/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_safe015_rmo_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:34:29,553 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:34:29,628 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:34:29,634 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:34:29,634 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:34:29,635 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:34:29,635 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:34:29,662 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:34:29,662 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:34:29,666 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:34:29,666 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:34:29,667 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:34:29,667 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:34:29,668 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:34:29,668 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:34:29,669 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:34:29,669 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:34:29,669 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:34:29,669 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:34:29,669 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:34:29,670 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:34:29,670 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:34:29,670 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:34:29,670 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:34:29,670 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:34:29,672 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:34:29,672 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:34:29,672 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:34:29,672 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:34:29,673 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:34:29,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:34:29,674 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:34:29,674 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:34:29,674 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:34:29,674 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:34:29,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:34:29,674 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:34:29,675 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:34:29,675 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:34:29,675 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:34:29,675 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:34:29,675 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:34:29,905 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:34:29,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:34:29,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:34:29,932 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:34:29,932 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:34:29,933 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe015_rmo_bound2.i [2023-08-04 00:34:31,052 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:34:31,250 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:34:31,250 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe015_rmo_bound2.i [2023-08-04 00:34:31,264 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81df0bdbe/7eccb52f3a55477490b4cb5ce7199856/FLAG6778fb2ad [2023-08-04 00:34:31,288 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81df0bdbe/7eccb52f3a55477490b4cb5ce7199856 [2023-08-04 00:34:31,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:34:31,291 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:34:31,292 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:34:31,292 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:34:31,299 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:34:31,300 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:31,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e4d34e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31, skipping insertion in model container [2023-08-04 00:34:31,301 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:31,341 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:34:31,463 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_safe015_rmo_bound2.i[988,1001] [2023-08-04 00:34:31,702 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:34:31,717 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:34:31,728 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_safe015_rmo_bound2.i[988,1001] [2023-08-04 00:34:31,746 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:34:31,748 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 00:34:31,809 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:34:31,855 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:34:31,856 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:34:31,862 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:34:31,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31 WrapperNode [2023-08-04 00:34:31,863 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:34:31,864 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:34:31,864 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:34:31,864 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:34:31,870 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:31,901 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:31,942 INFO L138 Inliner]: procedures = 176, calls = 84, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 193 [2023-08-04 00:34:31,943 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:34:31,943 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:34:31,944 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:34:31,944 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:34:31,952 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:31,953 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:31,958 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:31,958 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:31,968 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:31,974 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:31,977 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:31,979 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:31,983 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:34:31,984 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:34:31,984 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:34:31,984 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:34:32,001 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31" (1/1) ... [2023-08-04 00:34:32,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:34:32,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:34:32,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:34:32,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:34:32,077 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 00:34:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:34:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:34:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:34:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:34:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:34:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:34:32,078 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:34:32,078 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:34:32,078 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:34:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:34:32,079 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:34:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:34:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:34:32,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:34:32,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:34:32,081 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:34:32,207 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:34:32,209 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:34:32,638 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:34:32,928 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:34:32,928 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:34:32,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:34:32 BoogieIcfgContainer [2023-08-04 00:34:32,931 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:34:32,933 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:34:32,934 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:34:32,936 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:34:32,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:34:31" (1/3) ... [2023-08-04 00:34:32,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662c144a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:34:32, skipping insertion in model container [2023-08-04 00:34:32,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:34:31" (2/3) ... [2023-08-04 00:34:32,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@662c144a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:34:32, skipping insertion in model container [2023-08-04 00:34:32,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:34:32" (3/3) ... [2023-08-04 00:34:32,940 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe015_rmo_bound2.i [2023-08-04 00:34:32,947 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:34:32,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:34:32,955 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:34:32,955 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:34:33,031 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:34:33,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 00:34:33,189 INFO L124 PetriNetUnfolderBase]: 30/464 cut-off events. [2023-08-04 00:34:33,189 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:34:33,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 464 events. 30/464 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1981 event pairs, 0 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 285. Up to 16 conditions per place. [2023-08-04 00:34:33,205 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 00:34:33,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 116 transitions, 247 flow [2023-08-04 00:34:33,215 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:34:33,223 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 00:34:33,225 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 00:34:33,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 116 transitions, 247 flow [2023-08-04 00:34:33,264 INFO L124 PetriNetUnfolderBase]: 6/232 cut-off events. [2023-08-04 00:34:33,264 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:34:33,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 232 events. 6/232 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 633 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2023-08-04 00:34:33,267 INFO L119 LiptonReduction]: Number of co-enabled transitions 1236 [2023-08-04 00:34:37,833 INFO L134 LiptonReduction]: Checked pairs total: 3279 [2023-08-04 00:34:37,833 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-04 00:34:37,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:34:37,853 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;@58faadf7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:34:37,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:34:37,862 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:34:37,862 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 00:34:37,863 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:34:37,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:34:37,863 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:34:37,864 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:34:37,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:34:37,868 INFO L85 PathProgramCache]: Analyzing trace with hash -6383729, now seen corresponding path program 1 times [2023-08-04 00:34:37,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:34:37,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234579531] [2023-08-04 00:34:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:37,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:34:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:34:38,013 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:34:38,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:34:38,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:34:38,057 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:34:38,058 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:34:38,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:34:38,059 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:34:38,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:34:38,060 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:34:38,062 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:34:38,063 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:34:38,063 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:34:38,106 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:34:38,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:34:38,302 INFO L124 PetriNetUnfolderBase]: 93/1391 cut-off events. [2023-08-04 00:34:38,302 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:34:38,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 1391 events. 93/1391 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9476 event pairs, 0 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 1014. Up to 54 conditions per place. [2023-08-04 00:34:38,311 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:34:38,315 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 139 transitions, 314 flow [2023-08-04 00:34:38,315 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:34:38,315 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 139 transitions, 314 flow [2023-08-04 00:34:38,316 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 139 transitions, 314 flow [2023-08-04 00:34:38,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 139 transitions, 314 flow [2023-08-04 00:34:38,413 INFO L124 PetriNetUnfolderBase]: 12/608 cut-off events. [2023-08-04 00:34:38,414 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:34:38,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 706 conditions, 608 events. 12/608 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3005 event pairs, 0 based on Foata normal form. 0/584 useless extension candidates. Maximal degree in co-relation 492. Up to 27 conditions per place. [2023-08-04 00:34:38,425 INFO L119 LiptonReduction]: Number of co-enabled transitions 3388 [2023-08-04 00:34:42,973 INFO L134 LiptonReduction]: Checked pairs total: 11428 [2023-08-04 00:34:42,974 INFO L136 LiptonReduction]: Total number of compositions: 102 [2023-08-04 00:34:42,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:34:42,978 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;@58faadf7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:34:42,978 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:34:42,986 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:34:42,986 INFO L124 PetriNetUnfolderBase]: 0/64 cut-off events. [2023-08-04 00:34:42,986 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:34:42,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:34:42,987 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:34:42,987 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:34:42,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:34:42,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1662485929, now seen corresponding path program 1 times [2023-08-04 00:34:42,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:34:42,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694966504] [2023-08-04 00:34:42,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:42,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:34:43,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:34:43,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:34:43,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694966504] [2023-08-04 00:34:43,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694966504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:34:43,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:34:43,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:34:43,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656032961] [2023-08-04 00:34:43,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:34:43,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:34:43,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:34:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:34:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:34:43,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 270 [2023-08-04 00:34:43,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:43,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:34:43,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 270 [2023-08-04 00:34:43,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:34:54,326 INFO L124 PetriNetUnfolderBase]: 64827/88758 cut-off events. [2023-08-04 00:34:54,326 INFO L125 PetriNetUnfolderBase]: For 5928/5928 co-relation queries the response was YES. [2023-08-04 00:34:54,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179257 conditions, 88758 events. 64827/88758 cut-off events. For 5928/5928 co-relation queries the response was YES. Maximal size of possible extension queue 2639. Compared 589747 event pairs, 50940 based on Foata normal form. 0/87814 useless extension candidates. Maximal degree in co-relation 41521. Up to 83344 conditions per place. [2023-08-04 00:34:54,983 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 35 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 00:34:54,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 47 transitions, 204 flow [2023-08-04 00:34:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:34:54,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:34:55,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 464 transitions. [2023-08-04 00:34:55,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5728395061728395 [2023-08-04 00:34:55,007 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 464 transitions. [2023-08-04 00:34:55,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 464 transitions. [2023-08-04 00:34:55,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:34:55,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 464 transitions. [2023-08-04 00:34:55,018 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:55,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:55,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:55,027 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 120 flow. Second operand 3 states and 464 transitions. [2023-08-04 00:34:55,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 47 transitions, 204 flow [2023-08-04 00:34:55,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 198 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:34:55,047 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 126 flow [2023-08-04 00:34:55,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-08-04 00:34:55,055 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 3 predicate places. [2023-08-04 00:34:55,057 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 126 flow [2023-08-04 00:34:55,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:55,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:34:55,062 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:34:55,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:34:55,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:34:55,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:34:55,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1529281124, now seen corresponding path program 1 times [2023-08-04 00:34:55,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:34:55,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880397362] [2023-08-04 00:34:55,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:55,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:34:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:55,152 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:34:55,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:34:55,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880397362] [2023-08-04 00:34:55,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880397362] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:34:55,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754700743] [2023-08-04 00:34:55,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:34:55,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:34:55,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:34:55,161 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:34:55,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:34:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:34:55,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:34:55,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:34:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:34:55,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:34:55,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754700743] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:34:55,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:34:55,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:34:55,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458863129] [2023-08-04 00:34:55,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:34:55,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:34:55,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:34:55,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:34:55,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:34:55,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 00:34:55,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 43 transitions, 126 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:34:55,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:34:55,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 00:34:55,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:35:05,756 INFO L124 PetriNetUnfolderBase]: 64803/88794 cut-off events. [2023-08-04 00:35:05,756 INFO L125 PetriNetUnfolderBase]: For 5384/5384 co-relation queries the response was YES. [2023-08-04 00:35:06,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178812 conditions, 88794 events. 64803/88794 cut-off events. For 5384/5384 co-relation queries the response was YES. Maximal size of possible extension queue 2638. Compared 591195 event pairs, 39840 based on Foata normal form. 16/87930 useless extension candidates. Maximal degree in co-relation 47005. Up to 83261 conditions per place. [2023-08-04 00:35:06,384 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 40 selfloop transitions, 4 changer transitions 0/53 dead transitions. [2023-08-04 00:35:06,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 234 flow [2023-08-04 00:35:06,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:35:06,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:35:06,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 750 transitions. [2023-08-04 00:35:06,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-08-04 00:35:06,390 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 750 transitions. [2023-08-04 00:35:06,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 750 transitions. [2023-08-04 00:35:06,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:35:06,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 750 transitions. [2023-08-04 00:35:06,393 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.0) internal successors, (750), 5 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:06,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:06,397 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:06,398 INFO L175 Difference]: Start difference. First operand has 58 places, 43 transitions, 126 flow. Second operand 5 states and 750 transitions. [2023-08-04 00:35:06,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 53 transitions, 234 flow [2023-08-04 00:35:06,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 53 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:35:06,400 INFO L231 Difference]: Finished difference. Result has 61 places, 43 transitions, 140 flow [2023-08-04 00:35:06,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=140, PETRI_PLACES=61, PETRI_TRANSITIONS=43} [2023-08-04 00:35:06,401 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2023-08-04 00:35:06,401 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 43 transitions, 140 flow [2023-08-04 00:35:06,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:06,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:35:06,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:35:06,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:35:06,607 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 [2023-08-04 00:35:06,608 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:35:06,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:35:06,608 INFO L85 PathProgramCache]: Analyzing trace with hash 645086682, now seen corresponding path program 1 times [2023-08-04 00:35:06,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:35:06,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137830796] [2023-08-04 00:35:06,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:35:06,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:35:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:35:06,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:35:06,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:35:06,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137830796] [2023-08-04 00:35:06,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137830796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:35:06,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618955273] [2023-08-04 00:35:06,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:35:06,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:35:06,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:35:06,677 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:35:06,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:35:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:35:06,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:35:06,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:35:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:35:06,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:35:06,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618955273] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:35:06,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:35:06,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:35:06,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492456967] [2023-08-04 00:35:06,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:35:06,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:35:06,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:35:06,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:35:06,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:35:06,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 270 [2023-08-04 00:35:06,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 43 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:06,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:35:06,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 270 [2023-08-04 00:35:06,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:35:16,730 INFO L124 PetriNetUnfolderBase]: 62916/86567 cut-off events. [2023-08-04 00:35:16,730 INFO L125 PetriNetUnfolderBase]: For 4980/4980 co-relation queries the response was YES. [2023-08-04 00:35:16,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174221 conditions, 86567 events. 62916/86567 cut-off events. For 4980/4980 co-relation queries the response was YES. Maximal size of possible extension queue 2712. Compared 580609 event pairs, 49614 based on Foata normal form. 0/85207 useless extension candidates. Maximal degree in co-relation 40450. Up to 80321 conditions per place. [2023-08-04 00:35:17,275 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 42 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-04 00:35:17,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 252 flow [2023-08-04 00:35:17,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:35:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:35:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-04 00:35:17,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5802469135802469 [2023-08-04 00:35:17,281 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-04 00:35:17,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-04 00:35:17,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:35:17,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-04 00:35:17,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:17,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:17,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:17,285 INFO L175 Difference]: Start difference. First operand has 61 places, 43 transitions, 140 flow. Second operand 3 states and 470 transitions. [2023-08-04 00:35:17,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 252 flow [2023-08-04 00:35:17,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 245 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:35:17,288 INFO L231 Difference]: Finished difference. Result has 62 places, 44 transitions, 148 flow [2023-08-04 00:35:17,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=62, PETRI_TRANSITIONS=44} [2023-08-04 00:35:17,294 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 7 predicate places. [2023-08-04 00:35:17,295 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 44 transitions, 148 flow [2023-08-04 00:35:17,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:17,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:35:17,296 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:35:17,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 00:35:17,501 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 [2023-08-04 00:35:17,501 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:35:17,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:35:17,502 INFO L85 PathProgramCache]: Analyzing trace with hash 2059260814, now seen corresponding path program 1 times [2023-08-04 00:35:17,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:35:17,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963630173] [2023-08-04 00:35:17,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:35:17,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:35:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:35:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:35:17,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:35:17,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963630173] [2023-08-04 00:35:17,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963630173] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:35:17,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160860393] [2023-08-04 00:35:17,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:35:17,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:35:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:35:17,586 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:35:17,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:35:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:35:17,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:35:17,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:35:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:35:17,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:35:17,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:35:17,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160860393] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:35:17,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:35:17,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:35:17,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828715788] [2023-08-04 00:35:17,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:35:17,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:35:17,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:35:17,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:35:17,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:35:17,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 00:35:17,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 44 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:17,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:35:17,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 00:35:17,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:35:25,677 INFO L124 PetriNetUnfolderBase]: 52458/71869 cut-off events. [2023-08-04 00:35:25,677 INFO L125 PetriNetUnfolderBase]: For 4728/4728 co-relation queries the response was YES. [2023-08-04 00:35:25,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144829 conditions, 71869 events. 52458/71869 cut-off events. For 4728/4728 co-relation queries the response was YES. Maximal size of possible extension queue 2359. Compared 467184 event pairs, 31248 based on Foata normal form. 4/71569 useless extension candidates. Maximal degree in co-relation 37953. Up to 66569 conditions per place. [2023-08-04 00:35:26,118 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 41 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-04 00:35:26,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 249 flow [2023-08-04 00:35:26,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:35:26,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:35:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2023-08-04 00:35:26,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.562962962962963 [2023-08-04 00:35:26,120 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2023-08-04 00:35:26,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2023-08-04 00:35:26,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:35:26,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2023-08-04 00:35:26,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:26,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:26,125 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:26,125 INFO L175 Difference]: Start difference. First operand has 62 places, 44 transitions, 148 flow. Second operand 4 states and 608 transitions. [2023-08-04 00:35:26,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 249 flow [2023-08-04 00:35:26,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 247 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:35:26,128 INFO L231 Difference]: Finished difference. Result has 64 places, 43 transitions, 143 flow [2023-08-04 00:35:26,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=64, PETRI_TRANSITIONS=43} [2023-08-04 00:35:26,129 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-04 00:35:26,129 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 43 transitions, 143 flow [2023-08-04 00:35:26,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:26,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:35:26,130 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:35:26,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 00:35:26,335 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 [2023-08-04 00:35:26,335 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:35:26,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:35:26,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1973506914, now seen corresponding path program 1 times [2023-08-04 00:35:26,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:35:26,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898404760] [2023-08-04 00:35:26,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:35:26,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:35:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:35:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:35:26,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:35:26,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898404760] [2023-08-04 00:35:26,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898404760] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:35:26,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506527627] [2023-08-04 00:35:26,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:35:26,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:35:26,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:35:26,398 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:35:26,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:35:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:35:26,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:35:26,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:35:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:35:26,546 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:35:26,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506527627] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:35:26,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:35:26,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:35:26,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313174938] [2023-08-04 00:35:26,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:35:26,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:35:26,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:35:26,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:35:26,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:35:26,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 00:35:26,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 43 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:26,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:35:26,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 00:35:26,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:35:34,255 INFO L124 PetriNetUnfolderBase]: 51690/71197 cut-off events. [2023-08-04 00:35:34,255 INFO L125 PetriNetUnfolderBase]: For 3786/3786 co-relation queries the response was YES. [2023-08-04 00:35:34,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143234 conditions, 71197 events. 51690/71197 cut-off events. For 3786/3786 co-relation queries the response was YES. Maximal size of possible extension queue 2401. Compared 469701 event pairs, 12522 based on Foata normal form. 256/71133 useless extension candidates. Maximal degree in co-relation 37521. Up to 64016 conditions per place. [2023-08-04 00:35:34,677 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 59 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-04 00:35:34,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 71 transitions, 325 flow [2023-08-04 00:35:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:35:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:35:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 768 transitions. [2023-08-04 00:35:34,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5688888888888889 [2023-08-04 00:35:34,680 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 768 transitions. [2023-08-04 00:35:34,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 768 transitions. [2023-08-04 00:35:34,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:35:34,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 768 transitions. [2023-08-04 00:35:34,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.6) internal successors, (768), 5 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:34,685 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:34,685 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:34,685 INFO L175 Difference]: Start difference. First operand has 64 places, 43 transitions, 143 flow. Second operand 5 states and 768 transitions. [2023-08-04 00:35:34,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 71 transitions, 325 flow [2023-08-04 00:35:34,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 71 transitions, 318 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:35:34,689 INFO L231 Difference]: Finished difference. Result has 65 places, 43 transitions, 153 flow [2023-08-04 00:35:34,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=153, PETRI_PLACES=65, PETRI_TRANSITIONS=43} [2023-08-04 00:35:34,690 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2023-08-04 00:35:34,690 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 43 transitions, 153 flow [2023-08-04 00:35:34,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:34,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:35:34,691 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:35:34,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 00:35:34,899 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 [2023-08-04 00:35:34,899 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:35:34,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:35:34,899 INFO L85 PathProgramCache]: Analyzing trace with hash 71318621, now seen corresponding path program 1 times [2023-08-04 00:35:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:35:34,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405722910] [2023-08-04 00:35:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:35:34,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:35:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:35:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:35:34,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:35:34,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405722910] [2023-08-04 00:35:34,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405722910] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:35:34,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103383635] [2023-08-04 00:35:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:35:34,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:35:34,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:35:34,968 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:35:34,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:35:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:35:35,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:35:35,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:35:35,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:35:35,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:35:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:35:35,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103383635] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:35:35,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:35:35,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:35:35,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448814882] [2023-08-04 00:35:35,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:35:35,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:35:35,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:35:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:35:35,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:35:35,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 00:35:35,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 43 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:35,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:35:35,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 00:35:35,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:35:41,875 INFO L124 PetriNetUnfolderBase]: 43290/59085 cut-off events. [2023-08-04 00:35:41,875 INFO L125 PetriNetUnfolderBase]: For 4870/4870 co-relation queries the response was YES. [2023-08-04 00:35:42,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119854 conditions, 59085 events. 43290/59085 cut-off events. For 4870/4870 co-relation queries the response was YES. Maximal size of possible extension queue 2213. Compared 373319 event pairs, 26154 based on Foata normal form. 64/58893 useless extension candidates. Maximal degree in co-relation 31349. Up to 53081 conditions per place. [2023-08-04 00:35:42,253 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 53 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-04 00:35:42,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 303 flow [2023-08-04 00:35:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:35:42,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:35:42,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 620 transitions. [2023-08-04 00:35:42,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2023-08-04 00:35:42,255 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 620 transitions. [2023-08-04 00:35:42,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 620 transitions. [2023-08-04 00:35:42,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:35:42,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 620 transitions. [2023-08-04 00:35:42,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:42,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:42,259 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:42,259 INFO L175 Difference]: Start difference. First operand has 65 places, 43 transitions, 153 flow. Second operand 4 states and 620 transitions. [2023-08-04 00:35:42,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 64 transitions, 303 flow [2023-08-04 00:35:42,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 298 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:35:42,263 INFO L231 Difference]: Finished difference. Result has 66 places, 42 transitions, 146 flow [2023-08-04 00:35:42,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=146, PETRI_PLACES=66, PETRI_TRANSITIONS=42} [2023-08-04 00:35:42,264 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 11 predicate places. [2023-08-04 00:35:42,264 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 42 transitions, 146 flow [2023-08-04 00:35:42,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:42,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:35:42,265 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:35:42,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:35:42,469 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 [2023-08-04 00:35:42,470 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:35:42,470 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:35:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash 145366801, now seen corresponding path program 1 times [2023-08-04 00:35:42,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:35:42,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403665136] [2023-08-04 00:35:42,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:35:42,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:35:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:35:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:35:42,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:35:42,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403665136] [2023-08-04 00:35:42,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403665136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:35:42,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:35:42,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 00:35:42,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506943340] [2023-08-04 00:35:42,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:35:42,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:35:42,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:35:42,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:35:42,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:35:42,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 270 [2023-08-04 00:35:42,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 42 transitions, 146 flow. Second operand has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:42,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:35:42,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 270 [2023-08-04 00:35:42,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:35:46,378 INFO L124 PetriNetUnfolderBase]: 24858/34845 cut-off events. [2023-08-04 00:35:46,379 INFO L125 PetriNetUnfolderBase]: For 3866/3866 co-relation queries the response was YES. [2023-08-04 00:35:46,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72382 conditions, 34845 events. 24858/34845 cut-off events. For 3866/3866 co-relation queries the response was YES. Maximal size of possible extension queue 1291. Compared 213891 event pairs, 1818 based on Foata normal form. 4096/38685 useless extension candidates. Maximal degree in co-relation 28337. Up to 24320 conditions per place. [2023-08-04 00:35:46,495 INFO L140 encePairwiseOnDemand]: 268/270 looper letters, 0 selfloop transitions, 0 changer transitions 68/68 dead transitions. [2023-08-04 00:35:46,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 318 flow [2023-08-04 00:35:46,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:35:46,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:35:46,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 628 transitions. [2023-08-04 00:35:46,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5814814814814815 [2023-08-04 00:35:46,498 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 628 transitions. [2023-08-04 00:35:46,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 628 transitions. [2023-08-04 00:35:46,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:35:46,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 628 transitions. [2023-08-04 00:35:46,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:46,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:46,502 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:46,502 INFO L175 Difference]: Start difference. First operand has 66 places, 42 transitions, 146 flow. Second operand 4 states and 628 transitions. [2023-08-04 00:35:46,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 318 flow [2023-08-04 00:35:46,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 68 transitions, 311 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:35:46,746 INFO L231 Difference]: Finished difference. Result has 64 places, 0 transitions, 0 flow [2023-08-04 00:35:46,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=64, PETRI_TRANSITIONS=0} [2023-08-04 00:35:46,746 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 9 predicate places. [2023-08-04 00:35:46,747 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 0 transitions, 0 flow [2023-08-04 00:35:46,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 145.75) internal successors, (583), 4 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:46,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:35:46,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:35:46,747 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:35:46,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-04 00:35:46,748 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:35:46,748 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:35:46,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:35:46,884 INFO L124 PetriNetUnfolderBase]: 93/1391 cut-off events. [2023-08-04 00:35:46,885 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:35:46,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 1391 events. 93/1391 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9476 event pairs, 0 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 1014. Up to 54 conditions per place. [2023-08-04 00:35:46,890 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 00:35:46,893 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 153 transitions, 330 flow [2023-08-04 00:35:46,893 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:35:46,893 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-04 00:35:46,893 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-04 00:35:46,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 153 transitions, 330 flow [2023-08-04 00:35:46,995 INFO L124 PetriNetUnfolderBase]: 66/1054 cut-off events. [2023-08-04 00:35:46,995 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:35:46,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 1054 events. 66/1054 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6542 event pairs, 0 based on Foata normal form. 0/949 useless extension candidates. Maximal degree in co-relation 786. Up to 54 conditions per place. [2023-08-04 00:35:47,015 INFO L119 LiptonReduction]: Number of co-enabled transitions 4592 [2023-08-04 00:35:53,783 INFO L134 LiptonReduction]: Checked pairs total: 14868 [2023-08-04 00:35:53,783 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-04 00:35:53,784 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:35:53,785 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;@58faadf7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:35:53,785 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:35:53,789 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:35:53,789 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 00:35:53,789 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 00:35:53,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:35:53,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:35:53,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:35:53,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:35:53,790 INFO L85 PathProgramCache]: Analyzing trace with hash -809853677, now seen corresponding path program 1 times [2023-08-04 00:35:53,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:35:53,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400860440] [2023-08-04 00:35:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:35:53,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:35:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:35:53,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:35:53,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:35:53,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400860440] [2023-08-04 00:35:53,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400860440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:35:53,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:35:53,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:35:53,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082483067] [2023-08-04 00:35:53,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:35:53,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:35:53,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:35:53,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:35:53,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:35:53,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 00:35:53,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:35:53,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:35:53,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 00:35:53,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:36:25,545 INFO L124 PetriNetUnfolderBase]: 203175/271218 cut-off events. [2023-08-04 00:36:25,545 INFO L125 PetriNetUnfolderBase]: For 5424/5424 co-relation queries the response was YES. [2023-08-04 00:36:26,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 534377 conditions, 271218 events. 203175/271218 cut-off events. For 5424/5424 co-relation queries the response was YES. Maximal size of possible extension queue 6807. Compared 1848820 event pairs, 162828 based on Foata normal form. 0/259618 useless extension candidates. Maximal degree in co-relation 115473. Up to 256972 conditions per place. [2023-08-04 00:36:27,070 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 39 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-04 00:36:27,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 48 transitions, 202 flow [2023-08-04 00:36:27,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:36:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:36:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-04 00:36:27,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512367491166078 [2023-08-04 00:36:27,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-04 00:36:27,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-04 00:36:27,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:36:27,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-04 00:36:27,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:27,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:27,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:27,075 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 110 flow. Second operand 3 states and 468 transitions. [2023-08-04 00:36:27,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 48 transitions, 202 flow [2023-08-04 00:36:27,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 48 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:36:27,077 INFO L231 Difference]: Finished difference. Result has 59 places, 44 transitions, 122 flow [2023-08-04 00:36:27,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=59, PETRI_TRANSITIONS=44} [2023-08-04 00:36:27,078 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-04 00:36:27,078 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 44 transitions, 122 flow [2023-08-04 00:36:27,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:27,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:36:27,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:36:27,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 00:36:27,079 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:36:27,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:36:27,080 INFO L85 PathProgramCache]: Analyzing trace with hash 696125472, now seen corresponding path program 1 times [2023-08-04 00:36:27,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:36:27,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973826356] [2023-08-04 00:36:27,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:36:27,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:36:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:36:27,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:36:27,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:36:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973826356] [2023-08-04 00:36:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973826356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:36:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126367126] [2023-08-04 00:36:27,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:36:27,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:36:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:36:27,137 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:36:27,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:36:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:36:27,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:36:27,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:36:27,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:36:27,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:36:27,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126367126] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:36:27,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:36:27,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:36:27,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374678915] [2023-08-04 00:36:27,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:36:27,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:36:27,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:36:27,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:36:27,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:36:27,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 00:36:27,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 44 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:27,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:36:27,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 00:36:27,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:36:58,049 INFO L124 PetriNetUnfolderBase]: 196860/261807 cut-off events. [2023-08-04 00:36:58,050 INFO L125 PetriNetUnfolderBase]: For 4845/4845 co-relation queries the response was YES. [2023-08-04 00:36:58,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515918 conditions, 261807 events. 196860/261807 cut-off events. For 4845/4845 co-relation queries the response was YES. Maximal size of possible extension queue 6692. Compared 1770413 event pairs, 158358 based on Foata normal form. 0/251887 useless extension candidates. Maximal degree in co-relation 515876. Up to 247881 conditions per place. [2023-08-04 00:36:59,639 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 46 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 00:36:59,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 55 transitions, 240 flow [2023-08-04 00:36:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:36:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:36:59,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-04 00:36:59,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558303886925795 [2023-08-04 00:36:59,641 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-04 00:36:59,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-04 00:36:59,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:36:59,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-04 00:36:59,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:59,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:59,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:59,645 INFO L175 Difference]: Start difference. First operand has 59 places, 44 transitions, 122 flow. Second operand 3 states and 474 transitions. [2023-08-04 00:36:59,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 55 transitions, 240 flow [2023-08-04 00:36:59,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:36:59,646 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 132 flow [2023-08-04 00:36:59,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=132, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-04 00:36:59,647 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 5 predicate places. [2023-08-04 00:36:59,647 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 132 flow [2023-08-04 00:36:59,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:36:59,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:36:59,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:36:59,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:36:59,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:36:59,857 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:36:59,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:36:59,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1349895259, now seen corresponding path program 1 times [2023-08-04 00:36:59,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:36:59,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487013686] [2023-08-04 00:36:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:36:59,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:36:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:36:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:36:59,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:36:59,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487013686] [2023-08-04 00:36:59,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487013686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:36:59,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680136154] [2023-08-04 00:36:59,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:36:59,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:36:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:36:59,924 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) [2023-08-04 00:36:59,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 00:37:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:37:00,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:37:00,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:37:00,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 00:37:00,076 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:37:00,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680136154] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:37:00,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:37:00,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:37:00,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164979218] [2023-08-04 00:37:00,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:37:00,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:37:00,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:37:00,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:37:00,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:37:00,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 00:37:00,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 132 flow. Second operand has 3 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) [2023-08-04 00:37:00,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:37:00,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 00:37:00,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand