/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_mix042.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:42:41,957 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:42:42,015 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:42:42,018 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:42:42,019 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:42:42,019 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:42:42,019 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:42:42,040 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:42:42,040 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:42:42,043 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:42:42,044 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:42:42,044 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:42:42,045 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:42:42,046 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:42:42,046 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:42:42,046 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:42:42,046 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:42:42,046 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:42:42,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:42:42,047 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:42:42,047 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:42:42,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:42:42,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:42:42,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:42:42,048 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:42:42,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:42:42,049 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:42:42,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:42:42,049 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:42:42,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:42:42,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:42:42,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:42:42,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:42:42,050 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:42:42,051 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:42:42,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:42:42,051 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:42:42,051 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:42:42,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:42:42,051 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:42:42,051 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:42:42,051 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:42:42,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:42:42,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:42:42,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:42:42,224 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:42:42,224 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:42:42,225 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix042.oepc_bound2.i [2023-08-03 23:42:43,074 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:42:43,315 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:42:43,316 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix042.oepc_bound2.i [2023-08-03 23:42:43,325 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5861663a6/748ba1633edf438898d4f4ce413dd238/FLAG0fdf55fa9 [2023-08-03 23:42:43,695 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5861663a6/748ba1633edf438898d4f4ce413dd238 [2023-08-03 23:42:43,697 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:42:43,697 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:42:43,698 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:42:43,698 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:42:43,700 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:42:43,700 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:42:43" (1/1) ... [2023-08-03 23:42:43,701 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4360e579 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:43, skipping insertion in model container [2023-08-03 23:42:43,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:42:43" (1/1) ... [2023-08-03 23:42:43,727 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:42:43,841 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_mix042.oepc_bound2.i[945,958] [2023-08-03 23:42:44,004 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:42:44,010 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:42:44,024 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_mix042.oepc_bound2.i[945,958] [2023-08-03 23:42:44,037 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:42:44,038 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:42:44,080 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:42:44,110 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:42:44,110 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:42:44,115 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:42:44,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44 WrapperNode [2023-08-03 23:42:44,115 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:42:44,116 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:42:44,116 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:42:44,116 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:42:44,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44" (1/1) ... [2023-08-03 23:42:44,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44" (1/1) ... [2023-08-03 23:42:44,156 INFO L138 Inliner]: procedures = 176, calls = 58, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 154 [2023-08-03 23:42:44,156 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:42:44,156 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:42:44,156 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:42:44,156 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:42:44,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44" (1/1) ... [2023-08-03 23:42:44,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44" (1/1) ... [2023-08-03 23:42:44,168 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44" (1/1) ... [2023-08-03 23:42:44,168 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44" (1/1) ... [2023-08-03 23:42:44,174 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44" (1/1) ... [2023-08-03 23:42:44,176 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44" (1/1) ... [2023-08-03 23:42:44,177 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44" (1/1) ... [2023-08-03 23:42:44,178 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44" (1/1) ... [2023-08-03 23:42:44,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:42:44,180 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:42:44,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:42:44,181 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:42:44,181 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44" (1/1) ... [2023-08-03 23:42:44,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:42:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:42:44,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 23:42:44,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 23:42:44,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:42:44,232 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:42:44,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:42:44,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:42:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:42:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:42:44,233 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:42:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:42:44,233 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:42:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:42:44,233 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:42:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:42:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:42:44,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:42:44,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:42:44,234 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:42:44,324 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:42:44,326 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:42:44,529 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:42:44,603 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:42:44,604 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:42:44,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:42:44 BoogieIcfgContainer [2023-08-03 23:42:44,605 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:42:44,606 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:42:44,607 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:42:44,608 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:42:44,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:42:43" (1/3) ... [2023-08-03 23:42:44,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c75b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:42:44, skipping insertion in model container [2023-08-03 23:42:44,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:44" (2/3) ... [2023-08-03 23:42:44,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c75b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:42:44, skipping insertion in model container [2023-08-03 23:42:44,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:42:44" (3/3) ... [2023-08-03 23:42:44,610 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix042.oepc_bound2.i [2023-08-03 23:42:44,615 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:42:44,620 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:42:44,621 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:42:44,621 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:42:44,653 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:42:44,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 133 transitions, 281 flow [2023-08-03 23:42:44,786 INFO L124 PetriNetUnfolderBase]: 30/458 cut-off events. [2023-08-03 23:42:44,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:42:44,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 483 conditions, 458 events. 30/458 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2034 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 271. Up to 16 conditions per place. [2023-08-03 23:42:44,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 133 transitions, 281 flow [2023-08-03 23:42:44,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 104 transitions, 223 flow [2023-08-03 23:42:44,802 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:42:44,808 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 104 transitions, 223 flow [2023-08-03 23:42:44,809 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 104 transitions, 223 flow [2023-08-03 23:42:44,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 104 transitions, 223 flow [2023-08-03 23:42:44,831 INFO L124 PetriNetUnfolderBase]: 6/226 cut-off events. [2023-08-03 23:42:44,831 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:42:44,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 226 events. 6/226 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 680 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-03 23:42:44,833 INFO L119 LiptonReduction]: Number of co-enabled transitions 1552 [2023-08-03 23:42:47,221 INFO L134 LiptonReduction]: Checked pairs total: 3595 [2023-08-03 23:42:47,221 INFO L136 LiptonReduction]: Total number of compositions: 83 [2023-08-03 23:42:47,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:42:47,234 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;@339c5fa8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:42:47,234 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:42:47,239 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:42:47,239 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-03 23:42:47,239 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:42:47,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:42:47,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:42:47,240 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:42:47,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:42:47,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1045139569, now seen corresponding path program 1 times [2023-08-03 23:42:47,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:42:47,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614085425] [2023-08-03 23:42:47,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:47,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:42:47,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:42:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:42:47,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:42:47,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614085425] [2023-08-03 23:42:47,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614085425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:42:47,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:42:47,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:42:47,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113831408] [2023-08-03 23:42:47,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:42:47,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:42:47,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:42:47,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:42:47,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:42:47,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 216 [2023-08-03 23:42:47,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:47,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:42:47,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 216 [2023-08-03 23:42:47,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:42:47,595 INFO L124 PetriNetUnfolderBase]: 579/997 cut-off events. [2023-08-03 23:42:47,595 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-03 23:42:47,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 997 events. 579/997 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4651 event pairs, 295 based on Foata normal form. 0/885 useless extension candidates. Maximal degree in co-relation 2012. Up to 935 conditions per place. [2023-08-03 23:42:47,600 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 25 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 23:42:47,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 133 flow [2023-08-03 23:42:47,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:42:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:42:47,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-03 23:42:47,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.566358024691358 [2023-08-03 23:42:47,610 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-03 23:42:47,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-03 23:42:47,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:42:47,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-03 23:42:47,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:47,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:47,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:47,620 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 69 flow. Second operand 3 states and 367 transitions. [2023-08-03 23:42:47,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 133 flow [2023-08-03 23:42:47,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:42:47,623 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 77 flow [2023-08-03 23:42:47,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-03 23:42:47,626 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-03 23:42:47,626 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 77 flow [2023-08-03 23:42:47,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:47,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:42:47,626 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:42:47,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:42:47,626 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:42:47,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:42:47,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1049177224, now seen corresponding path program 1 times [2023-08-03 23:42:47,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:42:47,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432982417] [2023-08-03 23:42:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:47,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:42:47,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:42:47,641 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:42:47,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:42:47,660 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:42:47,660 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:42:47,661 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:42:47,662 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:42:47,663 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:42:47,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:42:47,663 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 23:42:47,664 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:42:47,665 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:42:47,665 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:42:47,685 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:42:47,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 160 transitions, 356 flow [2023-08-03 23:42:47,793 INFO L124 PetriNetUnfolderBase]: 93/1415 cut-off events. [2023-08-03 23:42:47,794 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:42:47,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1513 conditions, 1415 events. 93/1415 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9816 event pairs, 0 based on Foata normal form. 0/1254 useless extension candidates. Maximal degree in co-relation 1020. Up to 54 conditions per place. [2023-08-03 23:42:47,798 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 160 transitions, 356 flow [2023-08-03 23:42:47,800 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 142 places, 131 transitions, 298 flow [2023-08-03 23:42:47,800 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:42:47,800 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 142 places, 131 transitions, 298 flow [2023-08-03 23:42:47,801 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 142 places, 131 transitions, 298 flow [2023-08-03 23:42:47,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 131 transitions, 298 flow [2023-08-03 23:42:47,847 INFO L124 PetriNetUnfolderBase]: 12/632 cut-off events. [2023-08-03 23:42:47,847 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:42:47,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 632 events. 12/632 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3324 event pairs, 0 based on Foata normal form. 0/606 useless extension candidates. Maximal degree in co-relation 498. Up to 27 conditions per place. [2023-08-03 23:42:47,856 INFO L119 LiptonReduction]: Number of co-enabled transitions 4396 [2023-08-03 23:42:50,293 INFO L134 LiptonReduction]: Checked pairs total: 16083 [2023-08-03 23:42:50,293 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-08-03 23:42:50,295 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:42:50,296 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;@339c5fa8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:42:50,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:42:50,307 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:42:50,308 INFO L124 PetriNetUnfolderBase]: 0/68 cut-off events. [2023-08-03 23:42:50,308 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 23:42:50,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:42:50,308 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:42:50,308 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:42:50,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:42:50,309 INFO L85 PathProgramCache]: Analyzing trace with hash -487915913, now seen corresponding path program 1 times [2023-08-03 23:42:50,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:42:50,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757868341] [2023-08-03 23:42:50,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:50,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:42:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:42:50,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:42:50,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:42:50,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757868341] [2023-08-03 23:42:50,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757868341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:42:50,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:42:50,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:42:50,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056965378] [2023-08-03 23:42:50,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:42:50,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:42:50,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:42:50,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:42:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:42:50,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 248 [2023-08-03 23:42:50,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:50,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:42:50,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 248 [2023-08-03 23:42:50,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:43:06,933 INFO L124 PetriNetUnfolderBase]: 150910/200449 cut-off events. [2023-08-03 23:43:06,933 INFO L125 PetriNetUnfolderBase]: For 10735/10735 co-relation queries the response was YES. [2023-08-03 23:43:07,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404346 conditions, 200449 events. 150910/200449 cut-off events. For 10735/10735 co-relation queries the response was YES. Maximal size of possible extension queue 5762. Compared 1373046 event pairs, 118610 based on Foata normal form. 0/181213 useless extension candidates. Maximal degree in co-relation 85325. Up to 191286 conditions per place. [2023-08-03 23:43:08,094 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 40 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-08-03 23:43:08,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 56 transitions, 232 flow [2023-08-03 23:43:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:43:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:43:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-08-03 23:43:08,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5860215053763441 [2023-08-03 23:43:08,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-08-03 23:43:08,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-08-03 23:43:08,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:43:08,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-08-03 23:43:08,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:08,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:08,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:08,105 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 136 flow. Second operand 3 states and 436 transitions. [2023-08-03 23:43:08,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 56 transitions, 232 flow [2023-08-03 23:43:08,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 56 transitions, 226 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:43:08,116 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 142 flow [2023-08-03 23:43:08,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2023-08-03 23:43:08,117 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-03 23:43:08,118 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 142 flow [2023-08-03 23:43:08,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:08,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:43:08,118 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:43:08,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:43:08,118 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:43:08,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:43:08,119 INFO L85 PathProgramCache]: Analyzing trace with hash -373854074, now seen corresponding path program 1 times [2023-08-03 23:43:08,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:43:08,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844776512] [2023-08-03 23:43:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:43:08,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:43:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:43:08,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:43:08,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:43:08,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844776512] [2023-08-03 23:43:08,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844776512] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:43:08,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662990062] [2023-08-03 23:43:08,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:43:08,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:43:08,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:43:08,229 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:43:08,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:43:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:43:08,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:43:08,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:43:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:43:08,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:43:08,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662990062] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:43:08,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:43:08,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:43:08,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740295333] [2023-08-03 23:43:08,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:43:08,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:43:08,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:43:08,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:43:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:43:08,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 248 [2023-08-03 23:43:08,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:08,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:43:08,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 248 [2023-08-03 23:43:08,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:43:24,131 INFO L124 PetriNetUnfolderBase]: 150870/200479 cut-off events. [2023-08-03 23:43:24,131 INFO L125 PetriNetUnfolderBase]: For 9965/9965 co-relation queries the response was YES. [2023-08-03 23:43:24,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403649 conditions, 200479 events. 150870/200479 cut-off events. For 9965/9965 co-relation queries the response was YES. Maximal size of possible extension queue 5761. Compared 1375142 event pairs, 91710 based on Foata normal form. 25/181298 useless extension candidates. Maximal degree in co-relation 100088. Up to 191157 conditions per place. [2023-08-03 23:43:25,288 INFO L140 encePairwiseOnDemand]: 244/248 looper letters, 47 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-03 23:43:25,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 270 flow [2023-08-03 23:43:25,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:43:25,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:43:25,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 702 transitions. [2023-08-03 23:43:25,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661290322580645 [2023-08-03 23:43:25,290 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 702 transitions. [2023-08-03 23:43:25,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 702 transitions. [2023-08-03 23:43:25,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:43:25,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 702 transitions. [2023-08-03 23:43:25,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 140.4) internal successors, (702), 5 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:25,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:25,294 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:25,294 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 142 flow. Second operand 5 states and 702 transitions. [2023-08-03 23:43:25,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 270 flow [2023-08-03 23:43:25,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 64 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:43:25,296 INFO L231 Difference]: Finished difference. Result has 69 places, 51 transitions, 156 flow [2023-08-03 23:43:25,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=69, PETRI_TRANSITIONS=51} [2023-08-03 23:43:25,296 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 6 predicate places. [2023-08-03 23:43:25,296 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 51 transitions, 156 flow [2023-08-03 23:43:25,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.6) internal successors, (658), 5 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:25,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:43:25,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:43:25,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:43:25,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:43:25,501 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:43:25,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:43:25,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1191940912, now seen corresponding path program 1 times [2023-08-03 23:43:25,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:43:25,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166838355] [2023-08-03 23:43:25,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:43:25,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:43:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:43:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:43:25,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:43:25,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166838355] [2023-08-03 23:43:25,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166838355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:43:25,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495267584] [2023-08-03 23:43:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:43:25,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:43:25,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:43:25,584 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:43:25,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:43:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:43:25,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:43:25,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:43:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:43:25,667 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:43:25,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495267584] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:43:25,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:43:25,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:43:25,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069746543] [2023-08-03 23:43:25,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:43:25,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:43:25,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:43:25,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:43:25,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:43:25,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 248 [2023-08-03 23:43:25,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 51 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:25,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:43:25,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 248 [2023-08-03 23:43:25,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:43:41,605 INFO L124 PetriNetUnfolderBase]: 146266/198071 cut-off events. [2023-08-03 23:43:41,605 INFO L125 PetriNetUnfolderBase]: For 9275/9275 co-relation queries the response was YES. [2023-08-03 23:43:42,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395230 conditions, 198071 events. 146266/198071 cut-off events. For 9275/9275 co-relation queries the response was YES. Maximal size of possible extension queue 5937. Compared 1416679 event pairs, 117292 based on Foata normal form. 0/179596 useless extension candidates. Maximal degree in co-relation 127439. Up to 184350 conditions per place. [2023-08-03 23:43:42,946 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 48 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-03 23:43:42,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 64 transitions, 284 flow [2023-08-03 23:43:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:43:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:43:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-03 23:43:42,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5954301075268817 [2023-08-03 23:43:42,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-03 23:43:42,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-03 23:43:42,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:43:42,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-03 23:43:42,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:42,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:42,951 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:42,951 INFO L175 Difference]: Start difference. First operand has 69 places, 51 transitions, 156 flow. Second operand 3 states and 443 transitions. [2023-08-03 23:43:42,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 64 transitions, 284 flow [2023-08-03 23:43:42,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 64 transitions, 277 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:43:42,952 INFO L231 Difference]: Finished difference. Result has 70 places, 52 transitions, 164 flow [2023-08-03 23:43:42,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=70, PETRI_TRANSITIONS=52} [2023-08-03 23:43:42,953 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-03 23:43:42,953 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 52 transitions, 164 flow [2023-08-03 23:43:42,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:42,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:43:42,954 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:43:42,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:43:43,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:43:43,159 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:43:43,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:43:43,159 INFO L85 PathProgramCache]: Analyzing trace with hash -622843462, now seen corresponding path program 1 times [2023-08-03 23:43:43,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:43:43,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274617185] [2023-08-03 23:43:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:43:43,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:43:43,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:43:43,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:43:43,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:43:43,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274617185] [2023-08-03 23:43:43,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274617185] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:43:43,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652106610] [2023-08-03 23:43:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:43:43,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:43:43,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:43:43,241 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:43:43,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:43:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:43:43,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:43:43,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:43:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:43:43,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:43:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:43:43,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652106610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:43:43,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:43:43,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:43:43,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380210868] [2023-08-03 23:43:43,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:43:43,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:43:43,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:43:43,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:43:43,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:43:43,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 248 [2023-08-03 23:43:43,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 52 transitions, 164 flow. Second operand has 5 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:43,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:43:43,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 248 [2023-08-03 23:43:43,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:43:56,808 INFO L124 PetriNetUnfolderBase]: 126173/169352 cut-off events. [2023-08-03 23:43:56,809 INFO L125 PetriNetUnfolderBase]: For 8780/8780 co-relation queries the response was YES. [2023-08-03 23:43:57,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339038 conditions, 169352 events. 126173/169352 cut-off events. For 8780/8780 co-relation queries the response was YES. Maximal size of possible extension queue 5235. Compared 1166137 event pairs, 74825 based on Foata normal form. 5/153389 useless extension candidates. Maximal degree in co-relation 83194. Up to 158221 conditions per place. [2023-08-03 23:43:58,024 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 48 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-03 23:43:58,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 64 transitions, 285 flow [2023-08-03 23:43:58,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:43:58,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:43:58,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 571 transitions. [2023-08-03 23:43:58,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756048387096774 [2023-08-03 23:43:58,027 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 571 transitions. [2023-08-03 23:43:58,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 571 transitions. [2023-08-03 23:43:58,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:43:58,027 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 571 transitions. [2023-08-03 23:43:58,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.75) internal successors, (571), 4 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:58,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:58,046 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:58,046 INFO L175 Difference]: Start difference. First operand has 70 places, 52 transitions, 164 flow. Second operand 4 states and 571 transitions. [2023-08-03 23:43:58,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 64 transitions, 285 flow [2023-08-03 23:43:58,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 64 transitions, 283 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:43:58,059 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 159 flow [2023-08-03 23:43:58,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2023-08-03 23:43:58,060 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-03 23:43:58,060 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 159 flow [2023-08-03 23:43:58,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:58,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:43:58,060 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:43:58,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 23:43:58,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:43:58,261 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:43:58,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:43:58,261 INFO L85 PathProgramCache]: Analyzing trace with hash 2038921970, now seen corresponding path program 1 times [2023-08-03 23:43:58,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:43:58,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379796411] [2023-08-03 23:43:58,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:43:58,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:43:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:43:58,336 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:43:58,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:43:58,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379796411] [2023-08-03 23:43:58,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379796411] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:43:58,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850672266] [2023-08-03 23:43:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:43:58,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:43:58,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:43:58,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:43:58,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:43:58,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:43:58,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:43:58,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:43:58,453 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:43:58,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:43:58,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850672266] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:43:58,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:43:58,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:43:58,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650486570] [2023-08-03 23:43:58,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:43:58,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:43:58,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:43:58,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:43:58,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:43:58,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 248 [2023-08-03 23:43:58,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 51 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:43:58,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:43:58,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 248 [2023-08-03 23:43:58,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:44:12,097 INFO L124 PetriNetUnfolderBase]: 124933/168418 cut-off events. [2023-08-03 23:44:12,098 INFO L125 PetriNetUnfolderBase]: For 7418/7418 co-relation queries the response was YES. [2023-08-03 23:44:12,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336620 conditions, 168418 events. 124933/168418 cut-off events. For 7418/7418 co-relation queries the response was YES. Maximal size of possible extension queue 5328. Compared 1175012 event pairs, 32068 based on Foata normal form. 400/153110 useless extension candidates. Maximal degree in co-relation 126993. Up to 154115 conditions per place. [2023-08-03 23:44:13,311 INFO L140 encePairwiseOnDemand]: 244/248 looper letters, 69 selfloop transitions, 4 changer transitions 0/85 dead transitions. [2023-08-03 23:44:13,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 85 transitions, 373 flow [2023-08-03 23:44:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:44:13,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:44:13,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 723 transitions. [2023-08-03 23:44:13,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5830645161290322 [2023-08-03 23:44:13,313 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 723 transitions. [2023-08-03 23:44:13,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 723 transitions. [2023-08-03 23:44:13,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:44:13,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 723 transitions. [2023-08-03 23:44:13,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:13,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:13,317 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 248.0) internal successors, (1488), 6 states have internal predecessors, (1488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:13,317 INFO L175 Difference]: Start difference. First operand has 72 places, 51 transitions, 159 flow. Second operand 5 states and 723 transitions. [2023-08-03 23:44:13,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 85 transitions, 373 flow [2023-08-03 23:44:13,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 366 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:44:13,321 INFO L231 Difference]: Finished difference. Result has 73 places, 51 transitions, 169 flow [2023-08-03 23:44:13,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=73, PETRI_TRANSITIONS=51} [2023-08-03 23:44:13,322 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 10 predicate places. [2023-08-03 23:44:13,322 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 51 transitions, 169 flow [2023-08-03 23:44:13,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 132.6) internal successors, (663), 5 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:13,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:44:13,323 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:44:13,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 23:44:13,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:44:13,526 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:44:13,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:44:13,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1179850997, now seen corresponding path program 1 times [2023-08-03 23:44:13,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:44:13,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883004563] [2023-08-03 23:44:13,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:44:13,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:44:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:44:13,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:44:13,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:44:13,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883004563] [2023-08-03 23:44:13,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883004563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:44:13,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941699013] [2023-08-03 23:44:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:44:13,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:44:13,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:44:13,575 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:44:13,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:44:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:44:13,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:44:13,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:44:13,671 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:44:13,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:44:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:44:13,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941699013] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:44:13,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:44:13,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:44:13,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279081090] [2023-08-03 23:44:13,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:44:13,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:44:13,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:44:13,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:44:13,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:44:13,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 248 [2023-08-03 23:44:13,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 51 transitions, 169 flow. Second operand has 5 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:13,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:44:13,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 248 [2023-08-03 23:44:13,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:44:24,760 INFO L124 PetriNetUnfolderBase]: 104198/139283 cut-off events. [2023-08-03 23:44:24,760 INFO L125 PetriNetUnfolderBase]: For 8760/8760 co-relation queries the response was YES. [2023-08-03 23:44:25,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279970 conditions, 139283 events. 104198/139283 cut-off events. For 8760/8760 co-relation queries the response was YES. Maximal size of possible extension queue 4678. Compared 933771 event pairs, 65348 based on Foata normal form. 100/127915 useless extension candidates. Maximal degree in co-relation 105799. Up to 127416 conditions per place. [2023-08-03 23:44:26,016 INFO L140 encePairwiseOnDemand]: 245/248 looper letters, 61 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2023-08-03 23:44:26,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 76 transitions, 343 flow [2023-08-03 23:44:26,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:44:26,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:44:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 584 transitions. [2023-08-03 23:44:26,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5887096774193549 [2023-08-03 23:44:26,018 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 584 transitions. [2023-08-03 23:44:26,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 584 transitions. [2023-08-03 23:44:26,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:44:26,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 584 transitions. [2023-08-03 23:44:26,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:26,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:26,046 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:26,046 INFO L175 Difference]: Start difference. First operand has 73 places, 51 transitions, 169 flow. Second operand 4 states and 584 transitions. [2023-08-03 23:44:26,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 76 transitions, 343 flow [2023-08-03 23:44:26,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 338 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:44:26,049 INFO L231 Difference]: Finished difference. Result has 74 places, 50 transitions, 162 flow [2023-08-03 23:44:26,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=74, PETRI_TRANSITIONS=50} [2023-08-03 23:44:26,050 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 11 predicate places. [2023-08-03 23:44:26,051 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 50 transitions, 162 flow [2023-08-03 23:44:26,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 133.4) internal successors, (667), 5 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:26,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:44:26,051 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:44:26,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 23:44:26,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:44:26,255 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:44:26,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:44:26,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1537514319, now seen corresponding path program 1 times [2023-08-03 23:44:26,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:44:26,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665925858] [2023-08-03 23:44:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:44:26,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:44:26,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:44:26,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:44:26,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:44:26,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665925858] [2023-08-03 23:44:26,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665925858] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:44:26,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:44:26,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 23:44:26,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063692785] [2023-08-03 23:44:26,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:44:26,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:44:26,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:44:26,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:44:26,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 23:44:26,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 248 [2023-08-03 23:44:26,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 50 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:26,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:44:26,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 248 [2023-08-03 23:44:26,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:44:32,492 INFO L124 PetriNetUnfolderBase]: 57198/78008 cut-off events. [2023-08-03 23:44:32,492 INFO L125 PetriNetUnfolderBase]: For 8855/8855 co-relation queries the response was YES. [2023-08-03 23:44:32,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160595 conditions, 78008 events. 57198/78008 cut-off events. For 8855/8855 co-relation queries the response was YES. Maximal size of possible extension queue 2627. Compared 505437 event pairs, 8958 based on Foata normal form. 10000/81340 useless extension candidates. Maximal degree in co-relation 60449. Up to 58800 conditions per place. [2023-08-03 23:44:32,759 INFO L140 encePairwiseOnDemand]: 246/248 looper letters, 0 selfloop transitions, 0 changer transitions 81/81 dead transitions. [2023-08-03 23:44:32,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 81 transitions, 362 flow [2023-08-03 23:44:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:44:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:44:32,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 593 transitions. [2023-08-03 23:44:32,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977822580645161 [2023-08-03 23:44:32,762 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 593 transitions. [2023-08-03 23:44:32,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 593 transitions. [2023-08-03 23:44:32,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:44:32,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 593 transitions. [2023-08-03 23:44:32,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 148.25) internal successors, (593), 4 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:32,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:32,764 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 248.0) internal successors, (1240), 5 states have internal predecessors, (1240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:32,764 INFO L175 Difference]: Start difference. First operand has 74 places, 50 transitions, 162 flow. Second operand 4 states and 593 transitions. [2023-08-03 23:44:32,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 81 transitions, 362 flow [2023-08-03 23:44:33,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 81 transitions, 355 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:44:33,132 INFO L231 Difference]: Finished difference. Result has 72 places, 0 transitions, 0 flow [2023-08-03 23:44:33,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=72, PETRI_TRANSITIONS=0} [2023-08-03 23:44:33,133 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-03 23:44:33,133 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 0 transitions, 0 flow [2023-08-03 23:44:33,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.75) internal successors, (539), 4 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:33,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:44:33,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:44:33,134 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:44:33,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 23:44:33,134 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:44:33,134 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:44:33,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 160 transitions, 356 flow [2023-08-03 23:44:33,208 INFO L124 PetriNetUnfolderBase]: 93/1415 cut-off events. [2023-08-03 23:44:33,208 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:44:33,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1513 conditions, 1415 events. 93/1415 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9816 event pairs, 0 based on Foata normal form. 0/1254 useless extension candidates. Maximal degree in co-relation 1020. Up to 54 conditions per place. [2023-08-03 23:44:33,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 160 transitions, 356 flow [2023-08-03 23:44:33,212 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 160 transitions, 356 flow [2023-08-03 23:44:33,213 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:44:33,213 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 160 transitions, 356 flow [2023-08-03 23:44:33,213 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 160 transitions, 356 flow [2023-08-03 23:44:33,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 160 transitions, 356 flow [2023-08-03 23:44:33,283 INFO L124 PetriNetUnfolderBase]: 93/1415 cut-off events. [2023-08-03 23:44:33,283 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:44:33,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1513 conditions, 1415 events. 93/1415 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 9816 event pairs, 0 based on Foata normal form. 0/1254 useless extension candidates. Maximal degree in co-relation 1020. Up to 54 conditions per place. [2023-08-03 23:44:33,298 INFO L119 LiptonReduction]: Number of co-enabled transitions 7180 [2023-08-03 23:44:36,177 INFO L134 LiptonReduction]: Checked pairs total: 23063 [2023-08-03 23:44:36,177 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-03 23:44:36,179 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:44:36,179 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;@339c5fa8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:44:36,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:44:36,181 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:44:36,181 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2023-08-03 23:44:36,181 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:44:36,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:44:36,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 23:44:36,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:44:36,181 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:44:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash 28860295, now seen corresponding path program 1 times [2023-08-03 23:44:36,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:44:36,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604391177] [2023-08-03 23:44:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:44:36,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:44:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:44:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:44:36,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:44:36,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604391177] [2023-08-03 23:44:36,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604391177] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:44:36,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:44:36,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 23:44:36,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85289673] [2023-08-03 23:44:36,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:44:36,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:44:36,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:44:36,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:44:36,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:44:36,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 279 [2023-08-03 23:44:36,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:44:36,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:44:36,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 279 [2023-08-03 23:44:36,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:45:27,223 INFO L124 PetriNetUnfolderBase]: 490490/645487 cut-off events. [2023-08-03 23:45:27,224 INFO L125 PetriNetUnfolderBase]: For 9530/9530 co-relation queries the response was YES. [2023-08-03 23:45:29,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1270568 conditions, 645487 events. 490490/645487 cut-off events. For 9530/9530 co-relation queries the response was YES. Maximal size of possible extension queue 17008. Compared 4884057 event pairs, 81596 based on Foata normal form. 0/573902 useless extension candidates. Maximal degree in co-relation 1069526. Up to 565329 conditions per place. [2023-08-03 23:45:31,410 INFO L140 encePairwiseOnDemand]: 273/279 looper letters, 71 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2023-08-03 23:45:31,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 381 flow [2023-08-03 23:45:31,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:45:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:45:31,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-08-03 23:45:31,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5734767025089605 [2023-08-03 23:45:31,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-08-03 23:45:31,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-08-03 23:45:31,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:45:31,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-08-03 23:45:31,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:45:31,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:45:31,414 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:45:31,414 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 148 flow. Second operand 3 states and 480 transitions. [2023-08-03 23:45:31,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 381 flow [2023-08-03 23:45:31,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 88 transitions, 375 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:45:31,420 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 161 flow [2023-08-03 23:45:31,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-08-03 23:45:31,421 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-03 23:45:31,421 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 161 flow [2023-08-03 23:45:31,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:45:31,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:45:31,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:45:31,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 23:45:31,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:45:31,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:45:31,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1984225906, now seen corresponding path program 1 times [2023-08-03 23:45:31,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:45:31,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628345515] [2023-08-03 23:45:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:45:31,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:45:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:45:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:45:31,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:45:31,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628345515] [2023-08-03 23:45:31,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628345515] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:45:31,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:45:31,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:45:31,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210438258] [2023-08-03 23:45:31,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:45:31,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:45:31,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:45:31,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:45:31,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:45:31,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 279 [2023-08-03 23:45:31,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:45:31,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:45:31,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 279 [2023-08-03 23:45:31,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:46:25,076 INFO L124 PetriNetUnfolderBase]: 478628/625372 cut-off events. [2023-08-03 23:46:25,076 INFO L125 PetriNetUnfolderBase]: For 50026/50026 co-relation queries the response was YES. [2023-08-03 23:46:27,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1317525 conditions, 625372 events. 478628/625372 cut-off events. For 50026/50026 co-relation queries the response was YES. Maximal size of possible extension queue 16046. Compared 4484322 event pairs, 400414 based on Foata normal form. 0/552467 useless extension candidates. Maximal degree in co-relation 867566. Up to 598251 conditions per place. [2023-08-03 23:46:29,147 INFO L140 encePairwiseOnDemand]: 276/279 looper letters, 46 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-03 23:46:29,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 62 transitions, 270 flow [2023-08-03 23:46:29,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:46:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:46:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 440 transitions. [2023-08-03 23:46:29,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256869772998806 [2023-08-03 23:46:29,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 440 transitions. [2023-08-03 23:46:29,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 440 transitions. [2023-08-03 23:46:29,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:46:29,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 440 transitions. [2023-08-03 23:46:29,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:46:29,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:46:29,151 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 279.0) internal successors, (1116), 4 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:46:29,151 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 161 flow. Second operand 3 states and 440 transitions. [2023-08-03 23:46:29,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 62 transitions, 270 flow [2023-08-03 23:46:29,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 62 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:46:29,164 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 170 flow [2023-08-03 23:46:29,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=279, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2023-08-03 23:46:29,165 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-08-03 23:46:29,165 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 170 flow [2023-08-03 23:46:29,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:46:29,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:46:29,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:46:29,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 23:46:29,165 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:46:29,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:46:29,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2035703889, now seen corresponding path program 1 times [2023-08-03 23:46:29,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:46:29,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328765471] [2023-08-03 23:46:29,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:46:29,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:46:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:46:29,187 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:46:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:46:29,196 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:46:29,196 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:46:29,196 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-03 23:46:29,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 23:46:29,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-03 23:46:29,196 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 23:46:29,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 23:46:29,197 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-03 23:46:29,197 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-03 23:46:29,199 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 23:46:29,199 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 23:46:29,223 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 11:46:29 BasicIcfg [2023-08-03 23:46:29,223 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 23:46:29,223 INFO L158 Benchmark]: Toolchain (without parser) took 225526.13ms. Allocated memory was 492.8MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 456.4MB in the beginning and 10.7GB in the end (delta: -10.2GB). Peak memory consumption was 5.3GB. Max. memory is 16.0GB. [2023-08-03 23:46:29,224 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 392.2MB. Free memory is still 349.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 23:46:29,224 INFO L158 Benchmark]: CACSL2BoogieTranslator took 417.14ms. Allocated memory is still 492.8MB. Free memory was 456.4MB in the beginning and 432.5MB in the end (delta: 23.9MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-03 23:46:29,224 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.15ms. Allocated memory is still 492.8MB. Free memory was 432.5MB in the beginning and 430.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 23:46:29,224 INFO L158 Benchmark]: Boogie Preprocessor took 23.87ms. Allocated memory is still 492.8MB. Free memory was 430.0MB in the beginning and 427.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 23:46:29,224 INFO L158 Benchmark]: RCFGBuilder took 424.70ms. Allocated memory is still 492.8MB. Free memory was 427.9MB in the beginning and 390.1MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. [2023-08-03 23:46:29,224 INFO L158 Benchmark]: TraceAbstraction took 224616.69ms. Allocated memory was 492.8MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 389.1MB in the beginning and 10.7GB in the end (delta: -10.3GB). Peak memory consumption was 5.2GB. Max. memory is 16.0GB. [2023-08-03 23:46:29,225 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 392.2MB. Free memory is still 349.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 417.14ms. Allocated memory is still 492.8MB. Free memory was 456.4MB in the beginning and 432.5MB in the end (delta: 23.9MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 40.15ms. Allocated memory is still 492.8MB. Free memory was 432.5MB in the beginning and 430.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.87ms. Allocated memory is still 492.8MB. Free memory was 430.0MB in the beginning and 427.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 424.70ms. Allocated memory is still 492.8MB. Free memory was 427.9MB in the beginning and 390.1MB in the end (delta: 37.7MB). Peak memory consumption was 37.7MB. Max. memory is 16.0GB. * TraceAbstraction took 224616.69ms. Allocated memory was 492.8MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 389.1MB in the beginning and 10.7GB in the end (delta: -10.3GB). Peak memory consumption was 5.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.4s, 109 PlacesBefore, 34 PlacesAfterwards, 104 TransitionsBefore, 27 TransitionsAfterwards, 1552 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 83 TotalNumberOfCompositions, 3595 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1811, independent: 1691, independent conditional: 0, independent unconditional: 1691, dependent: 120, dependent conditional: 0, dependent unconditional: 120, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 774, independent: 759, independent conditional: 0, independent unconditional: 759, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1811, independent: 932, independent conditional: 0, independent unconditional: 932, dependent: 105, dependent conditional: 0, dependent unconditional: 105, unknown: 774, unknown conditional: 0, unknown unconditional: 774] , Statistics on independence cache: Total cache size (in pairs): 86, Positive cache size: 78, Positive conditional cache size: 0, Positive unconditional cache size: 78, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 142 PlacesBefore, 63 PlacesAfterwards, 131 TransitionsBefore, 50 TransitionsAfterwards, 4396 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 88 TotalNumberOfCompositions, 16083 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5987, independent: 5673, independent conditional: 0, independent unconditional: 5673, dependent: 314, dependent conditional: 0, dependent unconditional: 314, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2048, independent: 2003, independent conditional: 0, independent unconditional: 2003, dependent: 45, dependent conditional: 0, dependent unconditional: 45, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5987, independent: 3670, independent conditional: 0, independent unconditional: 3670, dependent: 269, dependent conditional: 0, dependent unconditional: 269, unknown: 2048, unknown conditional: 0, unknown unconditional: 2048] , Statistics on independence cache: Total cache size (in pairs): 396, Positive cache size: 373, Positive conditional cache size: 0, Positive unconditional cache size: 373, Negative cache size: 23, Negative conditional cache size: 0, Negative unconditional cache size: 23, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 168 PlacesBefore, 68 PlacesAfterwards, 160 TransitionsBefore, 56 TransitionsAfterwards, 7180 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 60 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 17 ConcurrentYvCompositions, 4 ChoiceCompositions, 119 TotalNumberOfCompositions, 23063 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9772, independent: 9424, independent conditional: 0, independent unconditional: 9424, dependent: 348, dependent conditional: 0, dependent unconditional: 348, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3644, independent: 3569, independent conditional: 0, independent unconditional: 3569, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9772, independent: 5855, independent conditional: 0, independent unconditional: 5855, dependent: 273, dependent conditional: 0, dependent unconditional: 273, unknown: 3644, unknown conditional: 0, unknown unconditional: 3644] , Statistics on independence cache: Total cache size (in pairs): 494, Positive cache size: 462, Positive conditional cache size: 0, Positive unconditional cache size: 462, Negative cache size: 32, Negative conditional cache size: 0, Negative unconditional cache size: 32, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L709] 0 int __unbuffered_cnt = 0; [L711] 0 int __unbuffered_p0_EAX = 0; [L713] 0 int __unbuffered_p2_EAX = 0; [L715] 0 int __unbuffered_p2_EBX = 0; [L717] 0 int a = 0; [L718] 0 _Bool a$flush_delayed; [L719] 0 int a$mem_tmp; [L720] 0 _Bool a$r_buff0_thd0; [L721] 0 _Bool a$r_buff0_thd1; [L722] 0 _Bool a$r_buff0_thd2; [L723] 0 _Bool a$r_buff0_thd3; [L724] 0 _Bool a$r_buff1_thd0; [L725] 0 _Bool a$r_buff1_thd1; [L726] 0 _Bool a$r_buff1_thd2; [L727] 0 _Bool a$r_buff1_thd3; [L728] 0 _Bool a$read_delayed; [L729] 0 int *a$read_delayed_var; [L730] 0 int a$w_buff0; [L731] 0 _Bool a$w_buff0_used; [L732] 0 int a$w_buff1; [L733] 0 _Bool a$w_buff1_used; [L734] 0 _Bool main$tmp_guard0; [L735] 0 _Bool main$tmp_guard1; [L737] 0 int x = 0; [L739] 0 int y = 0; [L741] 0 int z = 0; [L742] 0 _Bool weak$$choice0; [L743] 0 _Bool weak$$choice2; [L843] 0 pthread_t t1105[2]; [L844] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a$flush_delayed=0, a$mem_tmp=0, a$r_buff0_thd0=0, a$r_buff0_thd1=0, a$r_buff0_thd2=0, a$r_buff0_thd3=0, a$r_buff1_thd0=0, a$r_buff1_thd1=0, a$r_buff1_thd2=0, a$r_buff1_thd3=0, a$read_delayed=0, a$read_delayed_var={0:0}, a$w_buff0=0, a$w_buff0_used=0, a$w_buff1=0, a$w_buff1_used=0, a=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t1105={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z=0] [L844] COND TRUE 0 asdf<2 [L844] FCALL, FORK 0 pthread_create(&t1105[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a$flush_delayed=0, a$mem_tmp=0, a$r_buff0_thd0=0, a$r_buff0_thd1=0, a$r_buff0_thd2=0, a$r_buff0_thd3=0, a$r_buff1_thd0=0, a$r_buff1_thd1=0, a$r_buff1_thd2=0, a$r_buff1_thd3=0, a$read_delayed=0, a$read_delayed_var={0:0}, a$w_buff0=0, a$w_buff0_used=0, a$w_buff1=0, a$w_buff1_used=0, a=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1105[asdf], ((void *)0), P0, ((void *)0))=-2, t1105={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z=0] [L747] 1 a$w_buff1 = a$w_buff0 [L748] 1 a$w_buff0 = 1 [L749] 1 a$w_buff1_used = a$w_buff0_used [L750] 1 a$w_buff0_used = (_Bool)1 [L751] CALL 1 __VERIFIER_assert(!(a$w_buff1_used && a$w_buff0_used)) [L18] COND FALSE 1 !(!expression) [L751] RET 1 __VERIFIER_assert(!(a$w_buff1_used && a$w_buff0_used)) [L752] 1 a$r_buff1_thd0 = a$r_buff0_thd0 [L753] 1 a$r_buff1_thd1 = a$r_buff0_thd1 [L754] 1 a$r_buff1_thd2 = a$r_buff0_thd2 [L755] 1 a$r_buff1_thd3 = a$r_buff0_thd3 [L756] 1 a$r_buff0_thd1 = (_Bool)1 VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a$flush_delayed=0, a$mem_tmp=0, a$r_buff0_thd0=0, a$r_buff0_thd1=1, a$r_buff0_thd2=0, a$r_buff0_thd3=0, a$r_buff1_thd0=0, a$r_buff1_thd1=0, a$r_buff1_thd2=0, a$r_buff1_thd3=0, a$read_delayed=0, a$read_delayed_var={0:0}, a$w_buff0=1, a$w_buff0_used=1, a$w_buff1=0, a$w_buff1_used=0, a=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z=0] [L844] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a$flush_delayed=0, a$mem_tmp=0, a$r_buff0_thd0=0, a$r_buff0_thd1=1, a$r_buff0_thd2=0, a$r_buff0_thd3=0, a$r_buff1_thd0=0, a$r_buff1_thd1=0, a$r_buff1_thd2=0, a$r_buff1_thd3=0, a$read_delayed=0, a$read_delayed_var={0:0}, a$w_buff0=1, a$w_buff0_used=1, a$w_buff1=0, a$w_buff1_used=0, a=0, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t1105={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z=0] [L844] COND TRUE 0 asdf<2 [L844] FCALL, FORK 0 pthread_create(&t1105[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a$flush_delayed=0, a$mem_tmp=0, a$r_buff0_thd0=0, a$r_buff0_thd1=1, a$r_buff0_thd2=0, a$r_buff0_thd3=0, a$r_buff1_thd0=0, a$r_buff1_thd1=0, a$r_buff1_thd2=0, a$r_buff1_thd3=0, a$read_delayed=0, a$read_delayed_var={0:0}, a$w_buff0=1, a$w_buff0_used=1, a$w_buff1=0, a$w_buff1_used=0, a=0, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1105[asdf], ((void *)0), P0, ((void *)0))=-1, t1105={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z=0] [L747] 2 a$w_buff1 = a$w_buff0 [L748] 2 a$w_buff0 = 1 [L749] 2 a$w_buff1_used = a$w_buff0_used [L750] 2 a$w_buff0_used = (_Bool)1 [L751] CALL 2 __VERIFIER_assert(!(a$w_buff1_used && a$w_buff0_used)) [L18] COND TRUE 2 !expression [L18] 2 reach_error() VAL [\old(expression)=1, __unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a$flush_delayed=0, a$mem_tmp=0, a$r_buff0_thd0=0, a$r_buff0_thd1=1, a$r_buff0_thd2=0, a$r_buff0_thd3=0, a$r_buff1_thd0=0, a$r_buff1_thd1=0, a$r_buff1_thd2=0, a$r_buff1_thd3=0, a$read_delayed=0, a$read_delayed_var={0:0}, a$w_buff0=1, a$w_buff0_used=1, a$w_buff1=1, a$w_buff1_used=1, a=0, expression=1, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z=0] - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 156 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.0s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 21 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50 IncrementalHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 50 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 183 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 105.4s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 100.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 337 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 271 mSDsluCounter, 16 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 871 IncrementalHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 16 mSDtfsCounter, 871 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=169occurred in iteration=5, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 202 NumberOfCodeBlocks, 202 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 226 ConstructedInterpolants, 0 QuantifiedInterpolants, 384 SizeOfPredicates, 0 NumberOfNonLiveVariables, 904 ConjunctsInSsa, 16 ConjunctsInUnsatCore, 14 InterpolantComputations, 5 PerfectInterpolantSequences, 124/141 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 10 procedures, 183 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 116.1s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 112.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 32 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 171 IncrementalHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 8 mSDtfsCounter, 171 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=2, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-03 23:46:29,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...