/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_safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:16:48,951 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:16:49,012 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:16:49,017 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:16:49,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:16:49,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:16:49,018 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:16:49,040 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:16:49,040 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:16:49,043 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:16:49,043 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:16:49,043 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:16:49,044 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:16:49,045 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:16:49,045 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:16:49,046 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:16:49,046 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:16:49,046 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:16:49,046 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:16:49,046 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:16:49,046 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:16:49,047 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:16:49,047 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:16:49,047 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:16:49,048 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:16:49,048 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:16:49,049 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:16:49,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:16:49,049 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:16:49,049 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:16:49,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:16:49,050 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:16:49,050 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:16:49,050 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:16:49,050 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:16:49,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:16:49,051 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:16:49,051 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:16:49,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:16:49,051 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:16:49,051 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:16:49,051 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:16:49,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:16:49,260 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:16:49,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:16:49,263 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:16:49,263 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:16:49,264 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt_bound2.i [2023-08-04 00:16:50,357 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:16:50,591 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:16:50,592 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt_bound2.i [2023-08-04 00:16:50,610 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9025d72ea/a2f613d706b84c1ca4c136266f077b29/FLAGbbf3295b3 [2023-08-04 00:16:50,622 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9025d72ea/a2f613d706b84c1ca4c136266f077b29 [2023-08-04 00:16:50,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:16:50,628 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:16:50,630 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:16:50,630 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:16:50,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:16:50,633 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:16:50" (1/1) ... [2023-08-04 00:16:50,634 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4df23141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:50, skipping insertion in model container [2023-08-04 00:16:50,634 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:16:50" (1/1) ... [2023-08-04 00:16:50,678 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:16:50,777 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_safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt_bound2.i[986,999] [2023-08-04 00:16:50,910 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:16:50,919 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:16:50,929 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_safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt_bound2.i[986,999] [2023-08-04 00:16:50,946 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:16:50,948 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:16:51,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:16:51,030 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:16:51,030 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:16:51,035 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:16:51,035 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51 WrapperNode [2023-08-04 00:16:51,035 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:16:51,036 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:16:51,036 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:16:51,036 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:16:51,040 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51" (1/1) ... [2023-08-04 00:16:51,050 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51" (1/1) ... [2023-08-04 00:16:51,076 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 169 [2023-08-04 00:16:51,076 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:16:51,076 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:16:51,076 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:16:51,076 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:16:51,082 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51" (1/1) ... [2023-08-04 00:16:51,082 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51" (1/1) ... [2023-08-04 00:16:51,085 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51" (1/1) ... [2023-08-04 00:16:51,085 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51" (1/1) ... [2023-08-04 00:16:51,090 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51" (1/1) ... [2023-08-04 00:16:51,092 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51" (1/1) ... [2023-08-04 00:16:51,094 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51" (1/1) ... [2023-08-04 00:16:51,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51" (1/1) ... [2023-08-04 00:16:51,097 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:16:51,099 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:16:51,099 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:16:51,099 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:16:51,100 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51" (1/1) ... [2023-08-04 00:16:51,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:16:51,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:16:51,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 00:16:51,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 00:16:51,166 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:16:51,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:16:51,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:16:51,166 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:16:51,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:16:51,167 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:16:51,168 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:16:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:16:51,168 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:16:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:16:51,168 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:16:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:16:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:16:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:16:51,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:16:51,170 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 00:16:51,260 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:16:51,262 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:16:51,516 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:16:51,630 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:16:51,630 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:16:51,632 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:16:51 BoogieIcfgContainer [2023-08-04 00:16:51,632 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:16:51,635 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:16:51,635 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:16:51,637 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:16:51,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:16:50" (1/3) ... [2023-08-04 00:16:51,639 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433787b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:16:51, skipping insertion in model container [2023-08-04 00:16:51,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:16:51" (2/3) ... [2023-08-04 00:16:51,640 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433787b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:16:51, skipping insertion in model container [2023-08-04 00:16:51,640 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:16:51" (3/3) ... [2023-08-04 00:16:51,641 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe008_power.oepc_pso.oepc_pso.opt_rmo.oepc_rmo.opt_bound2.i [2023-08-04 00:16:51,648 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:16:51,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:16:51,655 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 00:16:51,655 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:16:51,701 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:16:51,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 129 transitions, 273 flow [2023-08-04 00:16:51,864 INFO L124 PetriNetUnfolderBase]: 30/448 cut-off events. [2023-08-04 00:16:51,865 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:16:51,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 448 events. 30/448 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1967 event pairs, 0 based on Foata normal form. 0/395 useless extension candidates. Maximal degree in co-relation 269. Up to 16 conditions per place. [2023-08-04 00:16:51,884 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 129 transitions, 273 flow [2023-08-04 00:16:51,888 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 100 transitions, 215 flow [2023-08-04 00:16:51,892 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:16:51,901 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 100 transitions, 215 flow [2023-08-04 00:16:51,903 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 100 transitions, 215 flow [2023-08-04 00:16:51,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 100 transitions, 215 flow [2023-08-04 00:16:51,930 INFO L124 PetriNetUnfolderBase]: 6/216 cut-off events. [2023-08-04 00:16:51,930 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:16:51,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 241 conditions, 216 events. 6/216 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 633 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 153. Up to 8 conditions per place. [2023-08-04 00:16:51,934 INFO L119 LiptonReduction]: Number of co-enabled transitions 1452 [2023-08-04 00:16:54,155 INFO L134 LiptonReduction]: Checked pairs total: 3688 [2023-08-04 00:16:54,155 INFO L136 LiptonReduction]: Total number of compositions: 79 [2023-08-04 00:16:54,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:16:54,178 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;@fb9f3b3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:16:54,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:16:54,183 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:16:54,183 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-04 00:16:54,184 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:16:54,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:54,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:16:54,185 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:16:54,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:54,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1459305967, now seen corresponding path program 1 times [2023-08-04 00:16:54,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:54,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907487072] [2023-08-04 00:16:54,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:54,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:54,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 00:16:54,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:54,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907487072] [2023-08-04 00:16:54,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907487072] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:16:54,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:16:54,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:16:54,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504965410] [2023-08-04 00:16:54,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:16:54,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:16:54,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:54,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:16:54,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:16:54,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 208 [2023-08-04 00:16:54,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:54,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:54,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 208 [2023-08-04 00:16:54,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:16:54,595 INFO L124 PetriNetUnfolderBase]: 484/912 cut-off events. [2023-08-04 00:16:54,595 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-04 00:16:54,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1845 conditions, 912 events. 484/912 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4757 event pairs, 240 based on Foata normal form. 0/790 useless extension candidates. Maximal degree in co-relation 1822. Up to 790 conditions per place. [2023-08-04 00:16:54,605 INFO L140 encePairwiseOnDemand]: 205/208 looper letters, 24 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-04 00:16:54,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 131 flow [2023-08-04 00:16:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:16:54,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:16:54,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-04 00:16:54,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5673076923076923 [2023-08-04 00:16:54,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-04 00:16:54,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-04 00:16:54,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:16:54,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-04 00:16:54,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:54,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:54,635 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:54,636 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 69 flow. Second operand 3 states and 354 transitions. [2023-08-04 00:16:54,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 131 flow [2023-08-04 00:16:54,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 131 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:16:54,640 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 77 flow [2023-08-04 00:16:54,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-04 00:16:54,644 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 00:16:54,644 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 77 flow [2023-08-04 00:16:54,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:54,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:54,645 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:16:54,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:16:54,645 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:16:54,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:54,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1463289868, now seen corresponding path program 1 times [2023-08-04 00:16:54,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:54,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014990516] [2023-08-04 00:16:54,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:54,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:16:54,661 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:16:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:16:54,684 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:16:54,684 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:16:54,685 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:16:54,686 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:16:54,687 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:16:54,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:16:54,687 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 00:16:54,688 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:16:54,689 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:16:54,689 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:16:54,706 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:16:54,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 344 flow [2023-08-04 00:16:54,832 INFO L124 PetriNetUnfolderBase]: 93/1377 cut-off events. [2023-08-04 00:16:54,832 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:16:54,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 1377 events. 93/1377 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9472 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1000. Up to 54 conditions per place. [2023-08-04 00:16:54,835 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 154 transitions, 344 flow [2023-08-04 00:16:54,836 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 125 transitions, 286 flow [2023-08-04 00:16:54,837 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:16:54,837 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 125 transitions, 286 flow [2023-08-04 00:16:54,837 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 125 transitions, 286 flow [2023-08-04 00:16:54,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 125 transitions, 286 flow [2023-08-04 00:16:54,877 INFO L124 PetriNetUnfolderBase]: 12/594 cut-off events. [2023-08-04 00:16:54,878 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:16:54,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 594 events. 12/594 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3059 event pairs, 0 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 478. Up to 27 conditions per place. [2023-08-04 00:16:54,884 INFO L119 LiptonReduction]: Number of co-enabled transitions 4008 [2023-08-04 00:16:57,449 INFO L134 LiptonReduction]: Checked pairs total: 14136 [2023-08-04 00:16:57,449 INFO L136 LiptonReduction]: Total number of compositions: 86 [2023-08-04 00:16:57,451 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:16:57,451 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;@fb9f3b3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:16:57,451 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:16:57,455 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:16:57,455 INFO L124 PetriNetUnfolderBase]: 0/60 cut-off events. [2023-08-04 00:16:57,456 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 00:16:57,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:16:57,456 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:16:57,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:16:57,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:16:57,456 INFO L85 PathProgramCache]: Analyzing trace with hash 289242295, now seen corresponding path program 1 times [2023-08-04 00:16:57,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:16:57,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152333565] [2023-08-04 00:16:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:16:57,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:16:57,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:16:57,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:16:57,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:16:57,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152333565] [2023-08-04 00:16:57,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152333565] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:16:57,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:16:57,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:16:57,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641734849] [2023-08-04 00:16:57,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:16:57,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:16:57,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:16:57,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:16:57,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:16:57,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 240 [2023-08-04 00:16:57,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:16:57,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:16:57,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 240 [2023-08-04 00:16:57,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:17:08,581 INFO L124 PetriNetUnfolderBase]: 100480/136794 cut-off events. [2023-08-04 00:17:08,581 INFO L125 PetriNetUnfolderBase]: For 8890/8890 co-relation queries the response was YES. [2023-08-04 00:17:08,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275651 conditions, 136794 events. 100480/136794 cut-off events. For 8890/8890 co-relation queries the response was YES. Maximal size of possible extension queue 3989. Compared 946502 event pairs, 78260 based on Foata normal form. 0/124736 useless extension candidates. Maximal degree in co-relation 64107. Up to 128256 conditions per place. [2023-08-04 00:17:09,337 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 38 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 00:17:09,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 220 flow [2023-08-04 00:17:09,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:17:09,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:17:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-08-04 00:17:09,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5819444444444445 [2023-08-04 00:17:09,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-08-04 00:17:09,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-08-04 00:17:09,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:17:09,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-08-04 00:17:09,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:09,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:09,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:09,342 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 128 flow. Second operand 3 states and 419 transitions. [2023-08-04 00:17:09,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 220 flow [2023-08-04 00:17:09,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 52 transitions, 214 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:17:09,350 INFO L231 Difference]: Finished difference. Result has 62 places, 47 transitions, 134 flow [2023-08-04 00:17:09,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=47} [2023-08-04 00:17:09,350 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 3 predicate places. [2023-08-04 00:17:09,351 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 47 transitions, 134 flow [2023-08-04 00:17:09,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:09,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:17:09,351 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:17:09,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-04 00:17:09,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:17:09,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:17:09,352 INFO L85 PathProgramCache]: Analyzing trace with hash 880509201, now seen corresponding path program 1 times [2023-08-04 00:17:09,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:17:09,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403894337] [2023-08-04 00:17:09,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:09,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:17:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:17:09,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:17:09,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403894337] [2023-08-04 00:17:09,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403894337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:17:09,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183873719] [2023-08-04 00:17:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:09,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:17:09,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:17:09,450 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:17:09,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 00:17:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:09,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:17:09,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:17:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:17:09,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:17:09,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183873719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:17:09,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:17:09,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:17:09,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104361998] [2023-08-04 00:17:09,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:17:09,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:17:09,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:17:09,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:17:09,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:17:09,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 240 [2023-08-04 00:17:09,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 47 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:09,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:17:09,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 240 [2023-08-04 00:17:09,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:17:20,169 INFO L124 PetriNetUnfolderBase]: 100440/136909 cut-off events. [2023-08-04 00:17:20,169 INFO L125 PetriNetUnfolderBase]: For 8075/8075 co-relation queries the response was YES. [2023-08-04 00:17:20,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275159 conditions, 136909 events. 100440/136909 cut-off events. For 8075/8075 co-relation queries the response was YES. Maximal size of possible extension queue 3993. Compared 948224 event pairs, 59760 based on Foata normal form. 25/124926 useless extension candidates. Maximal degree in co-relation 68342. Up to 128127 conditions per place. [2023-08-04 00:17:20,936 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 45 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-04 00:17:20,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 258 flow [2023-08-04 00:17:20,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:17:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:17:20,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 675 transitions. [2023-08-04 00:17:20,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-08-04 00:17:20,939 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 675 transitions. [2023-08-04 00:17:20,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 675 transitions. [2023-08-04 00:17:20,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:17:20,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 675 transitions. [2023-08-04 00:17:20,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:20,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:20,943 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:20,943 INFO L175 Difference]: Start difference. First operand has 62 places, 47 transitions, 134 flow. Second operand 5 states and 675 transitions. [2023-08-04 00:17:20,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 258 flow [2023-08-04 00:17:20,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 60 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:17:20,945 INFO L231 Difference]: Finished difference. Result has 65 places, 47 transitions, 148 flow [2023-08-04 00:17:20,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=65, PETRI_TRANSITIONS=47} [2023-08-04 00:17:20,945 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-04 00:17:20,946 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 47 transitions, 148 flow [2023-08-04 00:17:20,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.6) internal successors, (633), 5 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:20,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:17:20,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:17:20,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 00:17:21,150 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 [2023-08-04 00:17:21,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:17:21,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:17:21,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1952322950, now seen corresponding path program 1 times [2023-08-04 00:17:21,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:17:21,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940476392] [2023-08-04 00:17:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:21,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:17:21,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:17:21,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:17:21,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940476392] [2023-08-04 00:17:21,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940476392] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:17:21,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891596252] [2023-08-04 00:17:21,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:21,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:17:21,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:17:21,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:17:21,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 00:17:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:21,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:17:21,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:17:21,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:17:21,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:17:21,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891596252] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:17:21,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:17:21,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:17:21,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895373848] [2023-08-04 00:17:21,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:17:21,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:17:21,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:17:21,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:17:21,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:17:21,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 240 [2023-08-04 00:17:21,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 47 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:21,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:17:21,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 240 [2023-08-04 00:17:21,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:17:31,337 INFO L124 PetriNetUnfolderBase]: 97466/133911 cut-off events. [2023-08-04 00:17:31,338 INFO L125 PetriNetUnfolderBase]: For 7475/7475 co-relation queries the response was YES. [2023-08-04 00:17:31,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268470 conditions, 133911 events. 97466/133911 cut-off events. For 7475/7475 co-relation queries the response was YES. Maximal size of possible extension queue 4115. Compared 944842 event pairs, 77492 based on Foata normal form. 0/122984 useless extension candidates. Maximal degree in co-relation 86519. Up to 123550 conditions per place. [2023-08-04 00:17:32,331 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 46 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-04 00:17:32,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 60 transitions, 272 flow [2023-08-04 00:17:32,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:17:32,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:17:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-04 00:17:32,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2023-08-04 00:17:32,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-04 00:17:32,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-04 00:17:32,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:17:32,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-04 00:17:32,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:32,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:32,336 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 240.0) internal successors, (960), 4 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:32,336 INFO L175 Difference]: Start difference. First operand has 65 places, 47 transitions, 148 flow. Second operand 3 states and 426 transitions. [2023-08-04 00:17:32,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 60 transitions, 272 flow [2023-08-04 00:17:32,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 60 transitions, 265 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:17:32,340 INFO L231 Difference]: Finished difference. Result has 66 places, 48 transitions, 156 flow [2023-08-04 00:17:32,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=66, PETRI_TRANSITIONS=48} [2023-08-04 00:17:32,341 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 7 predicate places. [2023-08-04 00:17:32,341 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 48 transitions, 156 flow [2023-08-04 00:17:32,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:32,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:17:32,342 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:17:32,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 00:17:32,546 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 [2023-08-04 00:17:32,546 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:17:32,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:17:32,547 INFO L85 PathProgramCache]: Analyzing trace with hash -397250568, now seen corresponding path program 1 times [2023-08-04 00:17:32,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:17:32,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097595636] [2023-08-04 00:17:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:32,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:17:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:17:32,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:17:32,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097595636] [2023-08-04 00:17:32,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097595636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:17:32,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428330011] [2023-08-04 00:17:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:32,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:17:32,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:17:32,593 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:17:32,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 00:17:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:32,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:17:32,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:17:32,675 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:17:32,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:17:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 00:17:32,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428330011] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:17:32,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:17:32,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:17:32,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684952638] [2023-08-04 00:17:32,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:17:32,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:17:32,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:17:32,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:17:32,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:17:32,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 240 [2023-08-04 00:17:32,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 48 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:32,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:17:32,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 240 [2023-08-04 00:17:32,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:17:41,249 INFO L124 PetriNetUnfolderBase]: 84173/114502 cut-off events. [2023-08-04 00:17:41,250 INFO L125 PetriNetUnfolderBase]: For 7380/7380 co-relation queries the response was YES. [2023-08-04 00:17:41,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230688 conditions, 114502 events. 84173/114502 cut-off events. For 7380/7380 co-relation queries the response was YES. Maximal size of possible extension queue 3710. Compared 777621 event pairs, 48825 based on Foata normal form. 5/105187 useless extension candidates. Maximal degree in co-relation 56724. Up to 106221 conditions per place. [2023-08-04 00:17:41,947 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 46 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-04 00:17:41,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 60 transitions, 273 flow [2023-08-04 00:17:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:17:41,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:17:41,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 549 transitions. [2023-08-04 00:17:41,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571875 [2023-08-04 00:17:41,949 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 549 transitions. [2023-08-04 00:17:41,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 549 transitions. [2023-08-04 00:17:41,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:17:41,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 549 transitions. [2023-08-04 00:17:41,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 137.25) internal successors, (549), 4 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:41,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:41,952 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:41,952 INFO L175 Difference]: Start difference. First operand has 66 places, 48 transitions, 156 flow. Second operand 4 states and 549 transitions. [2023-08-04 00:17:41,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 60 transitions, 273 flow [2023-08-04 00:17:41,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 60 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:17:41,955 INFO L231 Difference]: Finished difference. Result has 68 places, 47 transitions, 151 flow [2023-08-04 00:17:41,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=68, PETRI_TRANSITIONS=47} [2023-08-04 00:17:41,955 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-04 00:17:41,955 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 47 transitions, 151 flow [2023-08-04 00:17:41,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:41,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:17:41,956 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:17:41,963 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 00:17:42,160 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 [2023-08-04 00:17:42,160 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:17:42,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:17:42,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1009649946, now seen corresponding path program 1 times [2023-08-04 00:17:42,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:17:42,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583432690] [2023-08-04 00:17:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:42,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:17:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:42,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:17:42,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:17:42,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583432690] [2023-08-04 00:17:42,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583432690] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:17:42,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506914083] [2023-08-04 00:17:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:42,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:17:42,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:17:42,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:17:42,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 00:17:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:42,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:17:42,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:17:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:17:42,292 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:17:42,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506914083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:17:42,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:17:42,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:17:42,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674443938] [2023-08-04 00:17:42,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:17:42,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:17:42,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:17:42,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:17:42,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:17:42,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 240 [2023-08-04 00:17:42,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 47 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:42,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:17:42,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 240 [2023-08-04 00:17:42,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:17:50,948 INFO L124 PetriNetUnfolderBase]: 82933/113418 cut-off events. [2023-08-04 00:17:50,949 INFO L125 PetriNetUnfolderBase]: For 5918/5918 co-relation queries the response was YES. [2023-08-04 00:17:51,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228120 conditions, 113418 events. 82933/113418 cut-off events. For 5918/5918 co-relation queries the response was YES. Maximal size of possible extension queue 3770. Compared 784139 event pairs, 19568 based on Foata normal form. 400/104633 useless extension candidates. Maximal degree in co-relation 85993. Up to 102115 conditions per place. [2023-08-04 00:17:51,517 INFO L140 encePairwiseOnDemand]: 236/240 looper letters, 67 selfloop transitions, 4 changer transitions 0/81 dead transitions. [2023-08-04 00:17:51,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 81 transitions, 361 flow [2023-08-04 00:17:51,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:17:51,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:17:51,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 696 transitions. [2023-08-04 00:17:51,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2023-08-04 00:17:51,519 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 696 transitions. [2023-08-04 00:17:51,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 696 transitions. [2023-08-04 00:17:51,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:17:51,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 696 transitions. [2023-08-04 00:17:51,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 139.2) internal successors, (696), 5 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:51,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:51,522 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 240.0) internal successors, (1440), 6 states have internal predecessors, (1440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:51,522 INFO L175 Difference]: Start difference. First operand has 68 places, 47 transitions, 151 flow. Second operand 5 states and 696 transitions. [2023-08-04 00:17:51,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 81 transitions, 361 flow [2023-08-04 00:17:51,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 81 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:17:51,527 INFO L231 Difference]: Finished difference. Result has 69 places, 47 transitions, 161 flow [2023-08-04 00:17:51,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=69, PETRI_TRANSITIONS=47} [2023-08-04 00:17:51,527 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 10 predicate places. [2023-08-04 00:17:51,527 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 47 transitions, 161 flow [2023-08-04 00:17:51,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 127.6) internal successors, (638), 5 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:51,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:17:51,528 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:17:51,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 00:17:51,745 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 [2023-08-04 00:17:51,745 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:17:51,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:17:51,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1504549934, now seen corresponding path program 1 times [2023-08-04 00:17:51,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:17:51,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741483274] [2023-08-04 00:17:51,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:51,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:17:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:17:51,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:17:51,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741483274] [2023-08-04 00:17:51,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741483274] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:17:51,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79736846] [2023-08-04 00:17:51,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:51,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:17:51,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:17:51,799 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:17:51,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 00:17:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:51,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:17:51,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:17:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:17:51,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:17:51,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:17:51,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79736846] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:17:51,902 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:17:51,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:17:51,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119185306] [2023-08-04 00:17:51,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:17:51,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:17:51,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:17:51,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:17:51,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:17:51,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 240 [2023-08-04 00:17:51,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 47 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:51,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:17:51,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 240 [2023-08-04 00:17:51,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:17:58,626 INFO L124 PetriNetUnfolderBase]: 69398/94083 cut-off events. [2023-08-04 00:17:58,627 INFO L125 PetriNetUnfolderBase]: For 7560/7560 co-relation queries the response was YES. [2023-08-04 00:17:59,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190770 conditions, 94083 events. 69398/94083 cut-off events. For 7560/7560 co-relation queries the response was YES. Maximal size of possible extension queue 3415. Compared 624006 event pairs, 42548 based on Foata normal form. 100/86738 useless extension candidates. Maximal degree in co-relation 72039. Up to 84616 conditions per place. [2023-08-04 00:17:59,300 INFO L140 encePairwiseOnDemand]: 237/240 looper letters, 59 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2023-08-04 00:17:59,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 72 transitions, 331 flow [2023-08-04 00:17:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:17:59,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:17:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 562 transitions. [2023-08-04 00:17:59,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5854166666666667 [2023-08-04 00:17:59,302 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 562 transitions. [2023-08-04 00:17:59,302 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 562 transitions. [2023-08-04 00:17:59,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:17:59,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 562 transitions. [2023-08-04 00:17:59,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 140.5) internal successors, (562), 4 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:59,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:59,304 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:59,304 INFO L175 Difference]: Start difference. First operand has 69 places, 47 transitions, 161 flow. Second operand 4 states and 562 transitions. [2023-08-04 00:17:59,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 72 transitions, 331 flow [2023-08-04 00:17:59,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 72 transitions, 326 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:17:59,308 INFO L231 Difference]: Finished difference. Result has 70 places, 46 transitions, 154 flow [2023-08-04 00:17:59,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=70, PETRI_TRANSITIONS=46} [2023-08-04 00:17:59,309 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 11 predicate places. [2023-08-04 00:17:59,309 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 46 transitions, 154 flow [2023-08-04 00:17:59,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 128.4) internal successors, (642), 5 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:59,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:17:59,309 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:17:59,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 00:17:59,528 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 [2023-08-04 00:17:59,528 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:17:59,528 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:17:59,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1142149631, now seen corresponding path program 1 times [2023-08-04 00:17:59,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:17:59,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135638415] [2023-08-04 00:17:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:59,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:17:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:59,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:17:59,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:17:59,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135638415] [2023-08-04 00:17:59,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135638415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:17:59,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80842952] [2023-08-04 00:17:59,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:17:59,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:17:59,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:17:59,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:17:59,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 00:17:59,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:17:59,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:17:59,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:17:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:17:59,679 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:17:59,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80842952] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:17:59,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:17:59,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:17:59,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473929237] [2023-08-04 00:17:59,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:17:59,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:17:59,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:17:59,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:17:59,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:17:59,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 240 [2023-08-04 00:17:59,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 46 transitions, 154 flow. Second operand has 4 states, 4 states have (on average 129.75) internal successors, (519), 4 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:17:59,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:17:59,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 240 [2023-08-04 00:17:59,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:18:03,431 INFO L124 PetriNetUnfolderBase]: 39958/55568 cut-off events. [2023-08-04 00:18:03,431 INFO L125 PetriNetUnfolderBase]: For 6055/6055 co-relation queries the response was YES. [2023-08-04 00:18:03,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115315 conditions, 55568 events. 39958/55568 cut-off events. For 6055/6055 co-relation queries the response was YES. Maximal size of possible extension queue 2028. Compared 360022 event pairs, 2958 based on Foata normal form. 6400/57083 useless extension candidates. Maximal degree in co-relation 45222. Up to 38800 conditions per place. [2023-08-04 00:18:03,568 INFO L140 encePairwiseOnDemand]: 238/240 looper letters, 0 selfloop transitions, 0 changer transitions 76/76 dead transitions. [2023-08-04 00:18:03,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 76 transitions, 346 flow [2023-08-04 00:18:03,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:18:03,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:18:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 570 transitions. [2023-08-04 00:18:03,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2023-08-04 00:18:03,570 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 570 transitions. [2023-08-04 00:18:03,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 570 transitions. [2023-08-04 00:18:03,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:18:03,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 570 transitions. [2023-08-04 00:18:03,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 142.5) internal successors, (570), 4 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:18:03,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:18:03,572 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 240.0) internal successors, (1200), 5 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:18:03,572 INFO L175 Difference]: Start difference. First operand has 70 places, 46 transitions, 154 flow. Second operand 4 states and 570 transitions. [2023-08-04 00:18:03,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 76 transitions, 346 flow [2023-08-04 00:18:04,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 339 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:18:04,134 INFO L231 Difference]: Finished difference. Result has 68 places, 0 transitions, 0 flow [2023-08-04 00:18:04,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=240, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=68, PETRI_TRANSITIONS=0} [2023-08-04 00:18:04,134 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 9 predicate places. [2023-08-04 00:18:04,134 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 0 transitions, 0 flow [2023-08-04 00:18:04,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.75) internal successors, (519), 4 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:18:04,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:18:04,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:18:04,135 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:18:04,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 00:18:04,339 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 [2023-08-04 00:18:04,340 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:18:04,340 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:18:04,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 344 flow [2023-08-04 00:18:04,420 INFO L124 PetriNetUnfolderBase]: 93/1377 cut-off events. [2023-08-04 00:18:04,420 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:18:04,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 1377 events. 93/1377 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9472 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1000. Up to 54 conditions per place. [2023-08-04 00:18:04,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 162 places, 154 transitions, 344 flow [2023-08-04 00:18:04,426 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 154 transitions, 344 flow [2023-08-04 00:18:04,426 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:18:04,426 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 154 transitions, 344 flow [2023-08-04 00:18:04,426 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 154 transitions, 344 flow [2023-08-04 00:18:04,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 154 transitions, 344 flow [2023-08-04 00:18:04,497 INFO L124 PetriNetUnfolderBase]: 93/1377 cut-off events. [2023-08-04 00:18:04,498 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:18:04,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1475 conditions, 1377 events. 93/1377 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9472 event pairs, 0 based on Foata normal form. 0/1216 useless extension candidates. Maximal degree in co-relation 1000. Up to 54 conditions per place. [2023-08-04 00:18:04,520 INFO L119 LiptonReduction]: Number of co-enabled transitions 6560 [2023-08-04 00:18:07,508 INFO L134 LiptonReduction]: Checked pairs total: 18265 [2023-08-04 00:18:07,508 INFO L136 LiptonReduction]: Total number of compositions: 117 [2023-08-04 00:18:07,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:18:07,510 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;@fb9f3b3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:18:07,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 00:18:07,511 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:18:07,511 INFO L124 PetriNetUnfolderBase]: 0/10 cut-off events. [2023-08-04 00:18:07,511 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:18:07,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:18:07,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-04 00:18:07,511 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:18:07,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:18:07,512 INFO L85 PathProgramCache]: Analyzing trace with hash 28097415, now seen corresponding path program 1 times [2023-08-04 00:18:07,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:18:07,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426970133] [2023-08-04 00:18:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:18:07,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:18:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:18:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:18:07,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:18:07,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426970133] [2023-08-04 00:18:07,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426970133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:18:07,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:18:07,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:18:07,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37293681] [2023-08-04 00:18:07,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:18:07,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:18:07,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:18:07,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:18:07,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:18:07,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 271 [2023-08-04 00:18:07,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:18:07,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:18:07,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 271 [2023-08-04 00:18:07,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:18:40,125 INFO L124 PetriNetUnfolderBase]: 322700/428281 cut-off events. [2023-08-04 00:18:40,126 INFO L125 PetriNetUnfolderBase]: For 7829/7829 co-relation queries the response was YES. [2023-08-04 00:18:41,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 844181 conditions, 428281 events. 322700/428281 cut-off events. For 7829/7829 co-relation queries the response was YES. Maximal size of possible extension queue 11125. Compared 3133505 event pairs, 54317 based on Foata normal form. 0/384302 useless extension candidates. Maximal degree in co-relation 711047. Up to 374859 conditions per place. [2023-08-04 00:18:42,205 INFO L140 encePairwiseOnDemand]: 266/271 looper letters, 67 selfloop transitions, 3 changer transitions 0/82 dead transitions. [2023-08-04 00:18:42,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 82 transitions, 361 flow [2023-08-04 00:18:42,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:18:42,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:18:42,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 459 transitions. [2023-08-04 00:18:42,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5645756457564576 [2023-08-04 00:18:42,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 459 transitions. [2023-08-04 00:18:42,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 459 transitions. [2023-08-04 00:18:42,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:18:42,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 459 transitions. [2023-08-04 00:18:42,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:18:42,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:18:42,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:18:42,209 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 138 flow. Second operand 3 states and 459 transitions. [2023-08-04 00:18:42,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 82 transitions, 361 flow [2023-08-04 00:18:42,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 82 transitions, 355 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:18:42,213 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 153 flow [2023-08-04 00:18:42,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=153, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2023-08-04 00:18:42,214 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 3 predicate places. [2023-08-04 00:18:42,214 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 153 flow [2023-08-04 00:18:42,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:18:42,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:18:42,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 00:18:42,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 00:18:42,215 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:18:42,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:18:42,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1245592786, now seen corresponding path program 1 times [2023-08-04 00:18:42,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:18:42,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40989280] [2023-08-04 00:18:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:18:42,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:18:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:18:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 00:18:42,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:18:42,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40989280] [2023-08-04 00:18:42,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40989280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:18:42,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:18:42,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:18:42,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502757638] [2023-08-04 00:18:42,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:18:42,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:18:42,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:18:42,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:18:42,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:18:42,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 271 [2023-08-04 00:18:42,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:18:42,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:18:42,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 271 [2023-08-04 00:18:42,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:19:15,039 INFO L124 PetriNetUnfolderBase]: 315038/415902 cut-off events. [2023-08-04 00:19:15,040 INFO L125 PetriNetUnfolderBase]: For 35174/35174 co-relation queries the response was YES. [2023-08-04 00:19:15,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 878147 conditions, 415902 events. 315038/415902 cut-off events. For 35174/35174 co-relation queries the response was YES. Maximal size of possible extension queue 10655. Compared 2933693 event pairs, 261814 based on Foata normal form. 0/371974 useless extension candidates. Maximal degree in co-relation 577622. Up to 396441 conditions per place. [2023-08-04 00:19:17,092 INFO L140 encePairwiseOnDemand]: 268/271 looper letters, 44 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2023-08-04 00:19:17,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 258 flow [2023-08-04 00:19:17,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:19:17,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:19:17,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 423 transitions. [2023-08-04 00:19:17,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5202952029520295 [2023-08-04 00:19:17,094 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 423 transitions. [2023-08-04 00:19:17,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 423 transitions. [2023-08-04 00:19:17,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:19:17,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 423 transitions. [2023-08-04 00:19:17,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:19:17,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:19:17,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:19:17,096 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 153 flow. Second operand 3 states and 423 transitions. [2023-08-04 00:19:17,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 258 flow [2023-08-04 00:19:17,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 58 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:19:17,115 INFO L231 Difference]: Finished difference. Result has 69 places, 54 transitions, 162 flow [2023-08-04 00:19:17,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=69, PETRI_TRANSITIONS=54} [2023-08-04 00:19:17,115 INFO L281 CegarLoopForPetriNet]: 64 programPoint places, 5 predicate places. [2023-08-04 00:19:17,115 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 54 transitions, 162 flow [2023-08-04 00:19:17,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.0) internal successors, (384), 3 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:19:17,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:19:17,116 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:19:17,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 00:19:17,116 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P0Err0ASSERT_VIOLATIONERROR_FUNCTION === [P0Err0ASSERT_VIOLATIONERROR_FUNCTION, P0Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 00:19:17,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:19:17,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1285328321, now seen corresponding path program 1 times [2023-08-04 00:19:17,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:19:17,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711762621] [2023-08-04 00:19:17,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:19:17,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:19:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:19:17,124 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:19:17,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:19:17,135 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:19:17,135 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:19:17,135 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-04 00:19:17,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-04 00:19:17,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-04 00:19:17,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P0Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-04 00:19:17,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 00:19:17,135 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 00:19:17,136 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 00:19:17,139 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 00:19:17,139 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 00:19:17,165 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 12:19:17 BasicIcfg [2023-08-04 00:19:17,165 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 00:19:17,166 INFO L158 Benchmark]: Toolchain (without parser) took 146537.41ms. Allocated memory was 373.3MB in the beginning and 16.0GB in the end (delta: 15.6GB). Free memory was 325.6MB in the beginning and 12.2GB in the end (delta: -11.8GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2023-08-04 00:19:17,166 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 373.3MB. Free memory is still 329.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 00:19:17,166 INFO L158 Benchmark]: CACSL2BoogieTranslator took 404.88ms. Allocated memory is still 373.3MB. Free memory was 325.3MB in the beginning and 301.9MB in the end (delta: 23.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-04 00:19:17,166 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.16ms. Allocated memory is still 373.3MB. Free memory was 301.9MB in the beginning and 299.2MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-04 00:19:17,166 INFO L158 Benchmark]: Boogie Preprocessor took 21.02ms. Allocated memory is still 373.3MB. Free memory was 298.9MB in the beginning and 297.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 00:19:17,167 INFO L158 Benchmark]: RCFGBuilder took 533.27ms. Allocated memory was 373.3MB in the beginning and 465.6MB in the end (delta: 92.3MB). Free memory was 297.1MB in the beginning and 416.7MB in the end (delta: -119.5MB). Peak memory consumption was 28.7MB. Max. memory is 16.0GB. [2023-08-04 00:19:17,167 INFO L158 Benchmark]: TraceAbstraction took 145530.91ms. Allocated memory was 465.6MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 415.6MB in the beginning and 12.2GB in the end (delta: -11.7GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2023-08-04 00:19:17,168 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 373.3MB. Free memory is still 329.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 404.88ms. Allocated memory is still 373.3MB. Free memory was 325.3MB in the beginning and 301.9MB in the end (delta: 23.4MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 40.16ms. Allocated memory is still 373.3MB. Free memory was 301.9MB in the beginning and 299.2MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 21.02ms. Allocated memory is still 373.3MB. Free memory was 298.9MB in the beginning and 297.1MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 533.27ms. Allocated memory was 373.3MB in the beginning and 465.6MB in the end (delta: 92.3MB). Free memory was 297.1MB in the beginning and 416.7MB in the end (delta: -119.5MB). Peak memory consumption was 28.7MB. Max. memory is 16.0GB. * TraceAbstraction took 145530.91ms. Allocated memory was 465.6MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 415.6MB in the beginning and 12.2GB in the end (delta: -11.7GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.3s, 105 PlacesBefore, 34 PlacesAfterwards, 100 TransitionsBefore, 27 TransitionsAfterwards, 1452 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 79 TotalNumberOfCompositions, 3688 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1828, independent: 1703, independent conditional: 0, independent unconditional: 1703, dependent: 125, dependent conditional: 0, dependent unconditional: 125, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 727, independent: 709, independent conditional: 0, independent unconditional: 709, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1828, independent: 994, independent conditional: 0, independent unconditional: 994, dependent: 107, dependent conditional: 0, dependent unconditional: 107, unknown: 727, unknown conditional: 0, unknown unconditional: 727] , 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: 2.6s, 136 PlacesBefore, 59 PlacesAfterwards, 125 TransitionsBefore, 46 TransitionsAfterwards, 4008 CoEnabledTransitionPairs, 7 FixpointIterations, 36 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 86 TotalNumberOfCompositions, 14136 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 4884, independent: 4598, independent conditional: 0, independent unconditional: 4598, dependent: 286, dependent conditional: 0, dependent unconditional: 286, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1820, independent: 1790, independent conditional: 0, independent unconditional: 1790, dependent: 30, dependent conditional: 0, dependent unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 4884, independent: 2808, independent conditional: 0, independent unconditional: 2808, dependent: 256, dependent conditional: 0, dependent unconditional: 256, unknown: 1820, unknown conditional: 0, unknown unconditional: 1820] , Statistics on independence cache: Total cache size (in pairs): 302, Positive cache size: 282, Positive conditional cache size: 0, Positive unconditional cache size: 282, Negative cache size: 20, Negative conditional cache size: 0, Negative unconditional cache size: 20, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 162 PlacesBefore, 64 PlacesAfterwards, 154 TransitionsBefore, 51 TransitionsAfterwards, 6560 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 60 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 16 ConcurrentYvCompositions, 5 ChoiceCompositions, 117 TotalNumberOfCompositions, 18265 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 7236, independent: 6957, independent conditional: 0, independent unconditional: 6957, dependent: 279, dependent conditional: 0, dependent unconditional: 279, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3226, independent: 3151, independent conditional: 0, independent unconditional: 3151, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 7236, independent: 3806, independent conditional: 0, independent unconditional: 3806, dependent: 204, dependent conditional: 0, dependent unconditional: 204, unknown: 3226, unknown conditional: 0, unknown unconditional: 3226] , Statistics on independence cache: Total cache size (in pairs): 379, Positive cache size: 346, Positive conditional cache size: 0, Positive unconditional cache size: 346, Negative cache size: 33, Negative conditional cache size: 0, Negative unconditional cache size: 33, 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_p1_EAX = 0; [L713] 0 int __unbuffered_p2_EAX = 0; [L714] 0 _Bool main$tmp_guard0; [L715] 0 _Bool main$tmp_guard1; [L717] 0 int x = 0; [L719] 0 int y = 0; [L721] 0 int z = 0; [L722] 0 _Bool z$flush_delayed; [L723] 0 int z$mem_tmp; [L724] 0 _Bool z$r_buff0_thd0; [L725] 0 _Bool z$r_buff0_thd1; [L726] 0 _Bool z$r_buff0_thd2; [L727] 0 _Bool z$r_buff0_thd3; [L728] 0 _Bool z$r_buff1_thd0; [L729] 0 _Bool z$r_buff1_thd1; [L730] 0 _Bool z$r_buff1_thd2; [L731] 0 _Bool z$r_buff1_thd3; [L732] 0 _Bool z$read_delayed; [L733] 0 int *z$read_delayed_var; [L734] 0 int z$w_buff0; [L735] 0 _Bool z$w_buff0_used; [L736] 0 int z$w_buff1; [L737] 0 _Bool z$w_buff1_used; [L738] 0 _Bool weak$$choice0; [L739] 0 _Bool weak$$choice2; [L820] 0 pthread_t t1961[2]; [L821] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p2_EAX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t1961={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] [L821] COND TRUE 0 asdf<2 [L821] FCALL, FORK 0 pthread_create(&t1961[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p2_EAX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1961[asdf], ((void *)0), P0, ((void *)0))=-2, t1961={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] [L743] 1 z$w_buff1 = z$w_buff0 [L744] 1 z$w_buff0 = 2 [L745] 1 z$w_buff1_used = z$w_buff0_used [L746] 1 z$w_buff0_used = (_Bool)1 [L747] CALL 1 __VERIFIER_assert(!(z$w_buff1_used && z$w_buff0_used)) [L18] COND FALSE 1 !(!expression) [L747] RET 1 __VERIFIER_assert(!(z$w_buff1_used && z$w_buff0_used)) [L748] 1 z$r_buff1_thd0 = z$r_buff0_thd0 [L749] 1 z$r_buff1_thd1 = z$r_buff0_thd1 [L750] 1 z$r_buff1_thd2 = z$r_buff0_thd2 [L751] 1 z$r_buff1_thd3 = z$r_buff0_thd3 [L752] 1 z$r_buff0_thd1 = (_Bool)1 VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p2_EAX=0, arg={0:0}, arg={0:0}, main$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$w_buff0=2, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L821] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p2_EAX=0, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t1961={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$w_buff0=2, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L821] COND TRUE 0 asdf<2 [L821] FCALL, FORK 0 pthread_create(&t1961[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p2_EAX=0, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t1961[asdf], ((void *)0), P0, ((void *)0))=-1, t1961={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$w_buff0=2, z$w_buff0_used=1, z$w_buff1=0, z$w_buff1_used=0, z=0] [L743] 2 z$w_buff1 = z$w_buff0 [L744] 2 z$w_buff0 = 2 [L745] 2 z$w_buff1_used = z$w_buff0_used [L746] 2 z$w_buff0_used = (_Bool)1 [L747] CALL 2 __VERIFIER_assert(!(z$w_buff1_used && z$w_buff0_used)) [L18] COND TRUE 2 !expression [L18] 2 reach_error() VAL [\old(expression)=0, __unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p2_EAX=0, expression=0, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x=0, y=0, z$flush_delayed=0, z$mem_tmp=0, z$r_buff0_thd0=0, z$r_buff0_thd1=1, z$r_buff0_thd2=0, z$r_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$w_buff0=2, z$w_buff0_used=1, z$w_buff1=2, z$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, 150 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.0s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 1 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 48 IncrementalHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 1 mSDtfsCounter, 48 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=1, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 7 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 10 procedures, 175 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 69.6s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 64.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 346 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 281 mSDsluCounter, 15 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 764 IncrementalHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 15 mSDtfsCounter, 764 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=161occurred in iteration=5, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 251 ConstructedInterpolants, 0 QuantifiedInterpolants, 421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1119 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 15 InterpolantComputations, 5 PerfectInterpolantSequences, 138/158 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 10 procedures, 175 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 72.8s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 69.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 45 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 164 IncrementalHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 8 mSDtfsCounter, 164 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=162occurred in iteration=2, InterpolantAutomatonStates: 6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 16 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-04 00:19:17,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...