023-08-03 23:16:43,309 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:16:43,309 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:16:43,310 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:16:43,310 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:16:43,310 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43" (1/1) ... [2023-08-03 23:16:43,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:16:43,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:16:43,344 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 23:16:43,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 23:16:43,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:16:43,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:16:43,376 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:16:43,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:16:43,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:16:43,378 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:16:43,379 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:16:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:16:43,379 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:16:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:16:43,379 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:16:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:16:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:16:43,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:16:43,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:16:43,381 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:16:43,526 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:16:43,527 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:16:43,862 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:16:43,973 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:16:43,973 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:16:43,976 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:16:43 BoogieIcfgContainer [2023-08-03 23:16:43,977 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:16:43,980 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:16:43,981 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:16:43,984 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:16:43,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:16:42" (1/3) ... [2023-08-03 23:16:43,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbc300e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:16:43, skipping insertion in model container [2023-08-03 23:16:43,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:16:43" (2/3) ... [2023-08-03 23:16:43,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbc300e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:16:43, skipping insertion in model container [2023-08-03 23:16:43,987 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:16:43" (3/3) ... [2023-08-03 23:16:43,988 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix015.opt_bound2.i [2023-08-03 23:16:43,995 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:16:44,004 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:16:44,004 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:16:44,004 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:16:44,063 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:16:44,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 134 transitions, 283 flow [2023-08-03 23:16:44,246 INFO L124 PetriNetUnfolderBase]: 30/458 cut-off events. [2023-08-03 23:16:44,247 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:16:44,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 458 events. 30/458 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2014 event pairs, 0 based on Foata normal form. 0/402 useless extension candidates. Maximal degree in co-relation 271. Up to 16 conditions per place. [2023-08-03 23:16:44,253 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 134 transitions, 283 flow [2023-08-03 23:16:44,258 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 110 places, 105 transitions, 225 flow [2023-08-03 23:16:44,261 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:16:44,269 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 110 places, 105 transitions, 225 flow [2023-08-03 23:16:44,271 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 110 places, 105 transitions, 225 flow [2023-08-03 23:16:44,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 105 transitions, 225 flow [2023-08-03 23:16:44,300 INFO L124 PetriNetUnfolderBase]: 6/226 cut-off events. [2023-08-03 23:16:44,300 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:16:44,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 226 events. 6/226 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 657 event pairs, 0 based on Foata normal form. 0/210 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-03 23:16:44,303 INFO L119 LiptonReduction]: Number of co-enabled transitions 1468 [2023-08-03 23:16:47,505 INFO L134 LiptonReduction]: Checked pairs total: 2973 [2023-08-03 23:16:47,505 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-03 23:16:47,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:16:47,524 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;@68444f18, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:16:47,524 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:16:47,527 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:16:47,528 INFO L124 PetriNetUnfolderBase]: 0/19 cut-off events. [2023-08-03 23:16:47,528 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:16:47,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:16:47,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:16:47,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:16:47,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:16:47,533 INFO L85 PathProgramCache]: Analyzing trace with hash -465023376, now seen corresponding path program 1 times [2023-08-03 23:16:47,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:16:47,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45109629] [2023-08-03 23:16:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:16:47,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:16:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:16:47,641 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:16:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:16:47,681 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:16:47,683 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:16:47,684 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:16:47,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:16:47,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:16:47,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:16:47,687 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-03 23:16:47,696 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:16:47,697 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:16:47,697 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:16:47,729 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:16:47,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 160 transitions, 356 flow [2023-08-03 23:16:47,907 INFO L124 PetriNetUnfolderBase]: 93/1411 cut-off events. [2023-08-03 23:16:47,907 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:16:47,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 1411 events. 93/1411 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9769 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 1016. Up to 54 conditions per place. [2023-08-03 23:16:47,921 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 160 transitions, 356 flow [2023-08-03 23:16:47,924 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 131 transitions, 298 flow [2023-08-03 23:16:47,924 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:16:47,925 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 131 transitions, 298 flow [2023-08-03 23:16:47,925 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 131 transitions, 298 flow [2023-08-03 23:16:47,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 131 transitions, 298 flow [2023-08-03 23:16:47,997 INFO L124 PetriNetUnfolderBase]: 12/628 cut-off events. [2023-08-03 23:16:47,998 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:16:48,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 726 conditions, 628 events. 12/628 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3238 event pairs, 0 based on Foata normal form. 0/586 useless extension candidates. Maximal degree in co-relation 494. Up to 27 conditions per place. [2023-08-03 23:16:48,012 INFO L119 LiptonReduction]: Number of co-enabled transitions 4128 [2023-08-03 23:16:51,048 INFO L134 LiptonReduction]: Checked pairs total: 14322 [2023-08-03 23:16:51,048 INFO L136 LiptonReduction]: Total number of compositions: 90 [2023-08-03 23:16:51,050 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:16:51,051 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;@68444f18, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:16:51,051 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:16:51,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:16:51,058 INFO L124 PetriNetUnfolderBase]: 0/63 cut-off events. [2023-08-03 23:16:51,058 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 23:16:51,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:16:51,058 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:16:51,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:16:51,059 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:16:51,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1483808621, now seen corresponding path program 1 times [2023-08-03 23:16:51,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:16:51,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37770295] [2023-08-03 23:16:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:16:51,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:16:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:16:51,172 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:16:51,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:16:51,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37770295] [2023-08-03 23:16:51,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37770295] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:16:51,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:16:51,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:16:51,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23524668] [2023-08-03 23:16:51,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:16:51,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:16:51,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:16:51,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:16:51,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:16:51,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 250 [2023-08-03 23:16:51,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:16:51,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:16:51,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 250 [2023-08-03 23:16:51,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:17:01,870 INFO L124 PetriNetUnfolderBase]: 78164/103808 cut-off events. [2023-08-03 23:17:01,870 INFO L125 PetriNetUnfolderBase]: For 5340/5340 co-relation queries the response was YES. [2023-08-03 23:17:02,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210583 conditions, 103808 events. 78164/103808 cut-off events. For 5340/5340 co-relation queries the response was YES. Maximal size of possible extension queue 4663. Compared 718146 event pairs, 70764 based on Foata normal form. 0/96027 useless extension candidates. Maximal degree in co-relation 60322. Up to 100362 conditions per place. [2023-08-03 23:17:02,863 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 36 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-03 23:17:02,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 216 flow [2023-08-03 23:17:02,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:17:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:17:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-08-03 23:17:02,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584 [2023-08-03 23:17:02,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-08-03 23:17:02,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-08-03 23:17:02,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:17:02,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-08-03 23:17:02,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:02,900 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:02,901 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:02,903 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 132 flow. Second operand 3 states and 438 transitions. [2023-08-03 23:17:02,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 216 flow [2023-08-03 23:17:02,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 52 transitions, 210 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:17:02,918 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 138 flow [2023-08-03 23:17:02,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-08-03 23:17:02,925 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-03 23:17:02,926 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 138 flow [2023-08-03 23:17:02,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:02,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:02,935 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:17:02,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:17:02,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:17:02,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:02,939 INFO L85 PathProgramCache]: Analyzing trace with hash -540639781, now seen corresponding path program 1 times [2023-08-03 23:17:02,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:02,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665369524] [2023-08-03 23:17:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:02,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:03,096 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:17:03,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:17:03,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665369524] [2023-08-03 23:17:03,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665369524] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:17:03,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421241548] [2023-08-03 23:17:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:03,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:17:03,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:17:03,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:17:03,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:17:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:03,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:17:03,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:17:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:17:03,286 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:17:03,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421241548] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:17:03,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:17:03,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:17:03,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858623821] [2023-08-03 23:17:03,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:17:03,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:17:03,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:17:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:17:03,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:17:03,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 250 [2023-08-03 23:17:03,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 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) [2023-08-03 23:17:03,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:17:03,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 250 [2023-08-03 23:17:03,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:17:13,304 INFO L124 PetriNetUnfolderBase]: 78152/103685 cut-off events. [2023-08-03 23:17:13,304 INFO L125 PetriNetUnfolderBase]: For 4708/4708 co-relation queries the response was YES. [2023-08-03 23:17:13,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209875 conditions, 103685 events. 78152/103685 cut-off events. For 4708/4708 co-relation queries the response was YES. Maximal size of possible extension queue 4652. Compared 716482 event pairs, 52276 based on Foata normal form. 9/96118 useless extension candidates. Maximal degree in co-relation 134963. Up to 100315 conditions per place. [2023-08-03 23:17:14,077 INFO L140 encePairwiseOnDemand]: 246/250 looper letters, 39 selfloop transitions, 4 changer transitions 0/56 dead transitions. [2023-08-03 23:17:14,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 56 transitions, 238 flow [2023-08-03 23:17:14,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:17:14,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:17:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 704 transitions. [2023-08-03 23:17:14,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5632 [2023-08-03 23:17:14,080 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 704 transitions. [2023-08-03 23:17:14,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 704 transitions. [2023-08-03 23:17:14,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:17:14,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 704 transitions. [2023-08-03 23:17:14,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.8) internal successors, (704), 5 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:14,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:14,086 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:14,086 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 138 flow. Second operand 5 states and 704 transitions. [2023-08-03 23:17:14,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 56 transitions, 238 flow [2023-08-03 23:17:14,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 56 transitions, 235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:17:14,089 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 152 flow [2023-08-03 23:17:14,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2023-08-03 23:17:14,090 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-03 23:17:14,090 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 152 flow [2023-08-03 23:17:14,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.6) internal successors, (668), 5 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) [2023-08-03 23:17:14,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:14,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:17:14,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:17:14,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:17:14,295 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:17:14,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:14,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1202674394, now seen corresponding path program 1 times [2023-08-03 23:17:14,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:14,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491595451] [2023-08-03 23:17:14,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:14,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:17:14,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:17:14,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491595451] [2023-08-03 23:17:14,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491595451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:17:14,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596811928] [2023-08-03 23:17:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:14,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:17:14,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:17:14,399 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:17:14,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:17:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:14,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:17:14,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:17:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:17:14,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:17:14,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596811928] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:17:14,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:17:14,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:17:14,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026029918] [2023-08-03 23:17:14,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:17:14,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:17:14,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:17:14,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:17:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:17:14,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 250 [2023-08-03 23:17:14,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:14,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:17:14,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 250 [2023-08-03 23:17:14,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:17:23,322 INFO L124 PetriNetUnfolderBase]: 75822/102894 cut-off events. [2023-08-03 23:17:23,322 INFO L125 PetriNetUnfolderBase]: For 4426/4426 co-relation queries the response was YES. [2023-08-03 23:17:23,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206193 conditions, 102894 events. 75822/102894 cut-off events. For 4426/4426 co-relation queries the response was YES. Maximal size of possible extension queue 4783. Compared 739455 event pairs, 59934 based on Foata normal form. 0/96056 useless extension candidates. Maximal degree in co-relation 59312. Up to 96840 conditions per place. [2023-08-03 23:17:23,964 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 42 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2023-08-03 23:17:23,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 260 flow [2023-08-03 23:17:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:17:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:17:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-03 23:17:23,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5906666666666667 [2023-08-03 23:17:23,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-03 23:17:23,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-03 23:17:23,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:17:23,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-03 23:17:23,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:23,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:23,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 250.0) internal successors, (1000), 4 states have internal predecessors, (1000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:23,968 INFO L175 Difference]: Start difference. First operand has 67 places, 49 transitions, 152 flow. Second operand 3 states and 443 transitions. [2023-08-03 23:17:23,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 260 flow [2023-08-03 23:17:23,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 58 transitions, 253 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:17:23,971 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 160 flow [2023-08-03 23:17:23,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2023-08-03 23:17:23,971 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2023-08-03 23:17:23,972 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 160 flow [2023-08-03 23:17:23,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:23,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:23,972 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:17:23,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:17:24,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-03 23:17:24,178 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:17:24,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:24,178 INFO L85 PathProgramCache]: Analyzing trace with hash 388785018, now seen corresponding path program 1 times [2023-08-03 23:17:24,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:24,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571927285] [2023-08-03 23:17:24,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:24,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:17:24,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:17:24,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571927285] [2023-08-03 23:17:24,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571927285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:17:24,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039249873] [2023-08-03 23:17:24,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:24,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:17:24,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:17:24,250 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:17:24,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:17:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:24,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:17:24,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:17:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:17:24,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:17:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:17:24,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039249873] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:17:24,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:17:24,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:17:24,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564160991] [2023-08-03 23:17:24,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:17:24,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:17:24,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:17:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:17:24,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:17:24,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 250 [2023-08-03 23:17:24,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:24,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:17:24,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 250 [2023-08-03 23:17:24,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:17:31,091 INFO L124 PetriNetUnfolderBase]: 59515/79819 cut-off events. [2023-08-03 23:17:31,091 INFO L125 PetriNetUnfolderBase]: For 3681/3681 co-relation queries the response was YES. [2023-08-03 23:17:31,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160358 conditions, 79819 events. 59515/79819 cut-off events. For 3681/3681 co-relation queries the response was YES. Maximal size of possible extension queue 4042. Compared 550650 event pairs, 38349 based on Foata normal form. 3/74877 useless extension candidates. Maximal degree in co-relation 56959. Up to 75373 conditions per place. [2023-08-03 23:17:31,623 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 40 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2023-08-03 23:17:31,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 56 transitions, 253 flow [2023-08-03 23:17:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:17:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:17:31,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 571 transitions. [2023-08-03 23:17:31,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571 [2023-08-03 23:17:31,625 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 571 transitions. [2023-08-03 23:17:31,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 571 transitions. [2023-08-03 23:17:31,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:17:31,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 571 transitions. [2023-08-03 23:17:31,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.75) internal successors, (571), 4 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:31,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:31,629 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:31,629 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 160 flow. Second operand 4 states and 571 transitions. [2023-08-03 23:17:31,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 56 transitions, 253 flow [2023-08-03 23:17:31,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 56 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:17:31,633 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 155 flow [2023-08-03 23:17:31,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2023-08-03 23:17:31,634 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2023-08-03 23:17:31,634 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 155 flow [2023-08-03 23:17:31,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:31,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:31,635 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:17:31,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 23:17:31,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:17:31,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:17:31,845 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1520236396, now seen corresponding path program 1 times [2023-08-03 23:17:31,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:31,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952628695] [2023-08-03 23:17:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:17:31,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:17:31,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952628695] [2023-08-03 23:17:31,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952628695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:17:31,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886451041] [2023-08-03 23:17:31,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:31,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:17:31,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:17:31,957 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:17:31,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:17:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:32,043 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:17:32,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:17:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:17:32,067 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:17:32,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886451041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:17:32,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:17:32,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:17:32,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449249377] [2023-08-03 23:17:32,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:17:32,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:17:32,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:17:32,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:17:32,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:17:32,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 250 [2023-08-03 23:17:32,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:32,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:17:32,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 250 [2023-08-03 23:17:32,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:17:38,441 INFO L124 PetriNetUnfolderBase]: 59107/79426 cut-off events. [2023-08-03 23:17:38,441 INFO L125 PetriNetUnfolderBase]: For 3211/3211 co-relation queries the response was YES. [2023-08-03 23:17:38,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159354 conditions, 79426 events. 59107/79426 cut-off events. For 3211/3211 co-relation queries the response was YES. Maximal size of possible extension queue 4050. Compared 549590 event pairs, 17122 based on Foata normal form. 144/74515 useless extension candidates. Maximal degree in co-relation 56589. Up to 74007 conditions per place. [2023-08-03 23:17:39,170 INFO L140 encePairwiseOnDemand]: 246/250 looper letters, 55 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-03 23:17:39,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 71 transitions, 317 flow [2023-08-03 23:17:39,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:17:39,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:17:39,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 719 transitions. [2023-08-03 23:17:39,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5752 [2023-08-03 23:17:39,173 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 719 transitions. [2023-08-03 23:17:39,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 719 transitions. [2023-08-03 23:17:39,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:17:39,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 719 transitions. [2023-08-03 23:17:39,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.8) internal successors, (719), 5 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:39,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:39,179 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 250.0) internal successors, (1500), 6 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:39,179 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 155 flow. Second operand 5 states and 719 transitions. [2023-08-03 23:17:39,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 71 transitions, 317 flow [2023-08-03 23:17:39,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 310 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:17:39,182 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 165 flow [2023-08-03 23:17:39,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-03 23:17:39,183 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-03 23:17:39,183 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 165 flow [2023-08-03 23:17:39,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:39,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:39,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:17:39,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 23:17:39,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:17:39,388 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:17:39,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:39,389 INFO L85 PathProgramCache]: Analyzing trace with hash -775281540, now seen corresponding path program 1 times [2023-08-03 23:17:39,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:39,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771242421] [2023-08-03 23:17:39,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:39,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:17:39,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:17:39,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771242421] [2023-08-03 23:17:39,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771242421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:17:39,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511040240] [2023-08-03 23:17:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:39,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:17:39,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:17:39,471 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:17:39,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:17:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:39,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:17:39,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:17:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:17:39,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:17:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:17:39,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511040240] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:17:39,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:17:39,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:17:39,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167281398] [2023-08-03 23:17:39,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:17:39,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:17:39,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:17:39,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:17:39,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:17:39,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 250 [2023-08-03 23:17:39,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:39,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:17:39,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 250 [2023-08-03 23:17:39,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:17:45,014 INFO L124 PetriNetUnfolderBase]: 49312/65671 cut-off events. [2023-08-03 23:17:45,014 INFO L125 PetriNetUnfolderBase]: For 3493/3493 co-relation queries the response was YES. [2023-08-03 23:17:45,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132318 conditions, 65671 events. 49312/65671 cut-off events. For 3493/3493 co-relation queries the response was YES. Maximal size of possible extension queue 3572. Compared 437044 event pairs, 30214 based on Foata normal form. 36/61660 useless extension candidates. Maximal degree in co-relation 46898. Up to 61204 conditions per place. [2023-08-03 23:17:45,446 INFO L140 encePairwiseOnDemand]: 247/250 looper letters, 51 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-08-03 23:17:45,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 303 flow [2023-08-03 23:17:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:17:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:17:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 582 transitions. [2023-08-03 23:17:45,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582 [2023-08-03 23:17:45,448 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 582 transitions. [2023-08-03 23:17:45,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 582 transitions. [2023-08-03 23:17:45,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:17:45,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 582 transitions. [2023-08-03 23:17:45,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:45,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:45,452 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:45,452 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 165 flow. Second operand 4 states and 582 transitions. [2023-08-03 23:17:45,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 303 flow [2023-08-03 23:17:45,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 66 transitions, 298 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:17:45,455 INFO L231 Difference]: Finished difference. Result has 72 places, 48 transitions, 158 flow [2023-08-03 23:17:45,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=48} [2023-08-03 23:17:45,456 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 11 predicate places. [2023-08-03 23:17:45,456 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 48 transitions, 158 flow [2023-08-03 23:17:45,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.4) internal successors, (677), 5 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:45,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:45,456 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:17:45,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 23:17:45,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:17:45,661 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:17:45,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:45,662 INFO L85 PathProgramCache]: Analyzing trace with hash -193897439, now seen corresponding path program 1 times [2023-08-03 23:17:45,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:45,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914695730] [2023-08-03 23:17:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:45,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:45,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:17:45,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:17:45,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914695730] [2023-08-03 23:17:45,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914695730] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:17:45,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257161428] [2023-08-03 23:17:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:45,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:17:45,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:17:45,741 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:17:45,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:17:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:45,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:17:45,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:17:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:17:45,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:17:45,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257161428] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:17:45,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:17:45,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:17:45,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422037783] [2023-08-03 23:17:45,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:17:45,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:17:45,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:17:45,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:17:45,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:17:45,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 250 [2023-08-03 23:17:45,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 48 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:45,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:17:45,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 250 [2023-08-03 23:17:45,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:17:48,796 INFO L124 PetriNetUnfolderBase]: 25984/35575 cut-off events. [2023-08-03 23:17:48,796 INFO L125 PetriNetUnfolderBase]: For 2431/2431 co-relation queries the response was YES. [2023-08-03 23:17:48,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73026 conditions, 35575 events. 25984/35575 cut-off events. For 2431/2431 co-relation queries the response was YES. Maximal size of possible extension queue 1994. Compared 228850 event pairs, 952 based on Foata normal form. 5184/38437 useless extension candidates. Maximal degree in co-relation 25982. Up to 28224 conditions per place. [2023-08-03 23:17:48,925 INFO L140 encePairwiseOnDemand]: 248/250 looper letters, 0 selfloop transitions, 0 changer transitions 72/72 dead transitions. [2023-08-03 23:17:48,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 72 transitions, 326 flow [2023-08-03 23:17:48,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:17:48,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:17:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 592 transitions. [2023-08-03 23:17:48,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592 [2023-08-03 23:17:48,927 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 592 transitions. [2023-08-03 23:17:48,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 592 transitions. [2023-08-03 23:17:48,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:17:48,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 592 transitions. [2023-08-03 23:17:48,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:48,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:48,931 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 250.0) internal successors, (1250), 5 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:48,931 INFO L175 Difference]: Start difference. First operand has 72 places, 48 transitions, 158 flow. Second operand 4 states and 592 transitions. [2023-08-03 23:17:48,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 72 transitions, 326 flow [2023-08-03 23:17:49,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 319 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:17:49,066 INFO L231 Difference]: Finished difference. Result has 70 places, 0 transitions, 0 flow [2023-08-03 23:17:49,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=250, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=70, PETRI_TRANSITIONS=0} [2023-08-03 23:17:49,067 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2023-08-03 23:17:49,067 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 0 transitions, 0 flow [2023-08-03 23:17:49,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.75) internal successors, (547), 4 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:49,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:17:49,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:17:49,068 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:17:49,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 23:17:49,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:17:49,268 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:17:49,269 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:17:49,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 160 transitions, 356 flow [2023-08-03 23:17:49,398 INFO L124 PetriNetUnfolderBase]: 93/1411 cut-off events. [2023-08-03 23:17:49,398 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:17:49,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 1411 events. 93/1411 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9769 event pairs, 0 based on Foata normal form. 0/1234 useless extension candidates. Maximal degree in co-relation 1016. Up to 54 conditions per place. [2023-08-03 23:17:49,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 160 transitions, 356 flow [2023-08-03 23:17:49,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 158 transitions, 344 flow [2023-08-03 23:17:49,412 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:17:49,412 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 158 transitions, 344 flow [2023-08-03 23:17:49,412 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 158 transitions, 344 flow [2023-08-03 23:17:49,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 158 transitions, 344 flow [2023-08-03 23:17:49,536 INFO L124 PetriNetUnfolderBase]: 93/1407 cut-off events. [2023-08-03 23:17:49,536 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-03 23:17:49,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1497 conditions, 1407 events. 93/1407 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9734 event pairs, 0 based on Foata normal form. 0/1230 useless extension candidates. Maximal degree in co-relation 1010. Up to 54 conditions per place. [2023-08-03 23:17:49,568 INFO L119 LiptonReduction]: Number of co-enabled transitions 6708 [2023-08-03 23:17:52,610 INFO L134 LiptonReduction]: Checked pairs total: 22924 [2023-08-03 23:17:52,610 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-03 23:17:52,612 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:17:52,612 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;@68444f18, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:17:52,612 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:17:52,615 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:17:52,615 INFO L124 PetriNetUnfolderBase]: 1/21 cut-off events. [2023-08-03 23:17:52,615 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:17:52,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:52,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:17:52,615 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:17:52,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:52,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1599810832, now seen corresponding path program 1 times [2023-08-03 23:17:52,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:52,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367412128] [2023-08-03 23:17:52,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:52,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:52,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:17:52,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:17:52,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367412128] [2023-08-03 23:17:52,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367412128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:17:52,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:17:52,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:17:52,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996758402] [2023-08-03 23:17:52,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:17:52,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:17:52,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:17:52,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:17:52,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:17:52,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 281 [2023-08-03 23:17:52,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:52,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:17:52,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 281 [2023-08-03 23:17:52,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:32,460 INFO L124 PetriNetUnfolderBase]: 378842/493109 cut-off events. [2023-08-03 23:18:32,460 INFO L125 PetriNetUnfolderBase]: For 5481/5481 co-relation queries the response was YES. [2023-08-03 23:18:33,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976792 conditions, 493109 events. 378842/493109 cut-off events. For 5481/5481 co-relation queries the response was YES. Maximal size of possible extension queue 18646. Compared 3577388 event pairs, 346158 based on Foata normal form. 10836/441126 useless extension candidates. Maximal degree in co-relation 282013. Up to 476892 conditions per place. [2023-08-03 23:18:35,992 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 43 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-03 23:18:35,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 57 transitions, 232 flow [2023-08-03 23:18:35,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:18:35,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:18:35,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-08-03 23:18:35,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5290628706998813 [2023-08-03 23:18:35,995 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-08-03 23:18:35,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-08-03 23:18:36,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:18:36,010 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-08-03 23:18:36,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:36,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:36,013 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:36,013 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 136 flow. Second operand 3 states and 446 transitions. [2023-08-03 23:18:36,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 57 transitions, 232 flow [2023-08-03 23:18:36,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 230 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-03 23:18:36,021 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 144 flow [2023-08-03 23:18:36,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2023-08-03 23:18:36,021 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 3 predicate places. [2023-08-03 23:18:36,021 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 144 flow [2023-08-03 23:18:36,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:36,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:36,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:18:36,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 23:18:36,022 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:18:36,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:36,022 INFO L85 PathProgramCache]: Analyzing trace with hash 242441823, now seen corresponding path program 1 times [2023-08-03 23:18:36,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:36,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548323027] [2023-08-03 23:18:36,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:36,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:18:36,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:36,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548323027] [2023-08-03 23:18:36,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548323027] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:18:36,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203491672] [2023-08-03 23:18:36,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:36,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:36,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:18:36,121 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:18:36,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 23:18:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:36,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:18:36,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:18:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:18:36,255 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:18:36,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203491672] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:18:36,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:18:36,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:18:36,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664376732] [2023-08-03 23:18:36,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:18:36,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:18:36,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:36,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:18:36,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:18:36,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 281 [2023-08-03 23:18:36,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 54 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:36,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:36,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 281 [2023-08-03 23:18:36,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:19:19,058 INFO L124 PetriNetUnfolderBase]: 366838/478060 cut-off events. [2023-08-03 23:19:19,058 INFO L125 PetriNetUnfolderBase]: For 4251/4251 co-relation queries the response was YES. [2023-08-03 23:19:20,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 944537 conditions, 478060 events. 366838/478060 cut-off events. For 4251/4251 co-relation queries the response was YES. Maximal size of possible extension queue 18428. Compared 3467740 event pairs, 296770 based on Foata normal form. 0/418350 useless extension candidates. Maximal degree in co-relation 944498. Up to 460105 conditions per place. [2023-08-03 23:19:22,075 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 49 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-03 23:19:22,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 264 flow [2023-08-03 23:19:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:19:22,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:19:22,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-03 23:19:22,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338078291814946 [2023-08-03 23:19:22,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-03 23:19:22,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-03 23:19:22,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:19:22,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-03 23:19:22,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:22,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:22,080 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:22,080 INFO L175 Difference]: Start difference. First operand has 69 places, 54 transitions, 144 flow. Second operand 3 states and 450 transitions. [2023-08-03 23:19:22,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 264 flow [2023-08-03 23:19:22,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 63 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:19:22,082 INFO L231 Difference]: Finished difference. Result has 71 places, 55 transitions, 154 flow [2023-08-03 23:19:22,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=71, PETRI_TRANSITIONS=55} [2023-08-03 23:19:22,082 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 5 predicate places. [2023-08-03 23:19:22,083 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 55 transitions, 154 flow [2023-08-03 23:19:22,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:22,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:19:22,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:19:22,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 23:19:22,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:19:22,288 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P2Err0ASSERT_VIOLATIONERROR_FUNCTION === [P2Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P2Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:19:22,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:19:22,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1385115681, now seen corresponding path program 1 times [2023-08-03 23:19:22,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:19:22,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604041240] [2023-08-03 23:19:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:19:22,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:19:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:19:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:19:22,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:19:22,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604041240] [2023-08-03 23:19:22,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604041240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:19:22,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072670770] [2023-08-03 23:19:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:19:22,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:19:22,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:19:22,341 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:19:22,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 23:19:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:19:22,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:19:22,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:19:22,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:19:22,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:19:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:19:22,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072670770] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:19:22,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:19:22,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:19:22,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896638214] [2023-08-03 23:19:22,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:19:22,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:19:22,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:19:22,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:19:22,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:19:22,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 281 [2023-08-03 23:19:22,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 55 transitions, 154 flow. Second operand has 5 states, 5 states have (on average 135.2) internal successors, (676), 5 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:22,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:19:22,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 281 [2023-08-03 23:19:22,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand