/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:56:04,739 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:56:04,818 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:56:04,823 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:56:04,824 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:56:04,824 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:56:04,825 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:56:04,851 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:56:04,852 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:56:04,856 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:56:04,856 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:56:04,857 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:56:04,857 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:56:04,858 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:56:04,859 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:56:04,859 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:56:04,859 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:56:04,859 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:56:04,859 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:56:04,860 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:56:04,860 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:56:04,860 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:56:04,860 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:56:04,861 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:56:04,861 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:56:04,861 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:56:04,861 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:56:04,862 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:56:04,862 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:56:04,862 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:56:04,863 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:56:04,864 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:56:04,864 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:56:04,864 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:56:04,864 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:56:04,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:56:04,864 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:56:04,865 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:56:04,865 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:56:04,865 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:56:04,865 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:56:04,865 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:56:05,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:56:05,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:56:05,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:56:05,150 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:56:05,151 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:56:05,152 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-03 23:56:06,313 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:56:06,538 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:56:06,539 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-03 23:56:06,550 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/384369550/e7558bdc436445bbadcf3528942e1f11/FLAG53ead1e19 [2023-08-03 23:56:06,562 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/384369550/e7558bdc436445bbadcf3528942e1f11 [2023-08-03 23:56:06,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:56:06,570 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:56:06,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:56:06,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:56:06,576 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:56:06,577 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:56:06" (1/1) ... [2023-08-03 23:56:06,578 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f48c4ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:06, skipping insertion in model container [2023-08-03 23:56:06,578 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:56:06" (1/1) ... [2023-08-03 23:56:06,638 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:56:06,805 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[974,987] [2023-08-03 23:56:07,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:56:07,042 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:56:07,055 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[974,987] [2023-08-03 23:56:07,068 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:56:07,069 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:56:07,110 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:56:07,140 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:56:07,140 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:56:07,146 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:56:07,147 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07 WrapperNode [2023-08-03 23:56:07,147 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:56:07,148 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:56:07,149 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:56:07,149 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:56:07,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07" (1/1) ... [2023-08-03 23:56:07,168 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07" (1/1) ... [2023-08-03 23:56:07,197 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 189 [2023-08-03 23:56:07,197 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:56:07,198 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:56:07,198 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:56:07,198 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:56:07,206 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07" (1/1) ... [2023-08-03 23:56:07,206 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07" (1/1) ... [2023-08-03 23:56:07,218 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07" (1/1) ... [2023-08-03 23:56:07,219 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07" (1/1) ... [2023-08-03 23:56:07,227 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07" (1/1) ... [2023-08-03 23:56:07,231 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07" (1/1) ... [2023-08-03 23:56:07,233 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07" (1/1) ... [2023-08-03 23:56:07,235 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07" (1/1) ... [2023-08-03 23:56:07,238 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:56:07,239 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:56:07,239 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:56:07,239 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:56:07,240 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07" (1/1) ... [2023-08-03 23:56:07,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:56:07,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:56:07,269 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 23:56:07,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 23:56:07,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:56:07,319 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:56:07,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:56:07,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:56:07,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:56:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:56:07,320 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:56:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:56:07,320 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:56:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:56:07,320 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:56:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:56:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:56:07,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:56:07,321 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:56:07,322 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:56:07,435 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:56:07,437 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:56:07,868 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:56:07,992 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:56:07,992 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:56:07,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:56:07 BoogieIcfgContainer [2023-08-03 23:56:07,995 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:56:07,997 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:56:07,997 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:56:08,000 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:56:08,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:56:06" (1/3) ... [2023-08-03 23:56:08,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146a1232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:56:08, skipping insertion in model container [2023-08-03 23:56:08,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:56:07" (2/3) ... [2023-08-03 23:56:08,004 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146a1232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:56:08, skipping insertion in model container [2023-08-03 23:56:08,004 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:56:07" (3/3) ... [2023-08-03 23:56:08,005 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_rfi006_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-03 23:56:08,013 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:56:08,021 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:56:08,022 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:56:08,022 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:56:08,076 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:56:08,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 129 transitions, 273 flow [2023-08-03 23:56:08,269 INFO L124 PetriNetUnfolderBase]: 30/447 cut-off events. [2023-08-03 23:56:08,270 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:56:08,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 472 conditions, 447 events. 30/447 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1951 event pairs, 0 based on Foata normal form. 0/393 useless extension candidates. Maximal degree in co-relation 272. Up to 16 conditions per place. [2023-08-03 23:56:08,276 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 129 transitions, 273 flow [2023-08-03 23:56:08,280 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 100 transitions, 215 flow [2023-08-03 23:56:08,283 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:56:08,294 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 100 transitions, 215 flow [2023-08-03 23:56:08,298 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 100 transitions, 215 flow [2023-08-03 23:56:08,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 100 transitions, 215 flow [2023-08-03 23:56:08,327 INFO L124 PetriNetUnfolderBase]: 6/215 cut-off events. [2023-08-03 23:56:08,327 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:56:08,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 215 events. 6/215 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 622 event pairs, 0 based on Foata normal form. 0/201 useless extension candidates. Maximal degree in co-relation 156. Up to 8 conditions per place. [2023-08-03 23:56:08,331 INFO L119 LiptonReduction]: Number of co-enabled transitions 1448 [2023-08-03 23:56:11,190 INFO L134 LiptonReduction]: Checked pairs total: 3935 [2023-08-03 23:56:11,190 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-03 23:56:11,201 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:56:11,207 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;@6ac8dd9c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:56:11,207 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:56:11,212 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:56:11,212 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-03 23:56:11,213 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:56:11,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:56:11,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:56:11,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:56:11,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:56:11,218 INFO L85 PathProgramCache]: Analyzing trace with hash -454390060, now seen corresponding path program 1 times [2023-08-03 23:56:11,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:56:11,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441009823] [2023-08-03 23:56:11,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:11,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:56:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:56:11,459 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 23:56:11,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:56:11,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441009823] [2023-08-03 23:56:11,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441009823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:56:11,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:56:11,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:56:11,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460223190] [2023-08-03 23:56:11,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:56:11,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:56:11,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:56:11,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:56:11,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:56:11,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 208 [2023-08-03 23:56:11,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:11,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:56:11,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 208 [2023-08-03 23:56:11,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:56:11,685 INFO L124 PetriNetUnfolderBase]: 559/962 cut-off events. [2023-08-03 23:56:11,685 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-03 23:56:11,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1962 conditions, 962 events. 559/962 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4485 event pairs, 304 based on Foata normal form. 0/874 useless extension candidates. Maximal degree in co-relation 1941. Up to 900 conditions per place. [2023-08-03 23:56:11,693 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 24 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-03 23:56:11,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 129 flow [2023-08-03 23:56:11,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:56:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:56:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 351 transitions. [2023-08-03 23:56:11,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-08-03 23:56:11,706 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 351 transitions. [2023-08-03 23:56:11,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 351 transitions. [2023-08-03 23:56:11,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:56:11,710 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 351 transitions. [2023-08-03 23:56:11,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:11,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:11,718 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:11,720 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 69 flow. Second operand 3 states and 351 transitions. [2023-08-03 23:56:11,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 129 flow [2023-08-03 23:56:11,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 129 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:56:11,724 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 77 flow [2023-08-03 23:56:11,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, 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 23:56:11,728 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-03 23:56:11,728 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 77 flow [2023-08-03 23:56:11,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:11,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:56:11,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:56:11,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:56:11,729 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:56:11,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:56:11,730 INFO L85 PathProgramCache]: Analyzing trace with hash -457399507, now seen corresponding path program 1 times [2023-08-03 23:56:11,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:56:11,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916030142] [2023-08-03 23:56:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:11,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:56:11,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:56:11,749 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:56:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:56:11,778 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:56:11,778 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:56:11,779 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:56:11,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:56:11,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:56:11,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:56:11,781 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 23:56:11,783 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:56:11,784 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:56:11,784 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:56:11,809 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:56:11,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 344 flow [2023-08-03 23:56:11,955 INFO L124 PetriNetUnfolderBase]: 93/1369 cut-off events. [2023-08-03 23:56:11,956 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:56:11,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1467 conditions, 1369 events. 93/1369 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9392 event pairs, 0 based on Foata normal form. 0/1204 useless extension candidates. Maximal degree in co-relation 1001. Up to 54 conditions per place. [2023-08-03 23:56:11,964 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 154 transitions, 344 flow [2023-08-03 23:56:11,966 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 125 transitions, 286 flow [2023-08-03 23:56:11,967 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:56:11,967 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 125 transitions, 286 flow [2023-08-03 23:56:11,967 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 125 transitions, 286 flow [2023-08-03 23:56:11,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 125 transitions, 286 flow [2023-08-03 23:56:12,026 INFO L124 PetriNetUnfolderBase]: 12/586 cut-off events. [2023-08-03 23:56:12,026 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:56:12,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 586 events. 12/586 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2991 event pairs, 0 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 479. Up to 27 conditions per place. [2023-08-03 23:56:12,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 4000 [2023-08-03 23:56:14,836 INFO L134 LiptonReduction]: Checked pairs total: 13117 [2023-08-03 23:56:14,836 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-03 23:56:14,838 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:56:14,839 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;@6ac8dd9c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:56:14,839 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:56:14,846 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:56:14,847 INFO L124 PetriNetUnfolderBase]: 0/68 cut-off events. [2023-08-03 23:56:14,847 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 23:56:14,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:56:14,847 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:56:14,847 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 23:56:14,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:56:14,848 INFO L85 PathProgramCache]: Analyzing trace with hash 939547323, now seen corresponding path program 1 times [2023-08-03 23:56:14,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:56:14,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766902857] [2023-08-03 23:56:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:14,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:56:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:56:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:56:14,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:56:14,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766902857] [2023-08-03 23:56:14,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766902857] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:56:14,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:56:14,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:56:14,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551190574] [2023-08-03 23:56:14,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:56:14,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:56:14,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:56:14,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:56:14,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:56:14,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 240 [2023-08-03 23:56:14,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:14,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:56:14,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 240 [2023-08-03 23:56:14,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:56:31,843 INFO L124 PetriNetUnfolderBase]: 141163/185195 cut-off events. [2023-08-03 23:56:31,844 INFO L125 PetriNetUnfolderBase]: For 11900/11900 co-relation queries the response was YES. [2023-08-03 23:56:32,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378230 conditions, 185195 events. 141163/185195 cut-off events. For 11900/11900 co-relation queries the response was YES. Maximal size of possible extension queue 5215. Compared 1194498 event pairs, 112756 based on Foata normal form. 0/171811 useless extension candidates. Maximal degree in co-relation 87918. Up to 179040 conditions per place. [2023-08-03 23:56:33,225 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 39 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2023-08-03 23:56:33,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 220 flow [2023-08-03 23:56:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:56:33,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:56:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-03 23:56:33,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2023-08-03 23:56:33,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-03 23:56:33,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-03 23:56:33,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:56:33,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-03 23:56:33,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:33,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:33,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:33,234 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 128 flow. Second operand 3 states and 414 transitions. [2023-08-03 23:56:33,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 220 flow [2023-08-03 23:56:33,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 51 transitions, 214 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:56:33,244 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 134 flow [2023-08-03 23:56:33,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-08-03 23:56:33,245 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-03 23:56:33,245 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 134 flow [2023-08-03 23:56:33,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:33,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:56:33,246 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:56:33,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:56:33,246 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 23:56:33,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:56:33,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1125393514, now seen corresponding path program 1 times [2023-08-03 23:56:33,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:56:33,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559681285] [2023-08-03 23:56:33,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:33,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:56:33,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:56:33,364 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 23:56:33,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:56:33,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559681285] [2023-08-03 23:56:33,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559681285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:56:33,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636551537] [2023-08-03 23:56:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:33,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:56:33,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:56:33,366 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:56:33,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:56:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:56:33,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:56:33,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:56:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:56:33,488 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:56:33,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636551537] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:56:33,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:56:33,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:56:33,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652732467] [2023-08-03 23:56:33,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:56:33,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:56:33,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:56:33,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:56:33,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:56:33,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 240 [2023-08-03 23:56:33,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:33,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:56:33,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 240 [2023-08-03 23:56:33,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:56:49,112 INFO L124 PetriNetUnfolderBase]: 141139/185175 cut-off events. [2023-08-03 23:56:49,113 INFO L125 PetriNetUnfolderBase]: For 11104/11104 co-relation queries the response was YES. [2023-08-03 23:56:49,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 377449 conditions, 185175 events. 141139/185175 cut-off events. For 11104/11104 co-relation queries the response was YES. Maximal size of possible extension queue 5215. Compared 1195385 event pairs, 90040 based on Foata normal form. 16/171851 useless extension candidates. Maximal degree in co-relation 99085. Up to 178957 conditions per place. [2023-08-03 23:56:50,268 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 44 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-08-03 23:56:50,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 250 flow [2023-08-03 23:56:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:56:50,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:56:50,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 664 transitions. [2023-08-03 23:56:50,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5533333333333333 [2023-08-03 23:56:50,271 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 664 transitions. [2023-08-03 23:56:50,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 664 transitions. [2023-08-03 23:56:50,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:56:50,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 664 transitions. [2023-08-03 23:56:50,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 132.8) internal successors, (664), 5 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:50,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:50,276 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:50,276 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 134 flow. Second operand 5 states and 664 transitions. [2023-08-03 23:56:50,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 250 flow [2023-08-03 23:56:50,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:56:50,278 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 148 flow [2023-08-03 23:56:50,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2023-08-03 23:56:50,279 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-03 23:56:50,279 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 148 flow [2023-08-03 23:56:50,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.6) internal successors, (623), 5 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:50,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:56:50,279 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:56:50,285 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:56:50,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:56:50,480 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 23:56:50,481 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:56:50,481 INFO L85 PathProgramCache]: Analyzing trace with hash 674203889, now seen corresponding path program 1 times [2023-08-03 23:56:50,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:56:50,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467360950] [2023-08-03 23:56:50,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:50,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:56:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:56:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:56:50,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:56:50,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467360950] [2023-08-03 23:56:50,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467360950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:56:50,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20662504] [2023-08-03 23:56:50,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:56:50,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:56:50,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:56:50,582 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:56:50,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:56:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:56:50,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:56:50,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:56:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:56:50,700 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:56:50,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20662504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:56:50,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:56:50,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:56:50,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121269974] [2023-08-03 23:56:50,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:56:50,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:56:50,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:56:50,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:56:50,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:56:50,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 240 [2023-08-03 23:56:50,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:56:50,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:56:50,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 240 [2023-08-03 23:56:50,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:05,528 INFO L124 PetriNetUnfolderBase]: 139252/182113 cut-off events. [2023-08-03 23:57:05,528 INFO L125 PetriNetUnfolderBase]: For 10503/10503 co-relation queries the response was YES. [2023-08-03 23:57:06,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372983 conditions, 182113 events. 139252/182113 cut-off events. For 10503/10503 co-relation queries the response was YES. Maximal size of possible extension queue 5250. Compared 1170418 event pairs, 108336 based on Foata normal form. 0/169353 useless extension candidates. Maximal degree in co-relation 146205. Up to 175923 conditions per place. [2023-08-03 23:57:06,663 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 48 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-03 23:57:06,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 60 transitions, 276 flow [2023-08-03 23:57:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:57:06,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:57:06,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-08-03 23:57:06,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2023-08-03 23:57:06,665 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-08-03 23:57:06,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-08-03 23:57:06,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:06,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-08-03 23:57:06,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:06,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:06,669 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:06,669 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 148 flow. Second operand 3 states and 422 transitions. [2023-08-03 23:57:06,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 60 transitions, 276 flow [2023-08-03 23:57:06,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 269 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:57:06,671 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 156 flow [2023-08-03 23:57:06,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-08-03 23:57:06,672 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-08-03 23:57:06,672 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 156 flow [2023-08-03 23:57:06,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:06,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:06,673 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:06,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-03 23:57:06,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:06,878 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 23:57:06,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:06,878 INFO L85 PathProgramCache]: Analyzing trace with hash 477450495, now seen corresponding path program 1 times [2023-08-03 23:57:06,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:06,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034165675] [2023-08-03 23:57:06,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:06,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:06,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:06,922 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 23:57:06,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:06,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034165675] [2023-08-03 23:57:06,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034165675] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:57:06,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042245783] [2023-08-03 23:57:06,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:06,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:06,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:06,924 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:57:06,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:57:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:07,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:57:07,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:57:07,036 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 23:57:07,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:57:07,052 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 23:57:07,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042245783] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:57:07,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:57:07,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:57:07,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868943692] [2023-08-03 23:57:07,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:57:07,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:57:07,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:07,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:57:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:57:07,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 240 [2023-08-03 23:57:07,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 125.6) internal successors, (628), 5 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:07,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:07,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 240 [2023-08-03 23:57:07,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:19,510 INFO L124 PetriNetUnfolderBase]: 115850/150114 cut-off events. [2023-08-03 23:57:19,510 INFO L125 PetriNetUnfolderBase]: For 9880/9880 co-relation queries the response was YES. [2023-08-03 23:57:20,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308706 conditions, 150114 events. 115850/150114 cut-off events. For 9880/9880 co-relation queries the response was YES. Maximal size of possible extension queue 4639. Compared 923966 event pairs, 71408 based on Foata normal form. 4/140598 useless extension candidates. Maximal degree in co-relation 80859. Up to 145449 conditions per place. [2023-08-03 23:57:20,455 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 45 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-03 23:57:20,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 57 transitions, 265 flow [2023-08-03 23:57:20,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:57:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:57:20,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 540 transitions. [2023-08-03 23:57:20,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-08-03 23:57:20,458 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 540 transitions. [2023-08-03 23:57:20,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 540 transitions. [2023-08-03 23:57:20,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:20,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 540 transitions. [2023-08-03 23:57:20,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:20,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:20,461 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:20,462 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 156 flow. Second operand 4 states and 540 transitions. [2023-08-03 23:57:20,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 57 transitions, 265 flow [2023-08-03 23:57:20,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 57 transitions, 263 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:57:20,464 INFO L231 Difference]: Finished difference. Result has 68 places, 47 transitions, 151 flow [2023-08-03 23:57:20,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=68, PETRI_TRANSITIONS=47} [2023-08-03 23:57:20,465 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-03 23:57:20,465 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 47 transitions, 151 flow [2023-08-03 23:57:20,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.6) internal successors, (628), 5 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:20,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:20,466 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:20,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 23:57:20,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:20,671 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 23:57:20,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:20,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1450723412, now seen corresponding path program 1 times [2023-08-03 23:57:20,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:20,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112628396] [2023-08-03 23:57:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:20,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:57:20,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:20,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112628396] [2023-08-03 23:57:20,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112628396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:57:20,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861874300] [2023-08-03 23:57:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:20,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:20,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:20,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:57:20,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:57:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:20,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:57:20,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:57:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:57:20,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:57:20,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861874300] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:20,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:57:20,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:57:20,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639478911] [2023-08-03 23:57:20,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:20,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:57:20,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:20,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:57:20,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:57:20,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 240 [2023-08-03 23:57:20,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 47 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 125.6) internal successors, (628), 5 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:20,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:20,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 240 [2023-08-03 23:57:20,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:32,779 INFO L124 PetriNetUnfolderBase]: 114026/148039 cut-off events. [2023-08-03 23:57:32,779 INFO L125 PetriNetUnfolderBase]: For 7695/7695 co-relation queries the response was YES. [2023-08-03 23:57:33,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304364 conditions, 148039 events. 114026/148039 cut-off events. For 7695/7695 co-relation queries the response was YES. Maximal size of possible extension queue 4649. Compared 921727 event pairs, 26250 based on Foata normal form. 576/139655 useless extension candidates. Maximal degree in co-relation 144869. Up to 140128 conditions per place. [2023-08-03 23:57:33,764 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 69 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-03 23:57:33,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 81 transitions, 365 flow [2023-08-03 23:57:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:57:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:57:33,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 688 transitions. [2023-08-03 23:57:33,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2023-08-03 23:57:33,766 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 688 transitions. [2023-08-03 23:57:33,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 688 transitions. [2023-08-03 23:57:33,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:33,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 688 transitions. [2023-08-03 23:57:33,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.6) internal successors, (688), 5 states have internal predecessors, (688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:33,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:33,770 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:33,771 INFO L175 Difference]: Start difference. First operand has 68 places, 47 transitions, 151 flow. Second operand 5 states and 688 transitions. [2023-08-03 23:57:33,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 81 transitions, 365 flow [2023-08-03 23:57:33,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 81 transitions, 358 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:57:33,777 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 161 flow [2023-08-03 23:57:33,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2023-08-03 23:57:33,778 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-03 23:57:33,778 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 161 flow [2023-08-03 23:57:33,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.6) internal successors, (628), 5 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:33,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:33,778 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:33,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 23:57:33,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:33,984 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 23:57:33,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:33,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1325149597, now seen corresponding path program 1 times [2023-08-03 23:57:33,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:33,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680325445] [2023-08-03 23:57:33,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:33,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:57:34,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:34,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680325445] [2023-08-03 23:57:34,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680325445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:57:34,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686541493] [2023-08-03 23:57:34,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:34,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:34,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:34,044 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 23:57:34,046 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 23:57:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:34,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:57:34,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:57:34,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:57:34,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:57:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:57:34,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686541493] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:57:34,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:57:34,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:57:34,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583757327] [2023-08-03 23:57:34,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:57:34,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:57:34,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:57:34,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:57:34,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 240 [2023-08-03 23:57:34,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:34,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:34,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 240 [2023-08-03 23:57:34,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:45,033 INFO L124 PetriNetUnfolderBase]: 101098/130503 cut-off events. [2023-08-03 23:57:45,033 INFO L125 PetriNetUnfolderBase]: For 10429/10429 co-relation queries the response was YES. [2023-08-03 23:57:45,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270168 conditions, 130503 events. 101098/130503 cut-off events. For 10429/10429 co-relation queries the response was YES. Maximal size of possible extension queue 4419. Compared 788455 event pairs, 58794 based on Foata normal form. 96/122295 useless extension candidates. Maximal degree in co-relation 128757. Up to 123353 conditions per place. [2023-08-03 23:57:46,071 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 63 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-03 23:57:46,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 74 transitions, 343 flow [2023-08-03 23:57:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:57:46,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:57:46,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 558 transitions. [2023-08-03 23:57:46,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2023-08-03 23:57:46,074 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 558 transitions. [2023-08-03 23:57:46,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 558 transitions. [2023-08-03 23:57:46,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:46,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 558 transitions. [2023-08-03 23:57:46,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 139.5) internal successors, (558), 4 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:46,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:46,078 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:46,078 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 161 flow. Second operand 4 states and 558 transitions. [2023-08-03 23:57:46,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 74 transitions, 343 flow [2023-08-03 23:57:46,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 74 transitions, 338 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:57:46,082 INFO L231 Difference]: Finished difference. Result has 70 places, 46 transitions, 154 flow [2023-08-03 23:57:46,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=70, PETRI_TRANSITIONS=46} [2023-08-03 23:57:46,083 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2023-08-03 23:57:46,083 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 46 transitions, 154 flow [2023-08-03 23:57:46,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:46,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:46,083 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:46,093 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 23:57:46,288 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 23:57:46,288 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 23:57:46,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:46,289 INFO L85 PathProgramCache]: Analyzing trace with hash 269539573, now seen corresponding path program 1 times [2023-08-03 23:57:46,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:46,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804020603] [2023-08-03 23:57:46,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:46,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:57:46,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:46,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804020603] [2023-08-03 23:57:46,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804020603] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:57:46,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975254399] [2023-08-03 23:57:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:46,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:46,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:57:46,369 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:57:46,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:57:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:46,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:57:46,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:57:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:57:46,493 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:57:46,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975254399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:46,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:57:46,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:57:46,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562962650] [2023-08-03 23:57:46,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:46,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:57:46,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:46,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:57:46,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:57:46,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 240 [2023-08-03 23:57:46,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 46 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:46,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:46,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 240 [2023-08-03 23:57:46,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:57:52,642 INFO L124 PetriNetUnfolderBase]: 58090/77239 cut-off events. [2023-08-03 23:57:52,642 INFO L125 PetriNetUnfolderBase]: For 8197/8197 co-relation queries the response was YES. [2023-08-03 23:57:52,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163048 conditions, 77239 events. 58090/77239 cut-off events. For 8197/8197 co-relation queries the response was YES. Maximal size of possible extension queue 2631. Compared 466011 event pairs, 3850 based on Foata normal form. 9216/81223 useless extension candidates. Maximal degree in co-relation 77501. Up to 56640 conditions per place. [2023-08-03 23:57:52,915 INFO L140 encePairwiseOnDemand]: 238/240 looper letters, 0 selfloop transitions, 0 changer transitions 80/80 dead transitions. [2023-08-03 23:57:52,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 80 transitions, 366 flow [2023-08-03 23:57:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:57:52,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:57:52,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 568 transitions. [2023-08-03 23:57:52,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2023-08-03 23:57:52,917 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 568 transitions. [2023-08-03 23:57:52,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 568 transitions. [2023-08-03 23:57:52,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:57:52,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 568 transitions. [2023-08-03 23:57:52,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:52,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:52,921 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:52,921 INFO L175 Difference]: Start difference. First operand has 70 places, 46 transitions, 154 flow. Second operand 4 states and 568 transitions. [2023-08-03 23:57:52,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 80 transitions, 366 flow [2023-08-03 23:57:54,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 80 transitions, 359 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:57:54,029 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2023-08-03 23:57:54,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2023-08-03 23:57:54,030 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-03 23:57:54,030 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2023-08-03 23:57:54,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 127.75) internal successors, (511), 4 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:54,030 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:57:54,030 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:57:54,031 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:57:54,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 23:57:54,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:57:54,232 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:57:54,232 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:57:54,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 344 flow [2023-08-03 23:57:54,348 INFO L124 PetriNetUnfolderBase]: 93/1369 cut-off events. [2023-08-03 23:57:54,348 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:57:54,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1467 conditions, 1369 events. 93/1369 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9392 event pairs, 0 based on Foata normal form. 0/1204 useless extension candidates. Maximal degree in co-relation 1001. Up to 54 conditions per place. [2023-08-03 23:57:54,355 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 154 transitions, 344 flow [2023-08-03 23:57:54,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 153 transitions, 338 flow [2023-08-03 23:57:54,359 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:57:54,359 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 153 transitions, 338 flow [2023-08-03 23:57:54,359 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 153 transitions, 338 flow [2023-08-03 23:57:54,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 153 transitions, 338 flow [2023-08-03 23:57:54,464 INFO L124 PetriNetUnfolderBase]: 93/1368 cut-off events. [2023-08-03 23:57:54,465 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-03 23:57:54,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1464 conditions, 1368 events. 93/1368 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9384 event pairs, 0 based on Foata normal form. 0/1203 useless extension candidates. Maximal degree in co-relation 998. Up to 54 conditions per place. [2023-08-03 23:57:54,494 INFO L119 LiptonReduction]: Number of co-enabled transitions 6524 [2023-08-03 23:57:58,160 INFO L134 LiptonReduction]: Checked pairs total: 20558 [2023-08-03 23:57:58,160 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-03 23:57:58,162 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:57:58,162 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;@6ac8dd9c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:57:58,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:57:58,164 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:57:58,164 INFO L124 PetriNetUnfolderBase]: 0/15 cut-off events. [2023-08-03 23:57:58,164 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:57:58,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:57:58,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 23:57:58,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:57:58,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:57:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash 905763379, now seen corresponding path program 1 times [2023-08-03 23:57:58,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:57:58,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915664051] [2023-08-03 23:57:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:57:58,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:57:58,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:57:58,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:57:58,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:57:58,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915664051] [2023-08-03 23:57:58,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915664051] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:57:58,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:57:58,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:57:58,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153081985] [2023-08-03 23:57:58,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:57:58,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:57:58,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:57:58,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:57:58,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:57:58,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 273 [2023-08-03 23:57:58,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 50 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:57:58,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:57:58,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 273 [2023-08-03 23:57:58,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:58:56,059 INFO L124 PetriNetUnfolderBase]: 515668/657540 cut-off events. [2023-08-03 23:58:56,060 INFO L125 PetriNetUnfolderBase]: For 12140/12140 co-relation queries the response was YES. [2023-08-03 23:58:57,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1315812 conditions, 657540 events. 515668/657540 cut-off events. For 12140/12140 co-relation queries the response was YES. Maximal size of possible extension queue 15228. Compared 4297851 event pairs, 419536 based on Foata normal form. 0/578228 useless extension candidates. Maximal degree in co-relation 283662. Up to 643845 conditions per place. [2023-08-03 23:58:59,819 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 44 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-03 23:58:59,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 55 transitions, 234 flow [2023-08-03 23:58:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:58:59,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:58:59,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-08-03 23:58:59,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115995115995116 [2023-08-03 23:58:59,821 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-08-03 23:58:59,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-08-03 23:58:59,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:58:59,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-08-03 23:58:59,822 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:59,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:59,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:59,824 INFO L175 Difference]: Start difference. First operand has 63 places, 50 transitions, 132 flow. Second operand 3 states and 419 transitions. [2023-08-03 23:58:59,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 55 transitions, 234 flow [2023-08-03 23:58:59,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 55 transitions, 230 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-03 23:58:59,831 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 140 flow [2023-08-03 23:58:59,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=128, 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=140, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2023-08-03 23:58:59,831 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 3 predicate places. [2023-08-03 23:58:59,832 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 140 flow [2023-08-03 23:58:59,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:58:59,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:58:59,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:58:59,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 23:58:59,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:58:59,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:58:59,832 INFO L85 PathProgramCache]: Analyzing trace with hash -502769514, now seen corresponding path program 1 times [2023-08-03 23:58:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:58:59,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147168186] [2023-08-03 23:58:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:59,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:58:59,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:58:59,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:58:59,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147168186] [2023-08-03 23:58:59,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147168186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:58:59,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283102436] [2023-08-03 23:58:59,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:58:59,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:58:59,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:58:59,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:58:59,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 23:58:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:58:59,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:58:59,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:58:59,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:58:59,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:58:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:58:59,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283102436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:58:59,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:58:59,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:58:59,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975784164] [2023-08-03 23:58:59,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:58:59,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:58:59,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:58:59,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:58:59,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:59:00,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 273 [2023-08-03 23:59:00,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 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 23:59:00,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:00,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 273 [2023-08-03 23:59:00,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:59:52,268 INFO L124 PetriNetUnfolderBase]: 427922/541486 cut-off events. [2023-08-03 23:59:52,268 INFO L125 PetriNetUnfolderBase]: For 8888/8888 co-relation queries the response was YES. [2023-08-03 23:59:53,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082767 conditions, 541486 events. 427922/541486 cut-off events. For 8888/8888 co-relation queries the response was YES. Maximal size of possible extension queue 13222. Compared 3409108 event pairs, 274124 based on Foata normal form. 4/478082 useless extension candidates. Maximal degree in co-relation 283501. Up to 530393 conditions per place. [2023-08-03 23:59:55,575 INFO L140 encePairwiseOnDemand]: 269/273 looper letters, 49 selfloop transitions, 3 changer transitions 1/62 dead transitions. [2023-08-03 23:59:55,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 268 flow [2023-08-03 23:59:55,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:59:55,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:59:55,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 546 transitions. [2023-08-03 23:59:55,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-03 23:59:55,577 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 546 transitions. [2023-08-03 23:59:55,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 546 transitions. [2023-08-03 23:59:55,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:59:55,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 546 transitions. [2023-08-03 23:59:55,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 136.5) internal successors, (546), 4 states have internal predecessors, (546), 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 23:59:55,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 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 23:59:55,580 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 273.0) internal successors, (1365), 5 states have internal predecessors, (1365), 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 23:59:55,581 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 140 flow. Second operand 4 states and 546 transitions. [2023-08-03 23:59:55,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 268 flow [2023-08-03 23:59:55,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 62 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:59:55,582 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 152 flow [2023-08-03 23:59:55,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=65, 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=152, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2023-08-03 23:59:55,583 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-03 23:59:55,583 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 152 flow [2023-08-03 23:59:55,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 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 23:59:55,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:59:55,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:59:55,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 23:59:55,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:59:55,789 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:59:55,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:59:55,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1166137158, now seen corresponding path program 1 times [2023-08-03 23:59:55,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:59:55,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107112194] [2023-08-03 23:59:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:59:55,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:59:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:59:56,076 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 23:59:56,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:59:56,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107112194] [2023-08-03 23:59:56,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107112194] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:59:56,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:59:56,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 23:59:56,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596739825] [2023-08-03 23:59:56,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:59:56,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:59:56,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:59:56,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:59:56,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:59:56,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 273 [2023-08-03 23:59:56,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 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 23:59:56,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:59:56,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 273 [2023-08-03 23:59:56,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:00:42,222 INFO L124 PetriNetUnfolderBase]: 385818/496007 cut-off events. [2023-08-04 00:00:42,225 INFO L125 PetriNetUnfolderBase]: For 8352/8352 co-relation queries the response was YES. [2023-08-04 00:00:44,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 984168 conditions, 496007 events. 385818/496007 cut-off events. For 8352/8352 co-relation queries the response was YES. Maximal size of possible extension queue 12536. Compared 3309171 event pairs, 62010 based on Foata normal form. 0/447719 useless extension candidates. Maximal degree in co-relation 468789. Up to 452545 conditions per place. [2023-08-04 00:00:45,862 INFO L140 encePairwiseOnDemand]: 268/273 looper letters, 65 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-04 00:00:45,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 77 transitions, 353 flow [2023-08-04 00:00:45,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:00:45,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:00:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-04 00:00:45,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5494505494505495 [2023-08-04 00:00:45,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-04 00:00:45,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-04 00:00:45,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:00:45,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-04 00:00:45,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:45,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:45,867 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:45,867 INFO L175 Difference]: Start difference. First operand has 70 places, 51 transitions, 152 flow. Second operand 3 states and 450 transitions. [2023-08-04 00:00:45,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 77 transitions, 353 flow [2023-08-04 00:00:45,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 77 transitions, 346 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:00:45,869 INFO L231 Difference]: Finished difference. Result has 70 places, 53 transitions, 166 flow [2023-08-04 00:00:45,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=70, PETRI_TRANSITIONS=53} [2023-08-04 00:00:45,870 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 7 predicate places. [2023-08-04 00:00:45,870 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 53 transitions, 166 flow [2023-08-04 00:00:45,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:45,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:00:45,870 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:00:45,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 00:00:45,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:00:45,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:00:45,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1790683958, now seen corresponding path program 1 times [2023-08-04 00:00:45,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:00:45,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107302906] [2023-08-04 00:00:45,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:00:45,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:00:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:00:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:00:45,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:00:45,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107302906] [2023-08-04 00:00:45,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107302906] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:00:45,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:00:45,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 00:00:45,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218821933] [2023-08-04 00:00:45,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:00:45,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:00:45,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:00:45,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:00:45,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:00:45,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 273 [2023-08-04 00:00:45,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 53 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:00:45,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:00:45,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 273 [2023-08-04 00:00:45,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:01:34,226 INFO L124 PetriNetUnfolderBase]: 379530/476871 cut-off events. [2023-08-04 00:01:34,227 INFO L125 PetriNetUnfolderBase]: For 33545/33545 co-relation queries the response was YES. [2023-08-04 00:01:36,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010520 conditions, 476871 events. 379530/476871 cut-off events. For 33545/33545 co-relation queries the response was YES. Maximal size of possible extension queue 12122. Compared 2952781 event pairs, 315058 based on Foata normal form. 0/430823 useless extension candidates. Maximal degree in co-relation 482549. Up to 469921 conditions per place. [2023-08-04 00:01:37,887 INFO L140 encePairwiseOnDemand]: 270/273 looper letters, 54 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-04 00:01:37,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 65 transitions, 305 flow [2023-08-04 00:01:37,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:01:37,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:01:37,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-04 00:01:37,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5201465201465202 [2023-08-04 00:01:37,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-04 00:01:37,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-04 00:01:37,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:01:37,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-04 00:01:37,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:37,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:37,892 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 273.0) internal successors, (1092), 4 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:37,892 INFO L175 Difference]: Start difference. First operand has 70 places, 53 transitions, 166 flow. Second operand 3 states and 426 transitions. [2023-08-04 00:01:37,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 65 transitions, 305 flow [2023-08-04 00:01:37,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 301 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:01:37,900 INFO L231 Difference]: Finished difference. Result has 72 places, 54 transitions, 175 flow [2023-08-04 00:01:37,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=273, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=72, PETRI_TRANSITIONS=54} [2023-08-04 00:01:37,901 INFO L281 CegarLoopForPetriNet]: 63 programPoint places, 9 predicate places. [2023-08-04 00:01:37,901 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 54 transitions, 175 flow [2023-08-04 00:01:37,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:01:37,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:01:37,901 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:01:37,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 00:01:37,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:01:37,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:01:37,902 INFO L85 PathProgramCache]: Analyzing trace with hash -935503622, now seen corresponding path program 1 times [2023-08-04 00:01:37,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:01:37,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522493777] [2023-08-04 00:01:37,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:01:37,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:01:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:01:37,921 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:01:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:01:37,940 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:01:37,940 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:01:37,940 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-04 00:01:37,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-04 00:01:37,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-04 00:01:37,940 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-04 00:01:37,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-04 00:01:37,941 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 00:01:37,941 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 00:01:37,946 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 00:01:37,947 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 00:01:38,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 12:01:38 BasicIcfg [2023-08-04 00:01:38,032 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 00:01:38,033 INFO L158 Benchmark]: Toolchain (without parser) took 331463.33ms. Allocated memory was 541.1MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 490.1MB in the beginning and 12.0GB in the end (delta: -11.5GB). Peak memory consumption was 3.9GB. Max. memory is 16.0GB. [2023-08-04 00:01:38,033 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 379.6MB. Free memory was 329.6MB in the beginning and 329.5MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 00:01:38,034 INFO L158 Benchmark]: CACSL2BoogieTranslator took 577.26ms. Allocated memory is still 541.1MB. Free memory was 490.1MB in the beginning and 465.2MB in the end (delta: 24.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-04 00:01:38,034 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.81ms. Allocated memory is still 541.1MB. Free memory was 465.2MB in the beginning and 462.2MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 00:01:38,034 INFO L158 Benchmark]: Boogie Preprocessor took 40.40ms. Allocated memory is still 541.1MB. Free memory was 461.9MB in the beginning and 459.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 00:01:38,034 INFO L158 Benchmark]: RCFGBuilder took 755.60ms. Allocated memory is still 541.1MB. Free memory was 459.8MB in the beginning and 473.6MB in the end (delta: -13.8MB). Peak memory consumption was 21.3MB. Max. memory is 16.0GB. [2023-08-04 00:01:38,034 INFO L158 Benchmark]: TraceAbstraction took 330035.30ms. Allocated memory was 541.1MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 473.6MB in the beginning and 12.0GB in the end (delta: -11.6GB). Peak memory consumption was 3.9GB. Max. memory is 16.0GB. [2023-08-04 00:01:38,036 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 379.6MB. Free memory was 329.6MB in the beginning and 329.5MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 577.26ms. Allocated memory is still 541.1MB. Free memory was 490.1MB in the beginning and 465.2MB in the end (delta: 24.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.81ms. Allocated memory is still 541.1MB. Free memory was 465.2MB in the beginning and 462.2MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 40.40ms. Allocated memory is still 541.1MB. Free memory was 461.9MB in the beginning and 459.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 755.60ms. Allocated memory is still 541.1MB. Free memory was 459.8MB in the beginning and 473.6MB in the end (delta: -13.8MB). Peak memory consumption was 21.3MB. Max. memory is 16.0GB. * TraceAbstraction took 330035.30ms. Allocated memory was 541.1MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 473.6MB in the beginning and 12.0GB in the end (delta: -11.6GB). Peak memory consumption was 3.9GB. 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: 2.9s, 105 PlacesBefore, 34 PlacesAfterwards, 100 TransitionsBefore, 27 TransitionsAfterwards, 1448 CoEnabledTransitionPairs, 7 FixpointIterations, 36 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 79 TotalNumberOfCompositions, 3935 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2229, independent: 2088, independent conditional: 0, independent unconditional: 2088, dependent: 141, dependent conditional: 0, dependent unconditional: 141, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 748, independent: 728, independent conditional: 0, independent unconditional: 728, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2229, independent: 1360, independent conditional: 0, independent unconditional: 1360, dependent: 121, dependent conditional: 0, dependent unconditional: 121, unknown: 748, unknown conditional: 0, unknown unconditional: 748] , Statistics on independence cache: Total cache size (in pairs): 98, Positive cache size: 86, Positive conditional cache size: 0, Positive unconditional cache size: 86, Negative cache size: 12, Negative conditional cache size: 0, Negative unconditional cache size: 12, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.9s, 136 PlacesBefore, 59 PlacesAfterwards, 125 TransitionsBefore, 46 TransitionsAfterwards, 4000 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 86 TotalNumberOfCompositions, 13117 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5782, independent: 5531, independent conditional: 0, independent unconditional: 5531, dependent: 251, dependent conditional: 0, dependent unconditional: 251, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1960, independent: 1925, independent conditional: 0, independent unconditional: 1925, dependent: 35, dependent conditional: 0, dependent unconditional: 35, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5782, independent: 3606, independent conditional: 0, independent unconditional: 3606, dependent: 216, dependent conditional: 0, dependent unconditional: 216, unknown: 1960, unknown conditional: 0, unknown unconditional: 1960] , Statistics on independence cache: Total cache size (in pairs): 347, Positive cache size: 326, Positive conditional cache size: 0, Positive unconditional cache size: 326, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8s, 161 PlacesBefore, 63 PlacesAfterwards, 153 TransitionsBefore, 50 TransitionsAfterwards, 6524 CoEnabledTransitionPairs, 7 FixpointIterations, 36 TrivialSequentialCompositions, 63 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 5 ChoiceCompositions, 119 TotalNumberOfCompositions, 20558 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7810, independent: 7482, independent conditional: 0, independent unconditional: 7482, dependent: 328, dependent conditional: 0, dependent unconditional: 328, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3354, independent: 3290, independent conditional: 0, independent unconditional: 3290, dependent: 64, dependent conditional: 0, dependent unconditional: 64, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7810, independent: 4192, independent conditional: 0, independent unconditional: 4192, dependent: 264, dependent conditional: 0, dependent unconditional: 264, unknown: 3354, unknown conditional: 0, unknown unconditional: 3354] , Statistics on independence cache: Total cache size (in pairs): 368, Positive cache size: 342, Positive conditional cache size: 0, Positive unconditional cache size: 342, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, 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_p1_EAX = 0; [L715] 0 int __unbuffered_p1_EBX = 0; [L716] 0 _Bool main$tmp_guard0; [L717] 0 _Bool main$tmp_guard1; [L719] 0 int x = 0; [L721] 0 int y = 0; [L722] 0 _Bool y$flush_delayed; [L723] 0 int y$mem_tmp; [L724] 0 _Bool y$r_buff0_thd0; [L725] 0 _Bool y$r_buff0_thd1; [L726] 0 _Bool y$r_buff0_thd2; [L727] 0 _Bool y$r_buff0_thd3; [L728] 0 _Bool y$r_buff1_thd0; [L729] 0 _Bool y$r_buff1_thd1; [L730] 0 _Bool y$r_buff1_thd2; [L731] 0 _Bool y$r_buff1_thd3; [L732] 0 _Bool y$read_delayed; [L733] 0 int *y$read_delayed_var; [L734] 0 int y$w_buff0; [L735] 0 _Bool y$w_buff0_used; [L736] 0 int y$w_buff1; [L737] 0 _Bool y$w_buff1_used; [L738] 0 _Bool weak$$choice0; [L739] 0 _Bool weak$$choice2; [L833] 0 pthread_t t1687[2]; [L834] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t1687={5:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=0, y$r_buff0_thd3=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$r_buff1_thd3=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=0, y$w_buff0_used=0, y$w_buff1=0, y$w_buff1_used=0, y=0] [L834] COND TRUE 0 asdf<2 [L834] FCALL, FORK 0 pthread_create(&t1687[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1687[asdf], ((void *)0), P0, ((void *)0))=-3, t1687={5:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=0, y$r_buff0_thd3=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$r_buff1_thd3=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=0, y$w_buff0_used=0, y$w_buff1=0, y$w_buff1_used=0, y=0] [L834] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t1687={5:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=0, y$r_buff0_thd3=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$r_buff1_thd3=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=0, y$w_buff0_used=0, y$w_buff1=0, y$w_buff1_used=0, y=0] [L834] COND TRUE 0 asdf<2 [L834] FCALL, FORK 0 pthread_create(&t1687[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1687[asdf], ((void *)0), P0, ((void *)0))=-2, t1687={5:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=0, y$r_buff0_thd3=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$r_buff1_thd3=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=0, y$w_buff0_used=0, y$w_buff1=0, y$w_buff1_used=0, y=0] [L834] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1687={5:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=0, y$r_buff0_thd3=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$r_buff1_thd3=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=0, y$w_buff0_used=0, y$w_buff1=0, y$w_buff1_used=0, y=0] [L834] COND FALSE 0 !(asdf<2) [L835] 0 pthread_t t1688[2]; [L836] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1687={5:0}, t1688={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=0, y$r_buff0_thd3=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$r_buff1_thd3=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=0, y$w_buff0_used=0, y$w_buff1=0, y$w_buff1_used=0, y=0] [L836] COND TRUE 0 asdf<2 [L836] FCALL, FORK 0 pthread_create(&t1688[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1688[asdf], ((void *)0), P1, ((void *)0))=-1, t1687={5:0}, t1688={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=0, y$r_buff0_thd3=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$r_buff1_thd3=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=0, y$w_buff0_used=0, y$w_buff1=0, y$w_buff1_used=0, y=0] [L763] 3 y$w_buff1 = y$w_buff0 [L764] 3 y$w_buff0 = 2 [L765] 3 y$w_buff1_used = y$w_buff0_used [L766] 3 y$w_buff0_used = (_Bool)1 [L767] CALL 3 __VERIFIER_assert(!(y$w_buff1_used && y$w_buff0_used)) [L18] COND FALSE 3 !(!expression) [L767] RET 3 __VERIFIER_assert(!(y$w_buff1_used && y$w_buff0_used)) [L768] 3 y$r_buff1_thd0 = y$r_buff0_thd0 [L769] 3 y$r_buff1_thd1 = y$r_buff0_thd1 [L770] 3 y$r_buff1_thd2 = y$r_buff0_thd2 [L771] 3 y$r_buff1_thd3 = y$r_buff0_thd3 [L772] 3 y$r_buff0_thd2 = (_Bool)1 VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=1, y$r_buff0_thd3=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$r_buff1_thd3=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=2, y$w_buff0_used=1, y$w_buff1=0, y$w_buff1_used=0, y=0] [L836] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t1687={5:0}, t1688={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=1, y$r_buff0_thd3=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$r_buff1_thd3=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=2, y$w_buff0_used=1, y$w_buff1=0, y$w_buff1_used=0, y=0] [L836] COND TRUE 0 asdf<2 [L836] FCALL, FORK 0 pthread_create(&t1688[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1688[asdf], ((void *)0), P1, ((void *)0))=0, t1687={5:0}, t1688={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=1, y$r_buff0_thd3=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$r_buff1_thd3=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=2, y$w_buff0_used=1, y$w_buff1=0, y$w_buff1_used=0, y=0] [L763] 4 y$w_buff1 = y$w_buff0 [L764] 4 y$w_buff0 = 2 [L765] 4 y$w_buff1_used = y$w_buff0_used [L766] 4 y$w_buff0_used = (_Bool)1 [L767] CALL 4 __VERIFIER_assert(!(y$w_buff1_used && y$w_buff0_used)) [L18] COND TRUE 4 !expression [L18] 4 reach_error() VAL [\old(expression)=0, __unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, expression=0, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y$flush_delayed=0, y$mem_tmp=0, y$r_buff0_thd0=0, y$r_buff0_thd1=0, y$r_buff0_thd2=1, y$r_buff0_thd3=0, y$r_buff1_thd0=0, y$r_buff1_thd1=0, y$r_buff1_thd2=0, y$r_buff1_thd3=0, y$read_delayed=0, y$read_delayed_var={0:0}, y$w_buff0=2, y$w_buff0_used=1, y$w_buff1=2, y$w_buff1_used=1, y=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, 150 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: 3.7s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 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, 175 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: 102.4s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 96.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 354 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 289 mSDsluCounter, 15 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 784 IncrementalHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 15 mSDtfsCounter, 784 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=161occurred 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, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 251 ConstructedInterpolants, 0 QuantifiedInterpolants, 421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1119 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 138/158 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, 175 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: 223.7s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 219.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 98 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 63 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 397 IncrementalHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 9 mSDtfsCounter, 397 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=175occurred in iteration=4, InterpolantAutomatonStates: 13, 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, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 68 NumberOfCodeBlocks, 68 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 53 ConstructedInterpolants, 0 QuantifiedInterpolants, 159 SizeOfPredicates, 0 NumberOfNonLiveVariables, 154 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 12/15 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! [2023-08-04 00:01:38,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...