/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_mix016.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:17:14,511 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:17:14,591 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:17:14,596 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:17:14,597 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:17:14,597 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:17:14,597 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:17:14,627 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:17:14,627 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:17:14,631 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:17:14,631 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:17:14,631 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:17:14,632 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:17:14,633 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:17:14,633 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:17:14,634 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:17:14,634 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:17:14,634 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:17:14,634 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:17:14,634 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:17:14,634 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:17:14,635 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:17:14,635 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:17:14,635 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:17:14,636 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:17:14,637 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:17:14,637 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:17:14,637 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:17:14,637 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:17:14,638 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:17:14,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:17:14,639 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:17:14,639 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:17:14,639 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:17:14,639 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:17:14,639 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:17:14,639 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:17:14,639 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:17:14,640 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:17:14,640 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:17:14,640 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:17:14,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:17:14,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:17:14,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:17:14,892 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:17:14,892 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:17:14,893 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:17:14,894 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix016.oepc_bound2.i [2023-08-03 23:17:16,107 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:17:16,345 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:17:16,346 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix016.oepc_bound2.i [2023-08-03 23:17:16,365 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a1735dc/adbe5d96ef294ce983b71b2bd76cf00e/FLAGaab39f4d9 [2023-08-03 23:17:16,381 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89a1735dc/adbe5d96ef294ce983b71b2bd76cf00e [2023-08-03 23:17:16,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:17:16,384 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:17:16,385 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:17:16,385 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:17:16,392 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:17:16,393 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,394 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@371f5c2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16, skipping insertion in model container [2023-08-03 23:17:16,394 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,436 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:17:16,556 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_mix016.oepc_bound2.i[945,958] [2023-08-03 23:17:16,732 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:17:16,746 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:17:16,756 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_mix016.oepc_bound2.i[945,958] [2023-08-03 23:17:16,779 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:17:16,780 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:17:16,832 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:17:16,858 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:17:16,858 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:17:16,864 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:17:16,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16 WrapperNode [2023-08-03 23:17:16,865 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:17:16,866 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:17:16,866 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:17:16,866 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:17:16,872 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,893 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,914 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 154 [2023-08-03 23:17:16,914 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:17:16,915 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:17:16,915 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:17:16,915 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:17:16,923 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,923 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,926 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,927 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,937 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,941 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,943 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,944 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,947 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:17:16,948 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:17:16,948 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:17:16,948 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:17:16,949 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16" (1/1) ... [2023-08-03 23:17:16,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:17:16,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:17:16,986 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 23:17:17,015 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 23:17:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:17:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:17:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:17:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:17:17,028 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:17:17,030 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:17:17,030 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:17:17,031 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:17:17,031 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:17:17,031 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:17:17,031 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:17:17,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:17:17,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:17:17,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:17:17,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:17:17,033 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 23:17:17,182 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:17:17,184 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:17:17,465 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:17:17,598 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:17:17,598 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:17:17,601 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:17:17 BoogieIcfgContainer [2023-08-03 23:17:17,601 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:17:17,603 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:17:17,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:17:17,607 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:17:17,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:17:16" (1/3) ... [2023-08-03 23:17:17,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ae1851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:17:17, skipping insertion in model container [2023-08-03 23:17:17,609 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:17:16" (2/3) ... [2023-08-03 23:17:17,610 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77ae1851 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:17:17, skipping insertion in model container [2023-08-03 23:17:17,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:17:17" (3/3) ... [2023-08-03 23:17:17,611 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix016.oepc_bound2.i [2023-08-03 23:17:17,618 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:17:17,625 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:17:17,626 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:17:17,626 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:17:17,673 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:17:17,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 132 transitions, 279 flow [2023-08-03 23:17:17,875 INFO L124 PetriNetUnfolderBase]: 30/454 cut-off events. [2023-08-03 23:17:17,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:17:17,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 479 conditions, 454 events. 30/454 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2017 event pairs, 0 based on Foata normal form. 0/401 useless extension candidates. Maximal degree in co-relation 271. Up to 16 conditions per place. [2023-08-03 23:17:17,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 132 transitions, 279 flow [2023-08-03 23:17:17,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 103 transitions, 221 flow [2023-08-03 23:17:17,891 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:17:17,911 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 103 transitions, 221 flow [2023-08-03 23:17:17,913 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 103 transitions, 221 flow [2023-08-03 23:17:17,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 103 transitions, 221 flow [2023-08-03 23:17:17,945 INFO L124 PetriNetUnfolderBase]: 6/222 cut-off events. [2023-08-03 23:17:17,945 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:17:17,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 247 conditions, 222 events. 6/222 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 664 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 155. Up to 8 conditions per place. [2023-08-03 23:17:17,949 INFO L119 LiptonReduction]: Number of co-enabled transitions 1502 [2023-08-03 23:17:21,071 INFO L134 LiptonReduction]: Checked pairs total: 3874 [2023-08-03 23:17:21,072 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-03 23:17:21,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:17:21,101 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;@378fd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:17:21,102 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:17:21,108 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:17:21,108 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-03 23:17:21,108 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:17:21,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:21,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:17:21,109 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:17:21,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:21,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1162548941, now seen corresponding path program 1 times [2023-08-03 23:17:21,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:21,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174532862] [2023-08-03 23:17:21,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:21,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:21,388 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 23:17:21,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:17:21,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174532862] [2023-08-03 23:17:21,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174532862] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:17:21,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:17:21,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:17:21,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555979989] [2023-08-03 23:17:21,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:17:21,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:17:21,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:17:21,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:17:21,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:17:21,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 214 [2023-08-03 23:17:21,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:21,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:17:21,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 214 [2023-08-03 23:17:21,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:17:21,644 INFO L124 PetriNetUnfolderBase]: 579/997 cut-off events. [2023-08-03 23:17:21,645 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-03 23:17:21,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2035 conditions, 997 events. 579/997 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4699 event pairs, 295 based on Foata normal form. 0/885 useless extension candidates. Maximal degree in co-relation 2012. Up to 935 conditions per place. [2023-08-03 23:17:21,653 INFO L140 encePairwiseOnDemand]: 211/214 looper letters, 25 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 23:17:21,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 133 flow [2023-08-03 23:17:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:17:21,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:17:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 364 transitions. [2023-08-03 23:17:21,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5669781931464174 [2023-08-03 23:17:21,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 364 transitions. [2023-08-03 23:17:21,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 364 transitions. [2023-08-03 23:17:21,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:17:21,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 364 transitions. [2023-08-03 23:17:21,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.33333333333333) internal successors, (364), 3 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:21,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:21,685 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:21,686 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 69 flow. Second operand 3 states and 364 transitions. [2023-08-03 23:17:21,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 133 flow [2023-08-03 23:17:21,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 133 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:17:21,690 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 77 flow [2023-08-03 23:17:21,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-03 23:17:21,694 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-03 23:17:21,695 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 77 flow [2023-08-03 23:17:21,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:21,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:21,695 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:17:21,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:17:21,696 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:17:21,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:21,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1167481256, now seen corresponding path program 1 times [2023-08-03 23:17:21,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:21,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156760230] [2023-08-03 23:17:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:21,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:17:21,719 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:17:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:17:21,752 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:17:21,752 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:17:21,754 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:17:21,755 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:17:21,756 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:17:21,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:17:21,756 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 23:17:21,758 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:17:21,759 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:17:21,759 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:17:21,795 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:17:21,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 158 transitions, 352 flow [2023-08-03 23:17:21,970 INFO L124 PetriNetUnfolderBase]: 93/1397 cut-off events. [2023-08-03 23:17:21,970 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:17:21,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 1397 events. 93/1397 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9653 event pairs, 0 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 1011. Up to 54 conditions per place. [2023-08-03 23:17:21,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 158 transitions, 352 flow [2023-08-03 23:17:21,978 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 129 transitions, 294 flow [2023-08-03 23:17:21,978 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:17:21,978 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 129 transitions, 294 flow [2023-08-03 23:17:21,979 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 129 transitions, 294 flow [2023-08-03 23:17:21,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 129 transitions, 294 flow [2023-08-03 23:17:22,039 INFO L124 PetriNetUnfolderBase]: 12/614 cut-off events. [2023-08-03 23:17:22,039 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:17:22,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 614 events. 12/614 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3160 event pairs, 0 based on Foata normal form. 0/588 useless extension candidates. Maximal degree in co-relation 489. Up to 27 conditions per place. [2023-08-03 23:17:22,051 INFO L119 LiptonReduction]: Number of co-enabled transitions 4200 [2023-08-03 23:17:24,879 INFO L134 LiptonReduction]: Checked pairs total: 14427 [2023-08-03 23:17:24,880 INFO L136 LiptonReduction]: Total number of compositions: 88 [2023-08-03 23:17:24,881 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:17:24,882 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;@378fd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:17:24,883 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:17:24,891 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:17:24,891 INFO L124 PetriNetUnfolderBase]: 0/68 cut-off events. [2023-08-03 23:17:24,891 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-03 23:17:24,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:24,891 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:17:24,892 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:17:24,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:24,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1568289894, now seen corresponding path program 1 times [2023-08-03 23:17:24,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:24,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804810756] [2023-08-03 23:17:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:24,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:24,957 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 23:17:24,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:17:24,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804810756] [2023-08-03 23:17:24,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804810756] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:17:24,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:17:24,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:17:24,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552417160] [2023-08-03 23:17:24,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:17:24,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:17:24,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:17:24,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:17:24,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:17:24,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 246 [2023-08-03 23:17:24,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 48 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:24,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:17:24,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 246 [2023-08-03 23:17:24,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:17:43,040 INFO L124 PetriNetUnfolderBase]: 150910/199409 cut-off events. [2023-08-03 23:17:43,040 INFO L125 PetriNetUnfolderBase]: For 10735/10735 co-relation queries the response was YES. [2023-08-03 23:17:43,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403306 conditions, 199409 events. 150910/199409 cut-off events. For 10735/10735 co-relation queries the response was YES. Maximal size of possible extension queue 5457. Compared 1330827 event pairs, 118610 based on Foata normal form. 0/181613 useless extension candidates. Maximal degree in co-relation 85153. Up to 191286 conditions per place. [2023-08-03 23:17:44,190 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 40 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-03 23:17:44,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 54 transitions, 228 flow [2023-08-03 23:17:44,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:17:44,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:17:44,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 430 transitions. [2023-08-03 23:17:44,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2023-08-03 23:17:44,193 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 430 transitions. [2023-08-03 23:17:44,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 430 transitions. [2023-08-03 23:17:44,194 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:17:44,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 430 transitions. [2023-08-03 23:17:44,195 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:44,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:44,198 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:44,198 INFO L175 Difference]: Start difference. First operand has 61 places, 48 transitions, 132 flow. Second operand 3 states and 430 transitions. [2023-08-03 23:17:44,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 54 transitions, 228 flow [2023-08-03 23:17:44,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 54 transitions, 222 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:17:44,209 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 138 flow [2023-08-03 23:17:44,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2023-08-03 23:17:44,210 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2023-08-03 23:17:44,210 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 138 flow [2023-08-03 23:17:44,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:44,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:44,211 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:17:44,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:17:44,211 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:17:44,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:44,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2041636970, now seen corresponding path program 1 times [2023-08-03 23:17:44,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:44,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201125800] [2023-08-03 23:17:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:44,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:17:44,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:17:44,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201125800] [2023-08-03 23:17:44,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201125800] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:17:44,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864010794] [2023-08-03 23:17:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:44,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:17:44,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:17:44,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:17:44,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:17:44,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:17:44,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:17:44,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:17:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:17:44,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:17:44,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864010794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:17:44,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:17:44,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:17:44,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613938678] [2023-08-03 23:17:44,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:17:44,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:17:44,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:17:44,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:17:44,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:17:44,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 246 [2023-08-03 23:17:44,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:44,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:17:44,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 246 [2023-08-03 23:17:44,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:00,738 INFO L124 PetriNetUnfolderBase]: 150870/199399 cut-off events. [2023-08-03 23:18:00,738 INFO L125 PetriNetUnfolderBase]: For 9965/9965 co-relation queries the response was YES. [2023-08-03 23:18:01,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402569 conditions, 199399 events. 150870/199399 cut-off events. For 9965/9965 co-relation queries the response was YES. Maximal size of possible extension queue 5462. Compared 1335448 event pairs, 91710 based on Foata normal form. 25/181658 useless extension candidates. Maximal degree in co-relation 99872. Up to 191157 conditions per place. [2023-08-03 23:18:01,942 INFO L140 encePairwiseOnDemand]: 242/246 looper letters, 47 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2023-08-03 23:18:01,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 266 flow [2023-08-03 23:18:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:18:01,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:18:01,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 692 transitions. [2023-08-03 23:18:01,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5626016260162602 [2023-08-03 23:18:01,944 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 692 transitions. [2023-08-03 23:18:01,945 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 692 transitions. [2023-08-03 23:18:01,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:18:01,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 692 transitions. [2023-08-03 23:18:01,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 138.4) internal successors, (692), 5 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:01,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:01,950 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:01,950 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 138 flow. Second operand 5 states and 692 transitions. [2023-08-03 23:18:01,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 266 flow [2023-08-03 23:18:01,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 62 transitions, 263 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:18:01,952 INFO L231 Difference]: Finished difference. Result has 67 places, 49 transitions, 152 flow [2023-08-03 23:18:01,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=67, PETRI_TRANSITIONS=49} [2023-08-03 23:18:01,953 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 6 predicate places. [2023-08-03 23:18:01,953 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 49 transitions, 152 flow [2023-08-03 23:18:01,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.6) internal successors, (648), 5 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:01,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:01,954 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:18:01,964 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 23:18:02,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:02,159 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:18:02,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:02,160 INFO L85 PathProgramCache]: Analyzing trace with hash 229487459, now seen corresponding path program 1 times [2023-08-03 23:18:02,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:02,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809260751] [2023-08-03 23:18:02,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:02,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:02,209 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 23:18:02,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:02,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809260751] [2023-08-03 23:18:02,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809260751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:18:02,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016943134] [2023-08-03 23:18:02,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:02,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:02,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:18:02,221 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 23:18:02,224 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 23:18:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:02,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:18:02,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:18:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:18:02,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:18:02,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016943134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:18:02,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:18:02,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:18:02,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889944174] [2023-08-03 23:18:02,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:18:02,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:18:02,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:02,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:18:02,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:18:02,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 246 [2023-08-03 23:18:02,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 49 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:02,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:02,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 246 [2023-08-03 23:18:02,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:17,517 INFO L124 PetriNetUnfolderBase]: 146266/193511 cut-off events. [2023-08-03 23:18:17,518 INFO L125 PetriNetUnfolderBase]: For 9275/9275 co-relation queries the response was YES. [2023-08-03 23:18:17,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390670 conditions, 193511 events. 146266/193511 cut-off events. For 9275/9275 co-relation queries the response was YES. Maximal size of possible extension queue 5523. Compared 1297353 event pairs, 117292 based on Foata normal form. 0/177196 useless extension candidates. Maximal degree in co-relation 125919. Up to 184350 conditions per place. [2023-08-03 23:18:18,784 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 48 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-08-03 23:18:18,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 62 transitions, 280 flow [2023-08-03 23:18:18,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:18:18,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:18:18,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2023-08-03 23:18:18,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.592140921409214 [2023-08-03 23:18:18,785 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2023-08-03 23:18:18,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2023-08-03 23:18:18,786 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:18:18,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2023-08-03 23:18:18,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:18,789 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:18,789 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 246.0) internal successors, (984), 4 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:18,789 INFO L175 Difference]: Start difference. First operand has 67 places, 49 transitions, 152 flow. Second operand 3 states and 437 transitions. [2023-08-03 23:18:18,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 62 transitions, 280 flow [2023-08-03 23:18:18,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 62 transitions, 273 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:18:18,794 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 160 flow [2023-08-03 23:18:18,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2023-08-03 23:18:18,795 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 7 predicate places. [2023-08-03 23:18:18,795 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 160 flow [2023-08-03 23:18:18,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.0) internal successors, (396), 3 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:18,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:18,796 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:18:18,802 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 23:18:19,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:19,001 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:18:19,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash 465577747, now seen corresponding path program 1 times [2023-08-03 23:18:19,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:19,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845384123] [2023-08-03 23:18:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:19,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:18:19,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:19,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845384123] [2023-08-03 23:18:19,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845384123] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:18:19,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021877340] [2023-08-03 23:18:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:19,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:19,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:18:19,051 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:18:19,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:18:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:19,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:18:19,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:18:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:18:19,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:18:19,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:18:19,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021877340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:18:19,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:18:19,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:18:19,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253293265] [2023-08-03 23:18:19,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:18:19,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:18:19,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:19,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:18:19,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:18:19,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 246 [2023-08-03 23:18:19,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:19,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:19,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 246 [2023-08-03 23:18:19,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:32,455 INFO L124 PetriNetUnfolderBase]: 126173/165552 cut-off events. [2023-08-03 23:18:32,455 INFO L125 PetriNetUnfolderBase]: For 8780/8780 co-relation queries the response was YES. [2023-08-03 23:18:32,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335238 conditions, 165552 events. 126173/165552 cut-off events. For 8780/8780 co-relation queries the response was YES. Maximal size of possible extension queue 4907. Compared 1068978 event pairs, 74825 based on Foata normal form. 5/151389 useless extension candidates. Maximal degree in co-relation 82434. Up to 158221 conditions per place. [2023-08-03 23:18:33,375 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 48 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-08-03 23:18:33,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 62 transitions, 281 flow [2023-08-03 23:18:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:18:33,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:18:33,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 563 transitions. [2023-08-03 23:18:33,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5721544715447154 [2023-08-03 23:18:33,377 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 563 transitions. [2023-08-03 23:18:33,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 563 transitions. [2023-08-03 23:18:33,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:18:33,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 563 transitions. [2023-08-03 23:18:33,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.75) internal successors, (563), 4 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:33,380 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:33,381 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:33,381 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 160 flow. Second operand 4 states and 563 transitions. [2023-08-03 23:18:33,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 62 transitions, 281 flow [2023-08-03 23:18:33,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 62 transitions, 279 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:18:33,384 INFO L231 Difference]: Finished difference. Result has 70 places, 49 transitions, 155 flow [2023-08-03 23:18:33,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=70, PETRI_TRANSITIONS=49} [2023-08-03 23:18:33,385 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2023-08-03 23:18:33,385 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 49 transitions, 155 flow [2023-08-03 23:18:33,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:33,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:33,386 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:18:33,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 23:18:33,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:33,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:18:33,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:33,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2009144763, now seen corresponding path program 1 times [2023-08-03 23:18:33,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:33,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839926901] [2023-08-03 23:18:33,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:33,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:18:33,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:33,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839926901] [2023-08-03 23:18:33,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839926901] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:18:33,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848096585] [2023-08-03 23:18:33,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:33,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:33,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:18:33,684 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:18:33,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:18:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:33,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:18:33,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:18:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:18:33,795 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:18:33,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848096585] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:18:33,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:18:33,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:18:33,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042768029] [2023-08-03 23:18:33,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:18:33,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:18:33,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:33,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:18:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:18:33,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 246 [2023-08-03 23:18:33,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 49 transitions, 155 flow. Second operand has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:33,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:33,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 246 [2023-08-03 23:18:33,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:46,869 INFO L124 PetriNetUnfolderBase]: 124933/164418 cut-off events. [2023-08-03 23:18:46,869 INFO L125 PetriNetUnfolderBase]: For 7418/7418 co-relation queries the response was YES. [2023-08-03 23:18:47,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332620 conditions, 164418 events. 124933/164418 cut-off events. For 7418/7418 co-relation queries the response was YES. Maximal size of possible extension queue 4983. Compared 1076249 event pairs, 32068 based on Foata normal form. 400/151110 useless extension candidates. Maximal degree in co-relation 125393. Up to 154115 conditions per place. [2023-08-03 23:18:47,766 INFO L140 encePairwiseOnDemand]: 242/246 looper letters, 69 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-03 23:18:47,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 83 transitions, 369 flow [2023-08-03 23:18:47,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:18:47,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:18:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 713 transitions. [2023-08-03 23:18:47,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5796747967479675 [2023-08-03 23:18:47,768 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 713 transitions. [2023-08-03 23:18:47,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 713 transitions. [2023-08-03 23:18:47,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:18:47,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 713 transitions. [2023-08-03 23:18:47,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:47,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:47,772 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 246.0) internal successors, (1476), 6 states have internal predecessors, (1476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:47,772 INFO L175 Difference]: Start difference. First operand has 70 places, 49 transitions, 155 flow. Second operand 5 states and 713 transitions. [2023-08-03 23:18:47,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 83 transitions, 369 flow [2023-08-03 23:18:47,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 83 transitions, 362 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:18:47,777 INFO L231 Difference]: Finished difference. Result has 71 places, 49 transitions, 165 flow [2023-08-03 23:18:47,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=71, PETRI_TRANSITIONS=49} [2023-08-03 23:18:47,778 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 10 predicate places. [2023-08-03 23:18:47,778 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 49 transitions, 165 flow [2023-08-03 23:18:47,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.6) internal successors, (653), 5 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:47,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:18:47,778 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:18:47,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 23:18:47,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:47,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:18:47,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:18:47,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1296152135, now seen corresponding path program 1 times [2023-08-03 23:18:47,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:18:47,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539319141] [2023-08-03 23:18:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:47,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:18:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:48,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:18:48,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:18:48,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539319141] [2023-08-03 23:18:48,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539319141] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:18:48,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882860665] [2023-08-03 23:18:48,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:18:48,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:18:48,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:18:48,067 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:18:48,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:18:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:18:48,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:18:48,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:18:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:18:48,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:18:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:18:48,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882860665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:18:48,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:18:48,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:18:48,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304566329] [2023-08-03 23:18:48,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:18:48,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:18:48,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:18:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:18:48,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:18:48,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 246 [2023-08-03 23:18:48,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 49 transitions, 165 flow. Second operand has 5 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:18:48,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:18:48,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 246 [2023-08-03 23:18:48,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:18:59,198 INFO L124 PetriNetUnfolderBase]: 104198/136083 cut-off events. [2023-08-03 23:18:59,198 INFO L125 PetriNetUnfolderBase]: For 8760/8760 co-relation queries the response was YES. [2023-08-03 23:18:59,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276770 conditions, 136083 events. 104198/136083 cut-off events. For 8760/8760 co-relation queries the response was YES. Maximal size of possible extension queue 4438. Compared 854541 event pairs, 65348 based on Foata normal form. 100/125115 useless extension candidates. Maximal degree in co-relation 104519. Up to 127416 conditions per place. [2023-08-03 23:19:00,149 INFO L140 encePairwiseOnDemand]: 243/246 looper letters, 61 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-03 23:19:00,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 339 flow [2023-08-03 23:19:00,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:19:00,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:19:00,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 576 transitions. [2023-08-03 23:19:00,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2023-08-03 23:19:00,154 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 576 transitions. [2023-08-03 23:19:00,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 576 transitions. [2023-08-03 23:19:00,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:19:00,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 576 transitions. [2023-08-03 23:19:00,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:00,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:00,158 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:00,158 INFO L175 Difference]: Start difference. First operand has 71 places, 49 transitions, 165 flow. Second operand 4 states and 576 transitions. [2023-08-03 23:19:00,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 339 flow [2023-08-03 23:19:00,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 334 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:19:00,163 INFO L231 Difference]: Finished difference. Result has 72 places, 48 transitions, 158 flow [2023-08-03 23:19:00,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=48} [2023-08-03 23:19:00,165 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 11 predicate places. [2023-08-03 23:19:00,165 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 48 transitions, 158 flow [2023-08-03 23:19:00,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.4) internal successors, (657), 5 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:00,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:19:00,166 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:19:00,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 23:19:00,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:19:00,372 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:19:00,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:19:00,372 INFO L85 PathProgramCache]: Analyzing trace with hash -879326424, now seen corresponding path program 1 times [2023-08-03 23:19:00,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:19:00,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626888707] [2023-08-03 23:19:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:19:00,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:19:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:19:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:19:00,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:19:00,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626888707] [2023-08-03 23:19:00,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626888707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:19:00,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457905901] [2023-08-03 23:19:00,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:19:00,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:19:00,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:19:00,458 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:19:00,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:19:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:19:00,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:19:00,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:19:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:19:00,579 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:19:00,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457905901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:19:00,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:19:00,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:19:00,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213449154] [2023-08-03 23:19:00,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:19:00,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:19:00,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:19:00,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:19:00,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:19:00,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 246 [2023-08-03 23:19:00,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 48 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:00,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:19:00,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 246 [2023-08-03 23:19:00,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:19:06,659 INFO L124 PetriNetUnfolderBase]: 57198/78008 cut-off events. [2023-08-03 23:19:06,659 INFO L125 PetriNetUnfolderBase]: For 6455/6455 co-relation queries the response was YES. [2023-08-03 23:19:06,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160595 conditions, 78008 events. 57198/78008 cut-off events. For 6455/6455 co-relation queries the response was YES. Maximal size of possible extension queue 2627. Compared 504220 event pairs, 2958 based on Foata normal form. 10000/81740 useless extension candidates. Maximal degree in co-relation 60449. Up to 58800 conditions per place. [2023-08-03 23:19:07,090 INFO L140 encePairwiseOnDemand]: 244/246 looper letters, 0 selfloop transitions, 0 changer transitions 79/79 dead transitions. [2023-08-03 23:19:07,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 79 transitions, 358 flow [2023-08-03 23:19:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:19:07,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:19:07,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 585 transitions. [2023-08-03 23:19:07,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2023-08-03 23:19:07,102 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 585 transitions. [2023-08-03 23:19:07,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 585 transitions. [2023-08-03 23:19:07,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:19:07,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 585 transitions. [2023-08-03 23:19:07,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.25) internal successors, (585), 4 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:07,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:07,106 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 246.0) internal successors, (1230), 5 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:07,106 INFO L175 Difference]: Start difference. First operand has 72 places, 48 transitions, 158 flow. Second operand 4 states and 585 transitions. [2023-08-03 23:19:07,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 79 transitions, 358 flow [2023-08-03 23:19:07,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 79 transitions, 351 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:19:07,794 INFO L231 Difference]: Finished difference. Result has 70 places, 0 transitions, 0 flow [2023-08-03 23:19:07,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=246, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=70, PETRI_TRANSITIONS=0} [2023-08-03 23:19:07,795 INFO L281 CegarLoopForPetriNet]: 61 programPoint places, 9 predicate places. [2023-08-03 23:19:07,795 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 0 transitions, 0 flow [2023-08-03 23:19:07,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:07,796 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:19:07,796 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:19:07,796 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:19:07,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-03 23:19:07,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:19:07,997 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:19:07,997 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:19:08,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 158 transitions, 352 flow [2023-08-03 23:19:08,075 INFO L124 PetriNetUnfolderBase]: 93/1397 cut-off events. [2023-08-03 23:19:08,075 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:19:08,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 1397 events. 93/1397 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9653 event pairs, 0 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 1011. Up to 54 conditions per place. [2023-08-03 23:19:08,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 158 transitions, 352 flow [2023-08-03 23:19:08,081 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 158 transitions, 352 flow [2023-08-03 23:19:08,082 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:19:08,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 158 transitions, 352 flow [2023-08-03 23:19:08,082 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 158 transitions, 352 flow [2023-08-03 23:19:08,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 158 transitions, 352 flow [2023-08-03 23:19:08,182 INFO L124 PetriNetUnfolderBase]: 93/1397 cut-off events. [2023-08-03 23:19:08,183 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:19:08,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1495 conditions, 1397 events. 93/1397 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9653 event pairs, 0 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 1011. Up to 54 conditions per place. [2023-08-03 23:19:08,210 INFO L119 LiptonReduction]: Number of co-enabled transitions 6868 [2023-08-03 23:19:11,058 INFO L134 LiptonReduction]: Checked pairs total: 21460 [2023-08-03 23:19:11,058 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-03 23:19:11,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:19:11,060 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;@378fd80b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:19:11,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:19:11,062 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:19:11,062 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-03 23:19:11,062 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:19:11,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:19:11,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-03 23:19:11,062 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:19:11,063 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:19:11,063 INFO L85 PathProgramCache]: Analyzing trace with hash 28628471, now seen corresponding path program 1 times [2023-08-03 23:19:11,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:19:11,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819335879] [2023-08-03 23:19:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:19:11,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:19:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:19:11,156 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 23:19:11,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:19:11,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819335879] [2023-08-03 23:19:11,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819335879] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:19:11,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:19:11,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 23:19:11,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983669447] [2023-08-03 23:19:11,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:19:11,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:19:11,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:19:11,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:19:11,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:19:11,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 275 [2023-08-03 23:19:11,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 56 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:19:11,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:19:11,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 275 [2023-08-03 23:19:11,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:20:16,678 INFO L124 PetriNetUnfolderBase]: 633758/831367 cut-off events. [2023-08-03 23:20:16,679 INFO L125 PetriNetUnfolderBase]: For 9530/9530 co-relation queries the response was YES. [2023-08-03 23:20:18,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1634870 conditions, 831367 events. 633758/831367 cut-off events. For 9530/9530 co-relation queries the response was YES. Maximal size of possible extension queue 19839. Compared 6236739 event pairs, 105182 based on Foata normal form. 17577/758783 useless extension candidates. Maximal degree in co-relation 1376710. Up to 729279 conditions per place. [2023-08-03 23:20:20,760 INFO L140 encePairwiseOnDemand]: 269/275 looper letters, 75 selfloop transitions, 3 changer transitions 0/90 dead transitions. [2023-08-03 23:20:20,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 90 transitions, 393 flow [2023-08-03 23:20:20,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:20:20,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:20:20,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-03 23:20:20,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793939393939394 [2023-08-03 23:20:20,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-03 23:20:20,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-03 23:20:20,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:20:20,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-03 23:20:20,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 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 23:20:20,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 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 23:20:20,765 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 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 23:20:20,765 INFO L175 Difference]: Start difference. First operand has 68 places, 56 transitions, 148 flow. Second operand 3 states and 478 transitions. [2023-08-03 23:20:20,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 90 transitions, 393 flow [2023-08-03 23:20:20,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 90 transitions, 387 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:20:20,775 INFO L231 Difference]: Finished difference. Result has 71 places, 57 transitions, 161 flow [2023-08-03 23:20:20,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=71, PETRI_TRANSITIONS=57} [2023-08-03 23:20:20,776 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-03 23:20:20,776 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 57 transitions, 161 flow [2023-08-03 23:20:20,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 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 23:20:20,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:20:20,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:20:20,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 23:20:20,777 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:20:20,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:20:20,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1569750046, now seen corresponding path program 1 times [2023-08-03 23:20:20,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:20:20,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466318276] [2023-08-03 23:20:20,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:20:20,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:20:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:20:20,804 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 23:20:20,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:20:20,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466318276] [2023-08-03 23:20:20,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466318276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:20:20,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:20:20,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:20:20,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774465236] [2023-08-03 23:20:20,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:20:20,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:20:20,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:20:20,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:20:20,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:20:20,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 275 [2023-08-03 23:20:20,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 57 transitions, 161 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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 23:20:20,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:20:20,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 275 [2023-08-03 23:20:20,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:21:31,711 INFO L124 PetriNetUnfolderBase]: 618374/796029 cut-off events. [2023-08-03 23:21:31,712 INFO L125 PetriNetUnfolderBase]: For 61758/61758 co-relation queries the response was YES. [2023-08-03 23:21:33,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1685216 conditions, 796029 events. 618374/796029 cut-off events. For 61758/61758 co-relation queries the response was YES. Maximal size of possible extension queue 18876. Compared 5523924 event pairs, 518026 based on Foata normal form. 0/703592 useless extension candidates. Maximal degree in co-relation 1109501. Up to 771849 conditions per place. [2023-08-03 23:21:35,875 INFO L140 encePairwiseOnDemand]: 272/275 looper letters, 48 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-03 23:21:35,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 62 transitions, 274 flow [2023-08-03 23:21:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:21:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:21:35,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 436 transitions. [2023-08-03 23:21:35,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284848484848484 [2023-08-03 23:21:35,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 436 transitions. [2023-08-03 23:21:35,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 436 transitions. [2023-08-03 23:21:35,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:21:35,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 436 transitions. [2023-08-03 23:21:35,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:21:35,879 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 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 23:21:35,880 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 275.0) internal successors, (1100), 4 states have internal predecessors, (1100), 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 23:21:35,880 INFO L175 Difference]: Start difference. First operand has 71 places, 57 transitions, 161 flow. Second operand 3 states and 436 transitions. [2023-08-03 23:21:35,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 62 transitions, 274 flow [2023-08-03 23:21:35,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 62 transitions, 270 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:21:35,903 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 170 flow [2023-08-03 23:21:35,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=275, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2023-08-03 23:21:35,904 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-08-03 23:21:35,904 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 170 flow [2023-08-03 23:21:35,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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 23:21:35,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:21:35,904 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:21:35,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-03 23:21:35,904 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:21:35,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:21:35,905 INFO L85 PathProgramCache]: Analyzing trace with hash 825335273, now seen corresponding path program 1 times [2023-08-03 23:21:35,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:21:35,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450107186] [2023-08-03 23:21:35,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:21:35,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:21:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:21:35,918 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:21:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:21:35,937 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:21:35,938 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:21:35,938 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-03 23:21:35,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 23:21:35,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-03 23:21:35,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 23:21:35,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 23:21:35,938 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-03 23:21:35,939 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-03 23:21:35,942 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 23:21:35,942 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 23:21:35,998 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 11:21:35 BasicIcfg [2023-08-03 23:21:35,998 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 23:21:35,998 INFO L158 Benchmark]: Toolchain (without parser) took 259614.33ms. Allocated memory was 348.1MB in the beginning and 16.0GB in the end (delta: 15.7GB). Free memory was 295.9MB in the beginning and 9.4GB in the end (delta: -9.1GB). Peak memory consumption was 6.5GB. Max. memory is 16.0GB. [2023-08-03 23:21:35,999 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 348.1MB. Free memory was 301.6MB in the beginning and 301.5MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 23:21:35,999 INFO L158 Benchmark]: CACSL2BoogieTranslator took 480.19ms. Allocated memory is still 348.1MB. Free memory was 295.9MB in the beginning and 272.2MB in the end (delta: 23.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-03 23:21:35,999 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.69ms. Allocated memory is still 348.1MB. Free memory was 272.2MB in the beginning and 269.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 23:21:35,999 INFO L158 Benchmark]: Boogie Preprocessor took 32.53ms. Allocated memory is still 348.1MB. Free memory was 269.6MB in the beginning and 267.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 23:21:36,000 INFO L158 Benchmark]: RCFGBuilder took 652.99ms. Allocated memory was 348.1MB in the beginning and 526.4MB in the end (delta: 178.3MB). Free memory was 267.3MB in the beginning and 463.0MB in the end (delta: -195.7MB). Peak memory consumption was 15.7MB. Max. memory is 16.0GB. [2023-08-03 23:21:36,000 INFO L158 Benchmark]: TraceAbstraction took 258394.52ms. Allocated memory was 526.4MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 462.3MB in the beginning and 9.4GB in the end (delta: -8.9GB). Peak memory consumption was 6.5GB. Max. memory is 16.0GB. [2023-08-03 23:21:36,001 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 348.1MB. Free memory was 301.6MB in the beginning and 301.5MB in the end (delta: 44.6kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 480.19ms. Allocated memory is still 348.1MB. Free memory was 295.9MB in the beginning and 272.2MB in the end (delta: 23.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 48.69ms. Allocated memory is still 348.1MB. Free memory was 272.2MB in the beginning and 269.6MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.53ms. Allocated memory is still 348.1MB. Free memory was 269.6MB in the beginning and 267.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 652.99ms. Allocated memory was 348.1MB in the beginning and 526.4MB in the end (delta: 178.3MB). Free memory was 267.3MB in the beginning and 463.0MB in the end (delta: -195.7MB). Peak memory consumption was 15.7MB. Max. memory is 16.0GB. * TraceAbstraction took 258394.52ms. Allocated memory was 526.4MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 462.3MB in the beginning and 9.4GB in the end (delta: -8.9GB). Peak memory consumption was 6.5GB. 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: 3.2s, 108 PlacesBefore, 34 PlacesAfterwards, 103 TransitionsBefore, 27 TransitionsAfterwards, 1502 CoEnabledTransitionPairs, 7 FixpointIterations, 38 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 82 TotalNumberOfCompositions, 3874 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1857, independent: 1718, independent conditional: 0, independent unconditional: 1718, dependent: 139, dependent conditional: 0, dependent unconditional: 139, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 750, independent: 733, independent conditional: 0, independent unconditional: 733, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1857, independent: 985, independent conditional: 0, independent unconditional: 985, dependent: 122, dependent conditional: 0, dependent unconditional: 122, unknown: 750, unknown conditional: 0, unknown unconditional: 750] , Statistics on independence cache: Total cache size (in pairs): 83, Positive cache size: 75, Positive conditional cache size: 0, Positive unconditional cache size: 75, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.9s, 140 PlacesBefore, 61 PlacesAfterwards, 129 TransitionsBefore, 48 TransitionsAfterwards, 4200 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 88 TotalNumberOfCompositions, 14427 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5770, independent: 5487, independent conditional: 0, independent unconditional: 5487, dependent: 283, dependent conditional: 0, dependent unconditional: 283, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2003, independent: 1957, independent conditional: 0, independent unconditional: 1957, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 5770, independent: 3530, independent conditional: 0, independent unconditional: 3530, dependent: 237, dependent conditional: 0, dependent unconditional: 237, unknown: 2003, unknown conditional: 0, unknown unconditional: 2003] , Statistics on independence cache: Total cache size (in pairs): 398, Positive cache size: 377, Positive conditional cache size: 0, Positive unconditional cache size: 377, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.0s, 166 PlacesBefore, 68 PlacesAfterwards, 158 TransitionsBefore, 56 TransitionsAfterwards, 6868 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 60 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 4 ChoiceCompositions, 117 TotalNumberOfCompositions, 21460 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8078, independent: 7755, independent conditional: 0, independent unconditional: 7755, dependent: 323, dependent conditional: 0, dependent unconditional: 323, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3406, independent: 3341, independent conditional: 0, independent unconditional: 3341, dependent: 65, dependent conditional: 0, dependent unconditional: 65, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8078, independent: 4414, independent conditional: 0, independent unconditional: 4414, dependent: 258, dependent conditional: 0, dependent unconditional: 258, unknown: 3406, unknown conditional: 0, unknown unconditional: 3406] , Statistics on independence cache: Total cache size (in pairs): 421, Positive cache size: 392, Positive conditional cache size: 0, Positive unconditional cache size: 392, Negative cache size: 29, Negative conditional cache size: 0, Negative unconditional cache size: 29, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L709] 0 int __unbuffered_cnt = 0; [L711] 0 int __unbuffered_p0_EAX = 0; [L713] 0 int __unbuffered_p1_EAX = 0; [L715] 0 int __unbuffered_p2_EAX = 0; [L717] 0 int __unbuffered_p2_EBX = 0; [L718] 0 _Bool main$tmp_guard0; [L719] 0 _Bool main$tmp_guard1; [L721] 0 int x = 0; [L723] 0 int y = 0; [L725] 0 int z = 0; [L726] 0 _Bool z$flush_delayed; [L727] 0 int z$mem_tmp; [L728] 0 _Bool z$r_buff0_thd0; [L729] 0 _Bool z$r_buff0_thd1; [L730] 0 _Bool z$r_buff0_thd2; [L731] 0 _Bool z$r_buff0_thd3; [L732] 0 _Bool z$r_buff1_thd0; [L733] 0 _Bool z$r_buff1_thd1; [L734] 0 _Bool z$r_buff1_thd2; [L735] 0 _Bool z$r_buff1_thd3; [L736] 0 _Bool z$read_delayed; [L737] 0 int *z$read_delayed_var; [L738] 0 int z$w_buff0; [L739] 0 _Bool z$w_buff0_used; [L740] 0 int z$w_buff1; [L741] 0 _Bool z$w_buff1_used; [L742] 0 _Bool weak$$choice0; [L743] 0 _Bool weak$$choice2; [L840] 0 pthread_t t409[2]; [L841] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t409={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_buff0_thd3=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=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] [L841] COND TRUE 0 asdf<2 [L841] FCALL, FORK 0 pthread_create(&t409[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t409[asdf], ((void *)0), P0, ((void *)0))=-2, t409={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_buff0_thd3=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=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] [L747] 1 z$w_buff1 = z$w_buff0 [L748] 1 z$w_buff0 = 1 [L749] 1 z$w_buff1_used = z$w_buff0_used [L750] 1 z$w_buff0_used = (_Bool)1 [L751] CALL 1 __VERIFIER_assert(!(z$w_buff1_used && z$w_buff0_used)) [L18] COND FALSE 1 !(!expression) [L751] RET 1 __VERIFIER_assert(!(z$w_buff1_used && z$w_buff0_used)) [L752] 1 z$r_buff1_thd0 = z$r_buff0_thd0 [L753] 1 z$r_buff1_thd1 = z$r_buff0_thd1 [L754] 1 z$r_buff1_thd2 = z$r_buff0_thd2 [L755] 1 z$r_buff1_thd3 = z$r_buff0_thd3 [L756] 1 z$r_buff0_thd1 = (_Bool)1 VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, main$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_buff0_thd3=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=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] [L841] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t409={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_buff0_thd3=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=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] [L841] COND TRUE 0 asdf<2 [L841] FCALL, FORK 0 pthread_create(&t409[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t409[asdf], ((void *)0), P0, ((void *)0))=-1, t409={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_buff0_thd3=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=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] [L747] 2 z$w_buff1 = z$w_buff0 [L748] 2 z$w_buff0 = 1 [L749] 2 z$w_buff1_used = z$w_buff0_used [L750] 2 z$w_buff0_used = (_Bool)1 [L751] CALL 2 __VERIFIER_assert(!(z$w_buff1_used && z$w_buff0_used)) [L18] COND TRUE 2 !expression [L18] 2 reach_error() VAL [\old(expression)=1, __unbuffered_cnt=0, __unbuffered_p0_EAX=0, __unbuffered_p1_EAX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, expression=1, 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_buff0_thd3=0, z$r_buff1_thd0=0, z$r_buff1_thd1=0, z$r_buff1_thd2=0, z$r_buff1_thd3=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 7 procedures, 154 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: 4.1s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 50 IncrementalHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 50 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 180 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 106.2s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 100.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 382 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 331 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 747 IncrementalHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 3 mSDtfsCounter, 747 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=165occurred in iteration=5, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 251 ConstructedInterpolants, 0 QuantifiedInterpolants, 421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1143 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 138/158 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 10 procedures, 180 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 147.9s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 144.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 47 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 34 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 176 IncrementalHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 2 mSDtfsCounter, 176 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=170occurred in iteration=2, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 17 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 23:21:36,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...