/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_mix041_power.oepc_pso.oepc_rmo.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:42:20,441 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:42:20,492 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:42:20,497 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:42:20,497 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:42:20,497 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:42:20,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:42:20,522 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:42:20,522 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:42:20,523 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:42:20,523 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:42:20,523 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:42:20,523 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:42:20,524 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:42:20,524 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:42:20,524 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:42:20,526 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:42:20,528 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:42:20,529 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:42:20,529 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:42:20,530 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:42:20,530 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:42:20,530 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:42:20,530 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:42:20,531 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:42:20,531 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:42:20,531 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:42:20,532 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:42:20,532 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:42:20,532 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:42:20,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:42:20,533 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:42:20,533 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:42:20,533 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:42:20,533 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:42:20,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:42:20,533 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:42:20,533 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:42:20,533 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:42:20,534 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:42:20,534 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:42:20,534 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:42:20,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:42:20,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:42:20,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:42:20,737 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:42:20,737 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:42:20,738 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix041_power.oepc_pso.oepc_rmo.oepc_bound2.i [2023-08-03 23:42:21,746 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:42:21,980 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:42:21,981 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix041_power.oepc_pso.oepc_rmo.oepc_bound2.i [2023-08-03 23:42:21,996 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515bd5915/8f9c221a7f70499ca45a5c764055bf2d/FLAG19f0e8c78 [2023-08-03 23:42:22,349 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/515bd5915/8f9c221a7f70499ca45a5c764055bf2d [2023-08-03 23:42:22,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:42:22,352 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:42:22,354 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:42:22,355 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:42:22,357 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:42:22,357 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,358 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11e3c6a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22, skipping insertion in model container [2023-08-03 23:42:22,358 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,389 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:42:22,485 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_mix041_power.oepc_pso.oepc_rmo.oepc_bound2.i[969,982] [2023-08-03 23:42:22,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:42:22,616 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:42:22,629 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_mix041_power.oepc_pso.oepc_rmo.oepc_bound2.i[969,982] [2023-08-03 23:42:22,641 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:42:22,643 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:42:22,681 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:42:22,711 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:42:22,711 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:42:22,716 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:42:22,716 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22 WrapperNode [2023-08-03 23:42:22,717 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:42:22,718 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:42:22,718 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:42:22,718 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:42:22,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,749 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,779 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 130 [2023-08-03 23:42:22,779 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:42:22,780 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:42:22,780 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:42:22,780 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:42:22,788 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,806 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,806 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,812 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,815 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,816 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,819 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:42:22,819 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:42:22,819 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:42:22,819 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:42:22,833 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22" (1/1) ... [2023-08-03 23:42:22,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:42:22,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:42:22,886 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 23:42:22,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 23:42:22,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:42:22,912 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:42:22,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:42:22,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:42:22,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:42:22,914 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:42:22,914 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:42:22,915 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:42:22,915 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:42:22,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:42:22,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:42:22,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:42:22,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:42:22,917 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:42:23,040 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:42:23,042 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:42:23,253 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:42:23,324 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:42:23,324 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-03 23:42:23,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:42:23 BoogieIcfgContainer [2023-08-03 23:42:23,325 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:42:23,327 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:42:23,327 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:42:23,329 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:42:23,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:42:22" (1/3) ... [2023-08-03 23:42:23,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eca609a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:42:23, skipping insertion in model container [2023-08-03 23:42:23,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:42:22" (2/3) ... [2023-08-03 23:42:23,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eca609a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:42:23, skipping insertion in model container [2023-08-03 23:42:23,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:42:23" (3/3) ... [2023-08-03 23:42:23,330 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix041_power.oepc_pso.oepc_rmo.oepc_bound2.i [2023-08-03 23:42:23,335 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:42:23,341 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:42:23,341 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:42:23,341 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:42:23,366 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:42:23,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 105 transitions, 220 flow [2023-08-03 23:42:23,428 INFO L124 PetriNetUnfolderBase]: 14/222 cut-off events. [2023-08-03 23:42:23,428 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:42:23,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 222 events. 14/222 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 631 event pairs, 0 based on Foata normal form. 0/197 useless extension candidates. Maximal degree in co-relation 131. Up to 8 conditions per place. [2023-08-03 23:42:23,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 105 transitions, 220 flow [2023-08-03 23:42:23,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 78 transitions, 166 flow [2023-08-03 23:42:23,436 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:42:23,442 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 82 places, 78 transitions, 166 flow [2023-08-03 23:42:23,443 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 82 places, 78 transitions, 166 flow [2023-08-03 23:42:23,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 78 transitions, 166 flow [2023-08-03 23:42:23,483 INFO L124 PetriNetUnfolderBase]: 2/114 cut-off events. [2023-08-03 23:42:23,483 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:42:23,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 114 events. 2/114 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 166 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 77. Up to 4 conditions per place. [2023-08-03 23:42:23,485 INFO L119 LiptonReduction]: Number of co-enabled transitions 724 [2023-08-03 23:42:25,676 INFO L134 LiptonReduction]: Checked pairs total: 1726 [2023-08-03 23:42:25,676 INFO L136 LiptonReduction]: Total number of compositions: 65 [2023-08-03 23:42:25,695 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:42:25,699 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;@2dc19fd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:42:25,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 23:42:25,703 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:42:25,703 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-03 23:42:25,703 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:42:25,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:42:25,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 23:42:25,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 23:42:25,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:42:25,707 INFO L85 PathProgramCache]: Analyzing trace with hash 425346884, now seen corresponding path program 1 times [2023-08-03 23:42:25,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:42:25,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566985632] [2023-08-03 23:42:25,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:25,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:42:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:42:25,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:42:25,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:42:25,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566985632] [2023-08-03 23:42:25,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566985632] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:42:25,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:42:25,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:42:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272185227] [2023-08-03 23:42:25,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:42:25,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:42:25,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:42:25,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:42:25,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:42:25,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 170 [2023-08-03 23:42:25,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:25,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:42:25,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 170 [2023-08-03 23:42:25,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:42:26,019 INFO L124 PetriNetUnfolderBase]: 72/160 cut-off events. [2023-08-03 23:42:26,020 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:42:26,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 160 events. 72/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 592 event pairs, 20 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 313. Up to 138 conditions per place. [2023-08-03 23:42:26,021 INFO L140 encePairwiseOnDemand]: 167/170 looper letters, 18 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-08-03 23:42:26,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 96 flow [2023-08-03 23:42:26,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:42:26,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:42:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-08-03 23:42:26,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2023-08-03 23:42:26,045 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-08-03 23:42:26,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-08-03 23:42:26,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:42:26,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-08-03 23:42:26,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:26,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:26,060 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:26,061 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 46 flow. Second operand 3 states and 285 transitions. [2023-08-03 23:42:26,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 96 flow [2023-08-03 23:42:26,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 96 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:42:26,064 INFO L231 Difference]: Finished difference. Result has 26 places, 18 transitions, 54 flow [2023-08-03 23:42:26,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2023-08-03 23:42:26,068 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 3 predicate places. [2023-08-03 23:42:26,068 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 54 flow [2023-08-03 23:42:26,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.33333333333333) internal successors, (268), 3 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:26,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:42:26,069 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:42:26,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:42:26,069 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 23:42:26,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:42:26,069 INFO L85 PathProgramCache]: Analyzing trace with hash 299984021, now seen corresponding path program 1 times [2023-08-03 23:42:26,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:42:26,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104941306] [2023-08-03 23:42:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:26,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:42:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:42:26,083 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:42:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:42:26,103 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:42:26,104 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:42:26,104 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 23:42:26,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 23:42:26,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:42:26,106 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 23:42:26,108 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (1/2) [2023-08-03 23:42:26,108 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:42:26,108 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:42:26,124 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:42:26,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 124 transitions, 272 flow [2023-08-03 23:42:26,158 INFO L124 PetriNetUnfolderBase]: 30/460 cut-off events. [2023-08-03 23:42:26,158 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 23:42:26,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 460 events. 30/460 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1975 event pairs, 0 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 332. Up to 18 conditions per place. [2023-08-03 23:42:26,159 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 124 transitions, 272 flow [2023-08-03 23:42:26,160 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 97 transitions, 218 flow [2023-08-03 23:42:26,160 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:42:26,160 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 97 transitions, 218 flow [2023-08-03 23:42:26,160 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 97 transitions, 218 flow [2023-08-03 23:42:26,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 97 transitions, 218 flow [2023-08-03 23:42:26,174 INFO L124 PetriNetUnfolderBase]: 3/217 cut-off events. [2023-08-03 23:42:26,174 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 23:42:26,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 250 conditions, 217 events. 3/217 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 561 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 170. Up to 9 conditions per place. [2023-08-03 23:42:26,176 INFO L119 LiptonReduction]: Number of co-enabled transitions 2092 [2023-08-03 23:42:28,164 INFO L134 LiptonReduction]: Checked pairs total: 7656 [2023-08-03 23:42:28,164 INFO L136 LiptonReduction]: Total number of compositions: 68 [2023-08-03 23:42:28,166 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:42:28,167 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;@2dc19fd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:42:28,167 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-03 23:42:28,170 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:42:28,170 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2023-08-03 23:42:28,171 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-03 23:42:28,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:42:28,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2023-08-03 23:42:28,171 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 23:42:28,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:42:28,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1362396846, now seen corresponding path program 1 times [2023-08-03 23:42:28,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:42:28,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924196016] [2023-08-03 23:42:28,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:28,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:42:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:42:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:42:28,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:42:28,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924196016] [2023-08-03 23:42:28,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924196016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:42:28,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:42:28,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:42:28,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906521855] [2023-08-03 23:42:28,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:42:28,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:42:28,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:42:28,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:42:28,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:42:28,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 192 [2023-08-03 23:42:28,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 35 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:28,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:42:28,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 192 [2023-08-03 23:42:28,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:42:28,829 INFO L124 PetriNetUnfolderBase]: 4712/7196 cut-off events. [2023-08-03 23:42:28,830 INFO L125 PetriNetUnfolderBase]: For 535/535 co-relation queries the response was YES. [2023-08-03 23:42:28,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14523 conditions, 7196 events. 4712/7196 cut-off events. For 535/535 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 44253 event pairs, 3180 based on Foata normal form. 0/6332 useless extension candidates. Maximal degree in co-relation 3259. Up to 6628 conditions per place. [2023-08-03 23:42:28,862 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 29 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2023-08-03 23:42:28,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 168 flow [2023-08-03 23:42:28,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:42:28,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:42:28,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 332 transitions. [2023-08-03 23:42:28,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2023-08-03 23:42:28,865 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 332 transitions. [2023-08-03 23:42:28,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 332 transitions. [2023-08-03 23:42:28,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:42:28,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 332 transitions. [2023-08-03 23:42:28,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:28,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:28,868 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 192.0) internal successors, (768), 4 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:28,868 INFO L175 Difference]: Start difference. First operand has 44 places, 35 transitions, 94 flow. Second operand 3 states and 332 transitions. [2023-08-03 23:42:28,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 168 flow [2023-08-03 23:42:28,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 41 transitions, 164 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-03 23:42:28,870 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 102 flow [2023-08-03 23:42:28,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-08-03 23:42:28,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-03 23:42:28,871 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 102 flow [2023-08-03 23:42:28,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:28,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:42:28,871 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:42:28,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:42:28,871 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 23:42:28,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:42:28,871 INFO L85 PathProgramCache]: Analyzing trace with hash -702395927, now seen corresponding path program 1 times [2023-08-03 23:42:28,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:42:28,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510057145] [2023-08-03 23:42:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:28,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:42:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:42:28,923 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 23:42:28,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:42:28,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510057145] [2023-08-03 23:42:28,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510057145] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:42:28,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:42:28,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-03 23:42:28,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499759461] [2023-08-03 23:42:28,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:42:28,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:42:28,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:42:28,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:42:28,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:42:28,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 192 [2023-08-03 23:42:28,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:28,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:42:28,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 192 [2023-08-03 23:42:28,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:42:29,533 INFO L124 PetriNetUnfolderBase]: 4672/7271 cut-off events. [2023-08-03 23:42:29,533 INFO L125 PetriNetUnfolderBase]: For 425/425 co-relation queries the response was YES. [2023-08-03 23:42:29,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14531 conditions, 7271 events. 4672/7271 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46024 event pairs, 1920 based on Foata normal form. 25/6512 useless extension candidates. Maximal degree in co-relation 3804. Up to 6499 conditions per place. [2023-08-03 23:42:29,571 INFO L140 encePairwiseOnDemand]: 188/192 looper letters, 36 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2023-08-03 23:42:29,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 49 transitions, 208 flow [2023-08-03 23:42:29,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:42:29,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:42:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 536 transitions. [2023-08-03 23:42:29,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2023-08-03 23:42:29,573 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 536 transitions. [2023-08-03 23:42:29,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 536 transitions. [2023-08-03 23:42:29,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:42:29,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 536 transitions. [2023-08-03 23:42:29,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.2) internal successors, (536), 5 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:29,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:29,578 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 192.0) internal successors, (1152), 6 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:29,578 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 102 flow. Second operand 5 states and 536 transitions. [2023-08-03 23:42:29,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 49 transitions, 208 flow [2023-08-03 23:42:29,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 49 transitions, 205 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:42:29,580 INFO L231 Difference]: Finished difference. Result has 50 places, 36 transitions, 116 flow [2023-08-03 23:42:29,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=50, PETRI_TRANSITIONS=36} [2023-08-03 23:42:29,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2023-08-03 23:42:29,582 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 36 transitions, 116 flow [2023-08-03 23:42:29,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 100.6) internal successors, (503), 5 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:29,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:42:29,583 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:42:29,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-03 23:42:29,583 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 23:42:29,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:42:29,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1892514120, now seen corresponding path program 1 times [2023-08-03 23:42:29,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:42:29,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40888775] [2023-08-03 23:42:29,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:29,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:42:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:42:29,650 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 23:42:29,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:42:29,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40888775] [2023-08-03 23:42:29,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40888775] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:42:29,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143063388] [2023-08-03 23:42:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:29,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:42:29,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:42:29,665 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 23:42:29,669 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 23:42:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:42:29,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:42:29,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:42:29,795 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 23:42:29,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:42:29,812 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 23:42:29,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143063388] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:42:29,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:42:29,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-03 23:42:29,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658101422] [2023-08-03 23:42:29,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:42:29,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:42:29,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:42:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:42:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 23:42:29,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 192 [2023-08-03 23:42:29,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 36 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:29,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:42:29,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 192 [2023-08-03 23:42:29,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:42:30,346 INFO L124 PetriNetUnfolderBase]: 4108/6287 cut-off events. [2023-08-03 23:42:30,346 INFO L125 PetriNetUnfolderBase]: For 505/505 co-relation queries the response was YES. [2023-08-03 23:42:30,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12656 conditions, 6287 events. 4108/6287 cut-off events. For 505/505 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 37681 event pairs, 1600 based on Foata normal form. 5/5584 useless extension candidates. Maximal degree in co-relation 3266. Up to 5631 conditions per place. [2023-08-03 23:42:30,384 INFO L140 encePairwiseOnDemand]: 189/192 looper letters, 36 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2023-08-03 23:42:30,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 48 transitions, 214 flow [2023-08-03 23:42:30,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:42:30,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:42:30,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 436 transitions. [2023-08-03 23:42:30,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5677083333333334 [2023-08-03 23:42:30,386 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 436 transitions. [2023-08-03 23:42:30,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 436 transitions. [2023-08-03 23:42:30,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:42:30,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 436 transitions. [2023-08-03 23:42:30,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:30,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 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 23:42:30,389 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 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 23:42:30,389 INFO L175 Difference]: Start difference. First operand has 50 places, 36 transitions, 116 flow. Second operand 4 states and 436 transitions. [2023-08-03 23:42:30,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 48 transitions, 214 flow [2023-08-03 23:42:30,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 209 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:42:30,392 INFO L231 Difference]: Finished difference. Result has 51 places, 35 transitions, 109 flow [2023-08-03 23:42:30,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=51, PETRI_TRANSITIONS=35} [2023-08-03 23:42:30,394 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2023-08-03 23:42:30,395 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 35 transitions, 109 flow [2023-08-03 23:42:30,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 101.0) internal successors, (404), 4 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:30,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:42:30,395 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:42:30,421 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 23:42:30,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:42:30,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 23:42:30,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:42:30,601 INFO L85 PathProgramCache]: Analyzing trace with hash -201571933, now seen corresponding path program 1 times [2023-08-03 23:42:30,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:42:30,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564832966] [2023-08-03 23:42:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:30,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:42:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:42:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:42:30,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:42:30,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564832966] [2023-08-03 23:42:30,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564832966] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:42:30,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498799665] [2023-08-03 23:42:30,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:30,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:42:30,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:42:30,676 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 23:42:30,719 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 23:42:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:42:30,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:42:30,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:42:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:42:30,787 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:42:30,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498799665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:42:30,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:42:30,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:42:30,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878643584] [2023-08-03 23:42:30,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:42:30,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:42:30,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:42:30,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:42:30,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:42:30,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 192 [2023-08-03 23:42:30,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 35 transitions, 109 flow. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:30,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:42:30,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 192 [2023-08-03 23:42:30,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:42:31,081 INFO L124 PetriNetUnfolderBase]: 2108/3393 cut-off events. [2023-08-03 23:42:31,081 INFO L125 PetriNetUnfolderBase]: For 526/526 co-relation queries the response was YES. [2023-08-03 23:42:31,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7067 conditions, 3393 events. 2108/3393 cut-off events. For 526/526 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 19065 event pairs, 443 based on Foata normal form. 625/3610 useless extension candidates. Maximal degree in co-relation 2553. Up to 2550 conditions per place. [2023-08-03 23:42:31,092 INFO L140 encePairwiseOnDemand]: 190/192 looper letters, 0 selfloop transitions, 0 changer transitions 54/54 dead transitions. [2023-08-03 23:42:31,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 54 transitions, 237 flow [2023-08-03 23:42:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:42:31,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:42:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 446 transitions. [2023-08-03 23:42:31,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807291666666666 [2023-08-03 23:42:31,094 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 446 transitions. [2023-08-03 23:42:31,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 446 transitions. [2023-08-03 23:42:31,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:42:31,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 446 transitions. [2023-08-03 23:42:31,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:31,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 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 23:42:31,097 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 192.0) internal successors, (960), 5 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 23:42:31,097 INFO L175 Difference]: Start difference. First operand has 51 places, 35 transitions, 109 flow. Second operand 4 states and 446 transitions. [2023-08-03 23:42:31,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 54 transitions, 237 flow [2023-08-03 23:42:31,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 54 transitions, 230 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:42:31,102 INFO L231 Difference]: Finished difference. Result has 49 places, 0 transitions, 0 flow [2023-08-03 23:42:31,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=192, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=49, PETRI_TRANSITIONS=0} [2023-08-03 23:42:31,104 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-08-03 23:42:31,104 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 0 transitions, 0 flow [2023-08-03 23:42:31,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:31,105 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-03 23:42:31,105 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-03 23:42:31,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:42:31,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-03 23:42:31,310 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-03 23:42:31,311 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE (1/2) [2023-08-03 23:42:31,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 124 transitions, 272 flow [2023-08-03 23:42:31,343 INFO L124 PetriNetUnfolderBase]: 30/460 cut-off events. [2023-08-03 23:42:31,343 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 23:42:31,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 460 events. 30/460 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1975 event pairs, 0 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 332. Up to 18 conditions per place. [2023-08-03 23:42:31,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 129 places, 124 transitions, 272 flow [2023-08-03 23:42:31,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 124 transitions, 272 flow [2023-08-03 23:42:31,346 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:42:31,346 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 124 transitions, 272 flow [2023-08-03 23:42:31,346 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 124 transitions, 272 flow [2023-08-03 23:42:31,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 124 transitions, 272 flow [2023-08-03 23:42:31,368 INFO L124 PetriNetUnfolderBase]: 30/460 cut-off events. [2023-08-03 23:42:31,368 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 23:42:31,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 493 conditions, 460 events. 30/460 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1975 event pairs, 0 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 332. Up to 18 conditions per place. [2023-08-03 23:42:31,374 INFO L119 LiptonReduction]: Number of co-enabled transitions 3928 [2023-08-03 23:42:33,633 INFO L134 LiptonReduction]: Checked pairs total: 13237 [2023-08-03 23:42:33,633 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-03 23:42:33,635 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:42:33,635 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;@2dc19fd3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:42:33,635 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:42:33,636 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:42:33,639 INFO L124 PetriNetUnfolderBase]: 1/11 cut-off events. [2023-08-03 23:42:33,639 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:42:33,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:42:33,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 23:42:33,639 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:42:33,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:42:33,639 INFO L85 PathProgramCache]: Analyzing trace with hash 23191513, now seen corresponding path program 1 times [2023-08-03 23:42:33,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:42:33,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889638363] [2023-08-03 23:42:33,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:33,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:42:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:42:33,679 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 23:42:33,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:42:33,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889638363] [2023-08-03 23:42:33,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889638363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:42:33,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:42:33,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 23:42:33,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071091299] [2023-08-03 23:42:33,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:42:33,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:42:33,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:42:33,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:42:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:42:33,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 221 [2023-08-03 23:42:33,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:33,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:42:33,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 221 [2023-08-03 23:42:33,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:42:35,831 INFO L124 PetriNetUnfolderBase]: 20420/29920 cut-off events. [2023-08-03 23:42:35,831 INFO L125 PetriNetUnfolderBase]: For 443/443 co-relation queries the response was YES. [2023-08-03 23:42:35,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58425 conditions, 29920 events. 20420/29920 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 1168. Compared 205980 event pairs, 3926 based on Foata normal form. 837/26025 useless extension candidates. Maximal degree in co-relation 49657. Up to 26049 conditions per place. [2023-08-03 23:42:35,955 INFO L140 encePairwiseOnDemand]: 215/221 looper letters, 53 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2023-08-03 23:42:35,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 66 transitions, 281 flow [2023-08-03 23:42:35,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:42:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:42:35,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-03 23:42:35,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565610859728507 [2023-08-03 23:42:35,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-03 23:42:35,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-03 23:42:35,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:42:35,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-03 23:42:35,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:35,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:35,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:35,958 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 110 flow. Second operand 3 states and 369 transitions. [2023-08-03 23:42:35,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 66 transitions, 281 flow [2023-08-03 23:42:35,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 277 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-03 23:42:35,960 INFO L231 Difference]: Finished difference. Result has 54 places, 44 transitions, 125 flow [2023-08-03 23:42:35,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=54, PETRI_TRANSITIONS=44} [2023-08-03 23:42:35,961 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-03 23:42:35,961 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 44 transitions, 125 flow [2023-08-03 23:42:35,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:35,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:42:35,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:42:35,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-03 23:42:35,962 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:42:35,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:42:35,962 INFO L85 PathProgramCache]: Analyzing trace with hash 809232754, now seen corresponding path program 1 times [2023-08-03 23:42:35,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:42:35,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014730829] [2023-08-03 23:42:35,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:35,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:42:35,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:42:35,986 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 23:42:35,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:42:35,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014730829] [2023-08-03 23:42:35,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014730829] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:42:35,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:42:35,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:42:35,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219894879] [2023-08-03 23:42:35,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:42:35,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:42:35,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:42:35,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:42:35,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:42:35,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 221 [2023-08-03 23:42:35,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 44 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:35,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:42:35,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 221 [2023-08-03 23:42:35,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:42:38,199 INFO L124 PetriNetUnfolderBase]: 20048/29256 cut-off events. [2023-08-03 23:42:38,199 INFO L125 PetriNetUnfolderBase]: For 2906/2906 co-relation queries the response was YES. [2023-08-03 23:42:38,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62217 conditions, 29256 events. 20048/29256 cut-off events. For 2906/2906 co-relation queries the response was YES. Maximal size of possible extension queue 1128. Compared 194856 event pairs, 15274 based on Foata normal form. 0/24484 useless extension candidates. Maximal degree in co-relation 40370. Up to 27351 conditions per place. [2023-08-03 23:42:38,295 INFO L140 encePairwiseOnDemand]: 218/221 looper letters, 37 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2023-08-03 23:42:38,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 49 transitions, 216 flow [2023-08-03 23:42:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:42:38,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:42:38,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-03 23:42:38,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2023-08-03 23:42:38,297 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-03 23:42:38,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-03 23:42:38,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:42:38,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-03 23:42:38,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:38,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:38,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 221.0) internal successors, (884), 4 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:38,299 INFO L175 Difference]: Start difference. First operand has 54 places, 44 transitions, 125 flow. Second operand 3 states and 338 transitions. [2023-08-03 23:42:38,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 49 transitions, 216 flow [2023-08-03 23:42:38,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 212 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:42:38,301 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 134 flow [2023-08-03 23:42:38,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=221, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-08-03 23:42:38,302 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-03 23:42:38,302 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 134 flow [2023-08-03 23:42:38,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:42:38,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:42:38,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:42:38,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-03 23:42:38,302 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:42:38,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:42:38,303 INFO L85 PathProgramCache]: Analyzing trace with hash -933813823, now seen corresponding path program 1 times [2023-08-03 23:42:38,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:42:38,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542216935] [2023-08-03 23:42:38,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:42:38,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:42:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:42:38,313 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:42:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:42:38,336 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:42:38,336 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:42:38,336 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-03 23:42:38,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 23:42:38,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-03 23:42:38,336 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 23:42:38,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-03 23:42:38,336 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-03 23:42:38,338 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-03 23:42:38,340 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 23:42:38,341 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 23:42:38,379 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 11:42:38 BasicIcfg [2023-08-03 23:42:38,379 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 23:42:38,380 INFO L158 Benchmark]: Toolchain (without parser) took 16027.62ms. Allocated memory was 419.4MB in the beginning and 1.9GB in the end (delta: 1.5GB). Free memory was 381.3MB in the beginning and 1.3GB in the end (delta: -928.7MB). Peak memory consumption was 549.3MB. Max. memory is 16.0GB. [2023-08-03 23:42:38,380 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 348.1MB. Free memory is still 303.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 23:42:38,380 INFO L158 Benchmark]: CACSL2BoogieTranslator took 362.76ms. Allocated memory is still 419.4MB. Free memory was 380.8MB in the beginning and 358.3MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-03 23:42:38,380 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.72ms. Allocated memory is still 419.4MB. Free memory was 357.8MB in the beginning and 355.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 23:42:38,380 INFO L158 Benchmark]: Boogie Preprocessor took 38.73ms. Allocated memory is still 419.4MB. Free memory was 355.6MB in the beginning and 353.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 23:42:38,381 INFO L158 Benchmark]: RCFGBuilder took 506.05ms. Allocated memory is still 419.4MB. Free memory was 353.6MB in the beginning and 320.0MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. [2023-08-03 23:42:38,381 INFO L158 Benchmark]: TraceAbstraction took 15052.76ms. Allocated memory was 419.4MB in the beginning and 1.9GB in the end (delta: 1.5GB). Free memory was 319.0MB in the beginning and 1.3GB in the end (delta: -991.0MB). Peak memory consumption was 488.5MB. Max. memory is 16.0GB. [2023-08-03 23:42:38,382 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 348.1MB. Free memory is still 303.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 362.76ms. Allocated memory is still 419.4MB. Free memory was 380.8MB in the beginning and 358.3MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 61.72ms. Allocated memory is still 419.4MB. Free memory was 357.8MB in the beginning and 355.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 38.73ms. Allocated memory is still 419.4MB. Free memory was 355.6MB in the beginning and 353.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 506.05ms. Allocated memory is still 419.4MB. Free memory was 353.6MB in the beginning and 320.0MB in the end (delta: 33.6MB). Peak memory consumption was 33.6MB. Max. memory is 16.0GB. * TraceAbstraction took 15052.76ms. Allocated memory was 419.4MB in the beginning and 1.9GB in the end (delta: 1.5GB). Free memory was 319.0MB in the beginning and 1.3GB in the end (delta: -991.0MB). Peak memory consumption was 488.5MB. 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: 2.2s, 82 PlacesBefore, 23 PlacesAfterwards, 78 TransitionsBefore, 18 TransitionsAfterwards, 724 CoEnabledTransitionPairs, 7 FixpointIterations, 34 TrivialSequentialCompositions, 22 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 65 TotalNumberOfCompositions, 1726 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 918, independent: 824, independent conditional: 0, independent unconditional: 824, dependent: 94, dependent conditional: 0, dependent unconditional: 94, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 375, independent: 362, independent conditional: 0, independent unconditional: 362, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 918, independent: 462, independent conditional: 0, independent unconditional: 462, dependent: 81, dependent conditional: 0, dependent unconditional: 81, unknown: 375, unknown conditional: 0, unknown unconditional: 375] , Statistics on independence cache: Total cache size (in pairs): 40, Positive cache size: 35, Positive conditional cache size: 0, Positive unconditional cache size: 35, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.0s, 105 PlacesBefore, 44 PlacesAfterwards, 97 TransitionsBefore, 35 TransitionsAfterwards, 2092 CoEnabledTransitionPairs, 6 FixpointIterations, 34 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 1 ChoiceCompositions, 68 TotalNumberOfCompositions, 7656 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3201, independent: 2976, independent conditional: 0, independent unconditional: 2976, dependent: 225, dependent conditional: 0, dependent unconditional: 225, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1014, independent: 982, independent conditional: 0, independent unconditional: 982, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3201, independent: 1994, independent conditional: 0, independent unconditional: 1994, dependent: 193, dependent conditional: 0, dependent unconditional: 193, unknown: 1014, unknown conditional: 0, unknown unconditional: 1014] , Statistics on independence cache: Total cache size (in pairs): 209, Positive cache size: 193, Positive conditional cache size: 0, Positive unconditional cache size: 193, Negative cache size: 16, Negative conditional cache size: 0, Negative unconditional cache size: 16, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 129 PlacesBefore, 51 PlacesAfterwards, 124 TransitionsBefore, 43 TransitionsAfterwards, 3928 CoEnabledTransitionPairs, 6 FixpointIterations, 34 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 3 ChoiceCompositions, 97 TotalNumberOfCompositions, 13237 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5089, independent: 4823, independent conditional: 0, independent unconditional: 4823, dependent: 266, dependent conditional: 0, dependent unconditional: 266, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1957, independent: 1914, independent conditional: 0, independent unconditional: 1914, dependent: 43, dependent conditional: 0, dependent unconditional: 43, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5089, independent: 2909, independent conditional: 0, independent unconditional: 2909, dependent: 223, dependent conditional: 0, dependent unconditional: 223, unknown: 1957, unknown conditional: 0, unknown unconditional: 1957] , Statistics on independence cache: Total cache size (in pairs): 269, Positive cache size: 248, Positive conditional cache size: 0, Positive unconditional cache size: 248, 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 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L708] 0 int __unbuffered_cnt = 0; [L710] 0 int __unbuffered_p1_EAX = 0; [L712] 0 int __unbuffered_p1_EBX = 0; [L713] 0 _Bool main$tmp_guard0; [L714] 0 _Bool main$tmp_guard1; [L716] 0 int x = 0; [L718] 0 int y = 0; [L720] 0 int z = 0; [L721] 0 _Bool z$flush_delayed; [L722] 0 int z$mem_tmp; [L723] 0 _Bool z$r_buff0_thd0; [L724] 0 _Bool z$r_buff0_thd1; [L725] 0 _Bool z$r_buff0_thd2; [L726] 0 _Bool z$r_buff1_thd0; [L727] 0 _Bool z$r_buff1_thd1; [L728] 0 _Bool z$r_buff1_thd2; [L729] 0 _Bool z$read_delayed; [L730] 0 int *z$read_delayed_var; [L731] 0 int z$w_buff0; [L732] 0 _Bool z$w_buff0_used; [L733] 0 int z$w_buff1; [L734] 0 _Bool z$w_buff1_used; [L735] 0 _Bool weak$$choice0; [L736] 0 _Bool weak$$choice2; [L815] 0 pthread_t t1089[2]; [L816] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t1089={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=0, z$w_buff0_used=0, z$w_buff1=0, z$w_buff1_used=0, z=0] [L816] COND TRUE 0 asdf<2 [L816] FCALL, FORK 0 pthread_create(&t1089[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1089[asdf], ((void *)0), P0, ((void *)0))=-2, t1089={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=0, z$r_buff0_thd2=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=0, z$w_buff0_used=0, z$w_buff1=0, z$w_buff1_used=0, z=0] [L740] 1 z$w_buff1 = z$w_buff0 [L741] 1 z$w_buff0 = 1 [L742] 1 z$w_buff1_used = z$w_buff0_used [L743] 1 z$w_buff0_used = (_Bool)1 [L744] CALL 1 __VERIFIER_assert(!(z$w_buff1_used && z$w_buff0_used)) [L18] COND FALSE 1 !(!expression) [L744] RET 1 __VERIFIER_assert(!(z$w_buff1_used && z$w_buff0_used)) [L745] 1 z$r_buff1_thd0 = z$r_buff0_thd0 [L746] 1 z$r_buff1_thd1 = z$r_buff0_thd1 [L747] 1 z$r_buff1_thd2 = z$r_buff0_thd2 [L748] 1 z$r_buff0_thd1 = (_Bool)1 VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=1, z$r_buff0_thd2=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=1, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L816] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t1089={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=1, z$r_buff0_thd2=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=1, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L816] COND TRUE 0 asdf<2 [L816] FCALL, FORK 0 pthread_create(&t1089[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1089[asdf], ((void *)0), P0, ((void *)0))=-1, t1089={3:0}, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=1, z$r_buff0_thd2=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=1, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L740] 2 z$w_buff1 = z$w_buff0 [L741] 2 z$w_buff0 = 1 [L742] 2 z$w_buff1_used = z$w_buff0_used [L743] 2 z$w_buff0_used = (_Bool)1 [L744] CALL 2 __VERIFIER_assert(!(z$w_buff1_used && z$w_buff0_used)) [L18] COND TRUE 2 !expression [L18] 2 reach_error() VAL [\old(expression)=0, __unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, expression=0, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=1, z$r_buff0_thd2=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$read_delayed=0, z$read_delayed_var={0:0}, z$w_buff0=1, z$w_buff0_used=1, z$w_buff1=1, z$w_buff1_used=1, z=0] - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 5 procedures, 121 locations, 5 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: 2.7s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 36 IncrementalHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 36 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=54occurred 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, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 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 7 procedures, 140 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: 5.2s, OverallIterations: 4, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 166 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 134 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 312 IncrementalHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 1 mSDtfsCounter, 312 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=116occurred in iteration=2, InterpolantAutomatonStates: 16, 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, 0.3s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 86 ConstructedInterpolants, 0 QuantifiedInterpolants, 160 SizeOfPredicates, 0 NumberOfNonLiveVariables, 342 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 7 InterpolantComputations, 3 PerfectInterpolantSequences, 47/53 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 7 procedures, 140 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: 7.0s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 33 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 25 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 10 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 132 IncrementalHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 10 mSolverCounterUnsat, 1 mSDtfsCounter, 132 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=134occurred in iteration=2, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-03 23:42:38,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...