/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_mix011_tso.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 23:12:39,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 23:12:39,713 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 23:12:39,718 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 23:12:39,718 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 23:12:39,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 23:12:39,719 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 23:12:39,755 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 23:12:39,756 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 23:12:39,759 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 23:12:39,760 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 23:12:39,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 23:12:39,761 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 23:12:39,762 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 23:12:39,762 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 23:12:39,763 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 23:12:39,763 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 23:12:39,763 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 23:12:39,763 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 23:12:39,764 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 23:12:39,764 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 23:12:39,764 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 23:12:39,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 23:12:39,765 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 23:12:39,766 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 23:12:39,766 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 23:12:39,766 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 23:12:39,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 23:12:39,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 23:12:39,767 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 23:12:39,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:12:39,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 23:12:39,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 23:12:39,769 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 23:12:39,769 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 23:12:39,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 23:12:39,769 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 23:12:39,769 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 23:12:39,769 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 23:12:39,770 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 23:12:39,770 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 23:12:39,770 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-03 23:12:40,032 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 23:12:40,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 23:12:40,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 23:12:40,057 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 23:12:40,057 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 23:12:40,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix011_tso.oepc_bound2.i [2023-08-03 23:12:41,240 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 23:12:41,475 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 23:12:41,475 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix011_tso.oepc_bound2.i [2023-08-03 23:12:41,499 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58c0d7aa1/e9642a2b653c4b9788a182098fc35a89/FLAG72c859ed7 [2023-08-03 23:12:41,512 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58c0d7aa1/e9642a2b653c4b9788a182098fc35a89 [2023-08-03 23:12:41,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 23:12:41,516 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 23:12:41,520 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 23:12:41,520 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 23:12:41,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 23:12:41,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:12:41" (1/1) ... [2023-08-03 23:12:41,525 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44469f3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:41, skipping insertion in model container [2023-08-03 23:12:41,525 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 11:12:41" (1/1) ... [2023-08-03 23:12:41,580 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 23:12:41,752 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_mix011_tso.oepc_bound2.i[949,962] [2023-08-03 23:12:41,966 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:12:41,979 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 23:12:41,990 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_mix011_tso.oepc_bound2.i[949,962] [2023-08-03 23:12:42,008 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:12:42,010 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-03 23:12:42,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 23:12:42,082 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:12:42,082 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-03 23:12:42,088 INFO L206 MainTranslator]: Completed translation [2023-08-03 23:12:42,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42 WrapperNode [2023-08-03 23:12:42,089 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 23:12:42,089 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 23:12:42,090 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 23:12:42,090 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 23:12:42,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42" (1/1) ... [2023-08-03 23:12:42,110 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42" (1/1) ... [2023-08-03 23:12:42,141 INFO L138 Inliner]: procedures = 176, calls = 60, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 178 [2023-08-03 23:12:42,141 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 23:12:42,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 23:12:42,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 23:12:42,142 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 23:12:42,149 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42" (1/1) ... [2023-08-03 23:12:42,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42" (1/1) ... [2023-08-03 23:12:42,152 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42" (1/1) ... [2023-08-03 23:12:42,153 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42" (1/1) ... [2023-08-03 23:12:42,161 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42" (1/1) ... [2023-08-03 23:12:42,164 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42" (1/1) ... [2023-08-03 23:12:42,166 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42" (1/1) ... [2023-08-03 23:12:42,170 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42" (1/1) ... [2023-08-03 23:12:42,173 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 23:12:42,174 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 23:12:42,175 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 23:12:42,175 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 23:12:42,176 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42" (1/1) ... [2023-08-03 23:12:42,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 23:12:42,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:12:42,212 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-03 23:12:42,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-03 23:12:42,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 23:12:42,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-03 23:12:42,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 23:12:42,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 23:12:42,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 23:12:42,247 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-03 23:12:42,248 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-03 23:12:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-03 23:12:42,248 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-03 23:12:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-03 23:12:42,248 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-03 23:12:42,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 23:12:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-03 23:12:42,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 23:12:42,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 23:12:42,251 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 23:12:42,363 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 23:12:42,364 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 23:12:42,681 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 23:12:42,794 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 23:12:42,794 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-03 23:12:42,796 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:12:42 BoogieIcfgContainer [2023-08-03 23:12:42,797 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 23:12:42,798 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 23:12:42,798 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 23:12:42,801 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 23:12:42,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 11:12:41" (1/3) ... [2023-08-03 23:12:42,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c8e287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:12:42, skipping insertion in model container [2023-08-03 23:12:42,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 11:12:42" (2/3) ... [2023-08-03 23:12:42,806 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79c8e287 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 11:12:42, skipping insertion in model container [2023-08-03 23:12:42,806 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 11:12:42" (3/3) ... [2023-08-03 23:12:42,807 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix011_tso.oepc_bound2.i [2023-08-03 23:12:42,814 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 23:12:42,820 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 23:12:42,821 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-03 23:12:42,821 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 23:12:42,865 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:12:42,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 135 transitions, 285 flow [2023-08-03 23:12:43,076 INFO L124 PetriNetUnfolderBase]: 30/460 cut-off events. [2023-08-03 23:12:43,076 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:12:43,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 460 events. 30/460 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2057 event pairs, 0 based on Foata normal form. 0/406 useless extension candidates. Maximal degree in co-relation 277. Up to 16 conditions per place. [2023-08-03 23:12:43,083 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 135 transitions, 285 flow [2023-08-03 23:12:43,087 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 106 transitions, 227 flow [2023-08-03 23:12:43,090 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:12:43,099 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 106 transitions, 227 flow [2023-08-03 23:12:43,107 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 106 transitions, 227 flow [2023-08-03 23:12:43,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 106 transitions, 227 flow [2023-08-03 23:12:43,140 INFO L124 PetriNetUnfolderBase]: 6/228 cut-off events. [2023-08-03 23:12:43,140 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:12:43,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 228 events. 6/228 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 693 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-08-03 23:12:43,144 INFO L119 LiptonReduction]: Number of co-enabled transitions 1632 [2023-08-03 23:12:46,222 INFO L134 LiptonReduction]: Checked pairs total: 3765 [2023-08-03 23:12:46,222 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-03 23:12:46,234 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:12:46,240 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;@6c27c6d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:12:46,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:12:46,244 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:12:46,244 INFO L124 PetriNetUnfolderBase]: 0/22 cut-off events. [2023-08-03 23:12:46,244 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:12:46,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:12:46,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-03 23:12:46,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:12:46,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:12:46,249 INFO L85 PathProgramCache]: Analyzing trace with hash -839934134, now seen corresponding path program 1 times [2023-08-03 23:12:46,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:12:46,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950178219] [2023-08-03 23:12:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:46,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:12:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 23:12:46,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:12:46,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950178219] [2023-08-03 23:12:46,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950178219] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:12:46,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:12:46,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:12:46,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160191147] [2023-08-03 23:12:46,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:12:46,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:12:46,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:12:46,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:12:46,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:12:46,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 220 [2023-08-03 23:12:46,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 69 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:46,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:12:46,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 220 [2023-08-03 23:12:46,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:12:46,773 INFO L124 PetriNetUnfolderBase]: 669/1118 cut-off events. [2023-08-03 23:12:46,774 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-03 23:12:46,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2306 conditions, 1118 events. 669/1118 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5182 event pairs, 568 based on Foata normal form. 0/1030 useless extension candidates. Maximal degree in co-relation 2289. Up to 1066 conditions per place. [2023-08-03 23:12:46,787 INFO L140 encePairwiseOnDemand]: 217/220 looper letters, 25 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2023-08-03 23:12:46,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 31 transitions, 131 flow [2023-08-03 23:12:46,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:12:46,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:12:46,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2023-08-03 23:12:46,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5651515151515152 [2023-08-03 23:12:46,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2023-08-03 23:12:46,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2023-08-03 23:12:46,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:12:46,811 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2023-08-03 23:12:46,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:46,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:46,824 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 220.0) internal successors, (880), 4 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:46,825 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 69 flow. Second operand 3 states and 373 transitions. [2023-08-03 23:12:46,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 31 transitions, 131 flow [2023-08-03 23:12:46,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 131 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 23:12:46,830 INFO L231 Difference]: Finished difference. Result has 37 places, 27 transitions, 77 flow [2023-08-03 23:12:46,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=220, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=37, PETRI_TRANSITIONS=27} [2023-08-03 23:12:46,835 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-03 23:12:46,836 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 27 transitions, 77 flow [2023-08-03 23:12:46,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:46,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:12:46,836 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 23:12:46,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 23:12:46,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:12:46,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:12:46,838 INFO L85 PathProgramCache]: Analyzing trace with hash -831072875, now seen corresponding path program 1 times [2023-08-03 23:12:46,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:12:46,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306266839] [2023-08-03 23:12:46,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:46,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:12:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:12:46,874 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:12:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:12:46,934 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:12:46,935 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:12:46,936 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:12:46,937 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:12:46,938 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:12:46,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 23:12:46,938 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 23:12:46,940 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-03 23:12:46,941 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 23:12:46,941 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 23:12:46,976 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-03 23:12:46,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:12:47,151 INFO L124 PetriNetUnfolderBase]: 93/1414 cut-off events. [2023-08-03 23:12:47,151 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:12:47,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 1414 events. 93/1414 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9883 event pairs, 0 based on Foata normal form. 0/1249 useless extension candidates. Maximal degree in co-relation 1028. Up to 54 conditions per place. [2023-08-03 23:12:47,159 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:12:47,162 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 134 transitions, 304 flow [2023-08-03 23:12:47,162 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:12:47,162 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 145 places, 134 transitions, 304 flow [2023-08-03 23:12:47,164 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 145 places, 134 transitions, 304 flow [2023-08-03 23:12:47,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 134 transitions, 304 flow [2023-08-03 23:12:47,227 INFO L124 PetriNetUnfolderBase]: 12/631 cut-off events. [2023-08-03 23:12:47,228 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:12:47,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 729 conditions, 631 events. 12/631 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3311 event pairs, 0 based on Foata normal form. 0/601 useless extension candidates. Maximal degree in co-relation 506. Up to 27 conditions per place. [2023-08-03 23:12:47,240 INFO L119 LiptonReduction]: Number of co-enabled transitions 4660 [2023-08-03 23:12:50,350 INFO L134 LiptonReduction]: Checked pairs total: 19625 [2023-08-03 23:12:50,350 INFO L136 LiptonReduction]: Total number of compositions: 89 [2023-08-03 23:12:50,352 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-03 23:12:50,353 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;@6c27c6d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:12:50,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 23:12:50,359 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:12:50,359 INFO L124 PetriNetUnfolderBase]: 0/64 cut-off events. [2023-08-03 23:12:50,360 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-03 23:12:50,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:12:50,360 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-03 23:12:50,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:12:50,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:12:50,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1993262264, now seen corresponding path program 1 times [2023-08-03 23:12:50,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:12:50,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922209257] [2023-08-03 23:12:50,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:12:50,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:12:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:12:50,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:12:50,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:12:50,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922209257] [2023-08-03 23:12:50,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922209257] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:12:50,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:12:50,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:12:50,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048155987] [2023-08-03 23:12:50,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:12:50,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:12:50,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:12:50,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:12:50,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:12:50,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 252 [2023-08-03 23:12:50,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:12:50,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:12:50,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 252 [2023-08-03 23:12:50,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:02,807 INFO L124 PetriNetUnfolderBase]: 99287/139739 cut-off events. [2023-08-03 23:13:02,807 INFO L125 PetriNetUnfolderBase]: For 8640/8640 co-relation queries the response was YES. [2023-08-03 23:13:03,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276638 conditions, 139739 events. 99287/139739 cut-off events. For 8640/8640 co-relation queries the response was YES. Maximal size of possible extension queue 4780. Compared 1068911 event pairs, 78800 based on Foata normal form. 0/125379 useless extension candidates. Maximal degree in co-relation 64902. Up to 126604 conditions per place. [2023-08-03 23:13:03,843 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 37 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2023-08-03 23:13:03,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 228 flow [2023-08-03 23:13:03,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:13:03,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:13:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 445 transitions. [2023-08-03 23:13:03,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5886243386243386 [2023-08-03 23:13:03,847 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 445 transitions. [2023-08-03 23:13:03,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 445 transitions. [2023-08-03 23:13:03,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:03,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 445 transitions. [2023-08-03 23:13:03,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:03,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:03,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:03,851 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 140 flow. Second operand 3 states and 445 transitions. [2023-08-03 23:13:03,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 228 flow [2023-08-03 23:13:03,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 57 transitions, 222 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 23:13:03,866 INFO L231 Difference]: Finished difference. Result has 68 places, 53 transitions, 146 flow [2023-08-03 23:13:03,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=68, PETRI_TRANSITIONS=53} [2023-08-03 23:13:03,867 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2023-08-03 23:13:03,867 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 53 transitions, 146 flow [2023-08-03 23:13:03,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:03,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:03,868 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 23:13:03,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 23:13:03,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:03,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:03,869 INFO L85 PathProgramCache]: Analyzing trace with hash 354734048, now seen corresponding path program 1 times [2023-08-03 23:13:03,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:03,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084723358] [2023-08-03 23:13:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:03,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:13:03,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:03,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084723358] [2023-08-03 23:13:03,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084723358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:03,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611453348] [2023-08-03 23:13:03,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:03,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:03,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:03,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:13:03,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 23:13:04,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:04,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:13:04,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:13:04,117 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:13:04,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611453348] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:13:04,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:13:04,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:13:04,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855958670] [2023-08-03 23:13:04,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:13:04,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:13:04,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:04,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:13:04,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:13:04,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 252 [2023-08-03 23:13:04,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 53 transitions, 146 flow. Second operand has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:04,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:04,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 252 [2023-08-03 23:13:04,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:15,942 INFO L124 PetriNetUnfolderBase]: 99263/139839 cut-off events. [2023-08-03 23:13:15,942 INFO L125 PetriNetUnfolderBase]: For 7984/7984 co-relation queries the response was YES. [2023-08-03 23:13:16,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276117 conditions, 139839 events. 99263/139839 cut-off events. For 7984/7984 co-relation queries the response was YES. Maximal size of possible extension queue 4782. Compared 1074936 event pairs, 62420 based on Foata normal form. 16/125515 useless extension candidates. Maximal degree in co-relation 72432. Up to 126521 conditions per place. [2023-08-03 23:13:16,744 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 42 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2023-08-03 23:13:16,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 258 flow [2023-08-03 23:13:16,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:13:16,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:13:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 717 transitions. [2023-08-03 23:13:16,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2023-08-03 23:13:16,749 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 717 transitions. [2023-08-03 23:13:16,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 717 transitions. [2023-08-03 23:13:16,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:16,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 717 transitions. [2023-08-03 23:13:16,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:16,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:16,756 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:16,756 INFO L175 Difference]: Start difference. First operand has 68 places, 53 transitions, 146 flow. Second operand 5 states and 717 transitions. [2023-08-03 23:13:16,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 258 flow [2023-08-03 23:13:16,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 63 transitions, 255 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-03 23:13:16,765 INFO L231 Difference]: Finished difference. Result has 71 places, 53 transitions, 160 flow [2023-08-03 23:13:16,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=160, PETRI_PLACES=71, PETRI_TRANSITIONS=53} [2023-08-03 23:13:16,766 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 6 predicate places. [2023-08-03 23:13:16,766 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 53 transitions, 160 flow [2023-08-03 23:13:16,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.6) internal successors, (678), 5 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:16,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:16,767 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:16,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 23:13:16,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:16,968 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:16,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:16,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1255212144, now seen corresponding path program 1 times [2023-08-03 23:13:16,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:16,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172103072] [2023-08-03 23:13:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:16,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-03 23:13:17,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:17,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172103072] [2023-08-03 23:13:17,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172103072] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:17,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833935353] [2023-08-03 23:13:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:17,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:17,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:17,034 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:13:17,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 23:13:17,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:17,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 23:13:17,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:13:17,147 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:13:17,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833935353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:13:17,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:13:17,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 23:13:17,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541954631] [2023-08-03 23:13:17,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:13:17,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:13:17,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:17,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:13:17,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:13:17,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 252 [2023-08-03 23:13:17,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 53 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:17,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:17,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 252 [2023-08-03 23:13:17,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:28,347 INFO L124 PetriNetUnfolderBase]: 97376/137157 cut-off events. [2023-08-03 23:13:28,347 INFO L125 PetriNetUnfolderBase]: For 7483/7483 co-relation queries the response was YES. [2023-08-03 23:13:28,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271491 conditions, 137157 events. 97376/137157 cut-off events. For 7483/7483 co-relation queries the response was YES. Maximal size of possible extension queue 4959. Compared 1059771 event pairs, 76147 based on Foata normal form. 0/123202 useless extension candidates. Maximal degree in co-relation 106453. Up to 123534 conditions per place. [2023-08-03 23:13:29,203 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 45 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2023-08-03 23:13:29,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 280 flow [2023-08-03 23:13:29,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:13:29,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:13:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 452 transitions. [2023-08-03 23:13:29,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2023-08-03 23:13:29,205 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 452 transitions. [2023-08-03 23:13:29,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 452 transitions. [2023-08-03 23:13:29,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:29,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 452 transitions. [2023-08-03 23:13:29,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:29,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:29,209 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:29,209 INFO L175 Difference]: Start difference. First operand has 71 places, 53 transitions, 160 flow. Second operand 3 states and 452 transitions. [2023-08-03 23:13:29,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 280 flow [2023-08-03 23:13:29,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 273 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 23:13:29,216 INFO L231 Difference]: Finished difference. Result has 72 places, 54 transitions, 168 flow [2023-08-03 23:13:29,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=72, PETRI_TRANSITIONS=54} [2023-08-03 23:13:29,218 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 7 predicate places. [2023-08-03 23:13:29,218 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 54 transitions, 168 flow [2023-08-03 23:13:29,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:29,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:29,219 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:29,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 23:13:29,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:29,423 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:29,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:29,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1753104060, now seen corresponding path program 1 times [2023-08-03 23:13:29,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:29,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598082087] [2023-08-03 23:13:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:29,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:29,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:29,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:13:29,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:29,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598082087] [2023-08-03 23:13:29,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598082087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:29,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318704323] [2023-08-03 23:13:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:29,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:29,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:29,500 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:13:29,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 23:13:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:29,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:13:29,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:13:29,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:13:29,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 23:13:29,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318704323] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:13:29,650 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:13:29,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 23:13:29,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530608546] [2023-08-03 23:13:29,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:13:29,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:13:29,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:29,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:13:29,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:13:29,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 252 [2023-08-03 23:13:29,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 54 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:29,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:29,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 252 [2023-08-03 23:13:29,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:38,615 INFO L124 PetriNetUnfolderBase]: 81082/112338 cut-off events. [2023-08-03 23:13:38,616 INFO L125 PetriNetUnfolderBase]: For 7064/7064 co-relation queries the response was YES. [2023-08-03 23:13:38,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224034 conditions, 112338 events. 81082/112338 cut-off events. For 7064/7064 co-relation queries the response was YES. Maximal size of possible extension queue 4231. Compared 822084 event pairs, 49312 based on Foata normal form. 4/101734 useless extension candidates. Maximal degree in co-relation 58635. Up to 102233 conditions per place. [2023-08-03 23:13:39,278 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 43 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2023-08-03 23:13:39,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 63 transitions, 273 flow [2023-08-03 23:13:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:13:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:13:39,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 582 transitions. [2023-08-03 23:13:39,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2023-08-03 23:13:39,280 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 582 transitions. [2023-08-03 23:13:39,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 582 transitions. [2023-08-03 23:13:39,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:39,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 582 transitions. [2023-08-03 23:13:39,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.5) internal successors, (582), 4 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:39,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:39,285 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:39,286 INFO L175 Difference]: Start difference. First operand has 72 places, 54 transitions, 168 flow. Second operand 4 states and 582 transitions. [2023-08-03 23:13:39,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 63 transitions, 273 flow [2023-08-03 23:13:39,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 63 transitions, 271 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:13:39,290 INFO L231 Difference]: Finished difference. Result has 74 places, 53 transitions, 163 flow [2023-08-03 23:13:39,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=74, PETRI_TRANSITIONS=53} [2023-08-03 23:13:39,291 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2023-08-03 23:13:39,291 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 53 transitions, 163 flow [2023-08-03 23:13:39,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:39,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:39,292 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:39,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-03 23:13:39,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:39,497 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:39,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:39,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1911627931, now seen corresponding path program 1 times [2023-08-03 23:13:39,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:39,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327845684] [2023-08-03 23:13:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:39,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:13:39,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:39,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327845684] [2023-08-03 23:13:39,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327845684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:39,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616329511] [2023-08-03 23:13:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:39,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:39,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:39,609 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:13:39,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 23:13:39,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:39,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:13:39,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:13:39,722 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:13:39,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616329511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:13:39,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:13:39,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 23:13:39,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809784824] [2023-08-03 23:13:39,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:13:39,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:13:39,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:39,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:13:39,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 23:13:39,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 252 [2023-08-03 23:13:39,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 53 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:39,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:39,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 252 [2023-08-03 23:13:39,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:48,506 INFO L124 PetriNetUnfolderBase]: 79842/112079 cut-off events. [2023-08-03 23:13:48,506 INFO L125 PetriNetUnfolderBase]: For 5567/5567 co-relation queries the response was YES. [2023-08-03 23:13:48,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222252 conditions, 112079 events. 79842/112079 cut-off events. For 5567/5567 co-relation queries the response was YES. Maximal size of possible extension queue 4331. Compared 846762 event pairs, 18762 based on Foata normal form. 400/103327 useless extension candidates. Maximal degree in co-relation 105881. Up to 98424 conditions per place. [2023-08-03 23:13:49,199 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 64 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2023-08-03 23:13:49,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 84 transitions, 361 flow [2023-08-03 23:13:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 23:13:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 23:13:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 738 transitions. [2023-08-03 23:13:49,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2023-08-03 23:13:49,201 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 738 transitions. [2023-08-03 23:13:49,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 738 transitions. [2023-08-03 23:13:49,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:49,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 738 transitions. [2023-08-03 23:13:49,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:49,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:49,206 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 252.0) internal successors, (1512), 6 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:49,206 INFO L175 Difference]: Start difference. First operand has 74 places, 53 transitions, 163 flow. Second operand 5 states and 738 transitions. [2023-08-03 23:13:49,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 84 transitions, 361 flow [2023-08-03 23:13:49,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 354 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:13:49,213 INFO L231 Difference]: Finished difference. Result has 75 places, 53 transitions, 173 flow [2023-08-03 23:13:49,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=75, PETRI_TRANSITIONS=53} [2023-08-03 23:13:49,215 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 10 predicate places. [2023-08-03 23:13:49,215 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 53 transitions, 173 flow [2023-08-03 23:13:49,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 136.6) internal successors, (683), 5 states have internal predecessors, (683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:49,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:49,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:49,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-03 23:13:49,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:49,421 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:49,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:49,421 INFO L85 PathProgramCache]: Analyzing trace with hash 699666518, now seen corresponding path program 1 times [2023-08-03 23:13:49,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:49,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13193216] [2023-08-03 23:13:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:49,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:13:49,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:49,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13193216] [2023-08-03 23:13:49,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13193216] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:49,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816373156] [2023-08-03 23:13:49,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:49,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:49,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:49,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:13:49,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 23:13:49,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:49,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:13:49,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:13:49,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:13:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-03 23:13:49,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816373156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:13:49,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:13:49,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 23:13:49,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157838887] [2023-08-03 23:13:49,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:13:49,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 23:13:49,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:49,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 23:13:49,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:13:49,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 252 [2023-08-03 23:13:49,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 53 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:49,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:49,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 252 [2023-08-03 23:13:49,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:13:57,378 INFO L124 PetriNetUnfolderBase]: 69178/95415 cut-off events. [2023-08-03 23:13:57,379 INFO L125 PetriNetUnfolderBase]: For 7985/7985 co-relation queries the response was YES. [2023-08-03 23:13:57,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191336 conditions, 95415 events. 69178/95415 cut-off events. For 7985/7985 co-relation queries the response was YES. Maximal size of possible extension queue 3897. Compared 686250 event pairs, 47402 based on Foata normal form. 80/87159 useless extension candidates. Maximal degree in co-relation 91245. Up to 84569 conditions per place. [2023-08-03 23:13:58,152 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 58 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2023-08-03 23:13:58,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 77 transitions, 339 flow [2023-08-03 23:13:58,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:13:58,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:13:58,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 597 transitions. [2023-08-03 23:13:58,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2023-08-03 23:13:58,155 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 597 transitions. [2023-08-03 23:13:58,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 597 transitions. [2023-08-03 23:13:58,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:13:58,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 597 transitions. [2023-08-03 23:13:58,157 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 149.25) internal successors, (597), 4 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:58,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:58,159 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:58,159 INFO L175 Difference]: Start difference. First operand has 75 places, 53 transitions, 173 flow. Second operand 4 states and 597 transitions. [2023-08-03 23:13:58,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 77 transitions, 339 flow [2023-08-03 23:13:58,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 77 transitions, 334 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-03 23:13:58,164 INFO L231 Difference]: Finished difference. Result has 76 places, 52 transitions, 166 flow [2023-08-03 23:13:58,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=76, PETRI_TRANSITIONS=52} [2023-08-03 23:13:58,165 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 11 predicate places. [2023-08-03 23:13:58,165 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 52 transitions, 166 flow [2023-08-03 23:13:58,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 137.4) internal successors, (687), 5 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:58,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:13:58,165 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:13:58,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 23:13:58,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:58,370 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-03 23:13:58,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:13:58,371 INFO L85 PathProgramCache]: Analyzing trace with hash 529696358, now seen corresponding path program 1 times [2023-08-03 23:13:58,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:13:58,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619277101] [2023-08-03 23:13:58,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:58,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:13:58,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:13:58,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:13:58,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619277101] [2023-08-03 23:13:58,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619277101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:13:58,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721928096] [2023-08-03 23:13:58,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:13:58,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:13:58,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:13:58,432 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:13:58,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 23:13:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:13:58,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 23:13:58,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:13:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-03 23:13:58,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 23:13:58,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721928096] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:13:58,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 23:13:58,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 23:13:58,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817547987] [2023-08-03 23:13:58,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:13:58,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:13:58,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:13:58,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:13:58,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 23:13:58,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 252 [2023-08-03 23:13:58,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 52 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:13:58,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:13:58,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 252 [2023-08-03 23:13:58,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:14:02,985 INFO L124 PetriNetUnfolderBase]: 39738/57479 cut-off events. [2023-08-03 23:14:02,985 INFO L125 PetriNetUnfolderBase]: For 5829/5829 co-relation queries the response was YES. [2023-08-03 23:14:03,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116680 conditions, 57479 events. 39738/57479 cut-off events. For 5829/5829 co-relation queries the response was YES. Maximal size of possible extension queue 2405. Compared 418699 event pairs, 2738 based on Foata normal form. 6400/59303 useless extension candidates. Maximal degree in co-relation 55517. Up to 38800 conditions per place. [2023-08-03 23:14:03,144 INFO L140 encePairwiseOnDemand]: 250/252 looper letters, 0 selfloop transitions, 0 changer transitions 82/82 dead transitions. [2023-08-03 23:14:03,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 82 transitions, 358 flow [2023-08-03 23:14:03,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:14:03,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:14:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 606 transitions. [2023-08-03 23:14:03,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2023-08-03 23:14:03,146 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 606 transitions. [2023-08-03 23:14:03,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 606 transitions. [2023-08-03 23:14:03,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:14:03,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 606 transitions. [2023-08-03 23:14:03,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 151.5) internal successors, (606), 4 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:14:03,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:14:03,150 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:14:03,150 INFO L175 Difference]: Start difference. First operand has 76 places, 52 transitions, 166 flow. Second operand 4 states and 606 transitions. [2023-08-03 23:14:03,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 82 transitions, 358 flow [2023-08-03 23:14:03,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 82 transitions, 351 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-03 23:14:03,634 INFO L231 Difference]: Finished difference. Result has 74 places, 0 transitions, 0 flow [2023-08-03 23:14:03,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=74, PETRI_TRANSITIONS=0} [2023-08-03 23:14:03,635 INFO L281 CegarLoopForPetriNet]: 65 programPoint places, 9 predicate places. [2023-08-03 23:14:03,636 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 0 transitions, 0 flow [2023-08-03 23:14:03,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.75) internal successors, (555), 4 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:14:03,636 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 23:14:03,636 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-03 23:14:03,636 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 23:14:03,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 23:14:03,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:14:03,841 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:14:03,842 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-03 23:14:03,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:14:03,931 INFO L124 PetriNetUnfolderBase]: 93/1414 cut-off events. [2023-08-03 23:14:03,931 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-03 23:14:03,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1512 conditions, 1414 events. 93/1414 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9883 event pairs, 0 based on Foata normal form. 0/1249 useless extension candidates. Maximal degree in co-relation 1028. Up to 54 conditions per place. [2023-08-03 23:14:03,934 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 163 transitions, 362 flow [2023-08-03 23:14:03,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 162 transitions, 356 flow [2023-08-03 23:14:03,937 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 23:14:03,937 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 170 places, 162 transitions, 356 flow [2023-08-03 23:14:03,938 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 170 places, 162 transitions, 356 flow [2023-08-03 23:14:03,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 162 transitions, 356 flow [2023-08-03 23:14:04,046 INFO L124 PetriNetUnfolderBase]: 93/1413 cut-off events. [2023-08-03 23:14:04,046 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-03 23:14:04,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1509 conditions, 1413 events. 93/1413 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 9867 event pairs, 0 based on Foata normal form. 0/1248 useless extension candidates. Maximal degree in co-relation 1025. Up to 54 conditions per place. [2023-08-03 23:14:04,074 INFO L119 LiptonReduction]: Number of co-enabled transitions 7532 [2023-08-03 23:14:07,469 INFO L134 LiptonReduction]: Checked pairs total: 28198 [2023-08-03 23:14:07,469 INFO L136 LiptonReduction]: Total number of compositions: 118 [2023-08-03 23:14:07,471 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 23:14:07,472 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;@6c27c6d3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 23:14:07,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-03 23:14:07,474 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 23:14:07,474 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2023-08-03 23:14:07,474 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 23:14:07,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:14:07,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 23:14:07,474 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:14:07,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:14:07,474 INFO L85 PathProgramCache]: Analyzing trace with hash 906795465, now seen corresponding path program 1 times [2023-08-03 23:14:07,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:14:07,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975004846] [2023-08-03 23:14:07,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:14:07,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:14:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:14:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:14:07,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:14:07,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975004846] [2023-08-03 23:14:07,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975004846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:14:07,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:14:07,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 23:14:07,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821487539] [2023-08-03 23:14:07,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:14:07,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:14:07,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:14:07,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:14:07,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:14:07,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 281 [2023-08-03 23:14:07,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 59 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:14:07,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:14:07,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 281 [2023-08-03 23:14:07,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:15:03,062 INFO L124 PetriNetUnfolderBase]: 468866/629670 cut-off events. [2023-08-03 23:15:03,063 INFO L125 PetriNetUnfolderBase]: For 9252/9252 co-relation queries the response was YES. [2023-08-03 23:15:04,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1228720 conditions, 629670 events. 468866/629670 cut-off events. For 9252/9252 co-relation queries the response was YES. Maximal size of possible extension queue 19718. Compared 4963325 event pairs, 380024 based on Foata normal form. 13020/547542 useless extension candidates. Maximal degree in co-relation 264675. Up to 587323 conditions per place. [2023-08-03 23:15:06,657 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 44 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2023-08-03 23:15:06,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 63 transitions, 250 flow [2023-08-03 23:15:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:15:06,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:15:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-08-03 23:15:06,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373665480427047 [2023-08-03 23:15:06,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-08-03 23:15:06,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-08-03 23:15:06,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:15:06,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-08-03 23:15:06,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:15:06,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:15:06,662 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:15:06,662 INFO L175 Difference]: Start difference. First operand has 71 places, 59 transitions, 150 flow. Second operand 3 states and 453 transitions. [2023-08-03 23:15:06,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 63 transitions, 250 flow [2023-08-03 23:15:06,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 63 transitions, 246 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-08-03 23:15:06,672 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 156 flow [2023-08-03 23:15:06,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2023-08-03 23:15:06,672 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2023-08-03 23:15:06,673 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 156 flow [2023-08-03 23:15:06,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:15:06,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:15:06,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:15:06,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-03 23:15:06,673 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:15:06,674 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:15:06,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1286316589, now seen corresponding path program 1 times [2023-08-03 23:15:06,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:15:06,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879997937] [2023-08-03 23:15:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:15:06,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:15:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:15:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:15:06,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:15:06,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879997937] [2023-08-03 23:15:06,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879997937] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 23:15:06,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632338239] [2023-08-03 23:15:06,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:15:06,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:15:06,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 23:15:06,725 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 23:15:06,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 23:15:06,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:15:06,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 23:15:06,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 23:15:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:15:06,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 23:15:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 23:15:06,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632338239] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 23:15:06,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 23:15:06,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-03 23:15:06,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391310571] [2023-08-03 23:15:06,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 23:15:06,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 23:15:06,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:15:06,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 23:15:06,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-03 23:15:06,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 281 [2023-08-03 23:15:06,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 156 flow. Second operand has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:15:06,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:15:06,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 281 [2023-08-03 23:15:06,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:15:55,602 INFO L124 PetriNetUnfolderBase]: 389314/518238 cut-off events. [2023-08-03 23:15:55,602 INFO L125 PetriNetUnfolderBase]: For 6296/6296 co-relation queries the response was YES. [2023-08-03 23:15:56,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010687 conditions, 518238 events. 389314/518238 cut-off events. For 6296/6296 co-relation queries the response was YES. Maximal size of possible extension queue 16572. Compared 3923432 event pairs, 247180 based on Foata normal form. 4/442210 useless extension candidates. Maximal degree in co-relation 264509. Up to 484009 conditions per place. [2023-08-03 23:15:58,741 INFO L140 encePairwiseOnDemand]: 277/281 looper letters, 49 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-03 23:15:58,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 70 transitions, 284 flow [2023-08-03 23:15:58,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 23:15:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 23:15:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 590 transitions. [2023-08-03 23:15:58,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5249110320284698 [2023-08-03 23:15:58,743 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 590 transitions. [2023-08-03 23:15:58,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 590 transitions. [2023-08-03 23:15:58,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:15:58,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 590 transitions. [2023-08-03 23:15:58,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:15:58,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:15:58,747 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 281.0) internal successors, (1405), 5 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:15:58,747 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 156 flow. Second operand 4 states and 590 transitions. [2023-08-03 23:15:58,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 70 transitions, 284 flow [2023-08-03 23:15:58,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 70 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:15:58,749 INFO L231 Difference]: Finished difference. Result has 78 places, 59 transitions, 168 flow [2023-08-03 23:15:58,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=78, PETRI_TRANSITIONS=59} [2023-08-03 23:15:58,750 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2023-08-03 23:15:58,750 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 59 transitions, 168 flow [2023-08-03 23:15:58,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:15:58,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:15:58,750 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:15:58,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-03 23:15:58,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 23:15:58,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:15:58,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:15:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash 881674270, now seen corresponding path program 1 times [2023-08-03 23:15:58,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:15:58,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868172663] [2023-08-03 23:15:58,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:15:58,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:15:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:15:59,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:15:59,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:15:59,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868172663] [2023-08-03 23:15:59,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868172663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:15:59,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:15:59,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 23:15:59,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864219004] [2023-08-03 23:15:59,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:15:59,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:15:59,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:15:59,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:15:59,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:15:59,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 281 [2023-08-03 23:15:59,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 59 transitions, 168 flow. Second operand has 3 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) [2023-08-03 23:15:59,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:15:59,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 281 [2023-08-03 23:15:59,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:16:35,914 INFO L124 PetriNetUnfolderBase]: 335018/466967 cut-off events. [2023-08-03 23:16:35,915 INFO L125 PetriNetUnfolderBase]: For 5808/5808 co-relation queries the response was YES. [2023-08-03 23:16:37,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891080 conditions, 466967 events. 335018/466967 cut-off events. For 5808/5808 co-relation queries the response was YES. Maximal size of possible extension queue 14276. Compared 3864526 event pairs, 55274 based on Foata normal form. 0/405607 useless extension candidates. Maximal degree in co-relation 424861. Up to 383649 conditions per place. [2023-08-03 23:16:38,545 INFO L140 encePairwiseOnDemand]: 276/281 looper letters, 67 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2023-08-03 23:16:38,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 87 transitions, 377 flow [2023-08-03 23:16:38,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:16:38,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:16:38,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-03 23:16:38,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575326215895611 [2023-08-03 23:16:38,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-03 23:16:38,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-03 23:16:38,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:16:38,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-03 23:16:38,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:16:38,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:16:38,549 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:16:38,549 INFO L175 Difference]: Start difference. First operand has 78 places, 59 transitions, 168 flow. Second operand 3 states and 485 transitions. [2023-08-03 23:16:38,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 87 transitions, 377 flow [2023-08-03 23:16:38,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 87 transitions, 370 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-03 23:16:38,551 INFO L231 Difference]: Finished difference. Result has 78 places, 61 transitions, 182 flow [2023-08-03 23:16:38,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=78, PETRI_TRANSITIONS=61} [2023-08-03 23:16:38,552 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2023-08-03 23:16:38,552 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 61 transitions, 182 flow [2023-08-03 23:16:38,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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) [2023-08-03 23:16:38,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:16:38,553 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:16:38,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-03 23:16:38,553 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:16:38,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:16:38,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1190957674, now seen corresponding path program 1 times [2023-08-03 23:16:38,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:16:38,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417207039] [2023-08-03 23:16:38,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:16:38,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:16:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 23:16:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 23:16:38,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 23:16:38,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417207039] [2023-08-03 23:16:38,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417207039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 23:16:38,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 23:16:38,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-03 23:16:38,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692387736] [2023-08-03 23:16:38,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 23:16:38,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 23:16:38,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 23:16:38,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 23:16:38,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 23:16:38,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 281 [2023-08-03 23:16:38,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 61 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:16:38,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 23:16:38,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 281 [2023-08-03 23:16:38,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 23:17:18,855 INFO L124 PetriNetUnfolderBase]: 326858/437623 cut-off events. [2023-08-03 23:17:18,856 INFO L125 PetriNetUnfolderBase]: For 32441/32441 co-relation queries the response was YES. [2023-08-03 23:17:20,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906232 conditions, 437623 events. 326858/437623 cut-off events. For 32441/32441 co-relation queries the response was YES. Maximal size of possible extension queue 15234. Compared 3365667 event pairs, 274810 based on Foata normal form. 0/385803 useless extension candidates. Maximal degree in co-relation 433189. Up to 406153 conditions per place. [2023-08-03 23:17:21,451 INFO L140 encePairwiseOnDemand]: 278/281 looper letters, 53 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-03 23:17:21,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 72 transitions, 317 flow [2023-08-03 23:17:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 23:17:21,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 23:17:21,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-08-03 23:17:21,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432977461447213 [2023-08-03 23:17:21,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-08-03 23:17:21,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-08-03 23:17:21,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 23:17:21,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-08-03 23:17:21,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:21,455 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:21,456 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 281.0) internal successors, (1124), 4 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:21,456 INFO L175 Difference]: Start difference. First operand has 78 places, 61 transitions, 182 flow. Second operand 3 states and 458 transitions. [2023-08-03 23:17:21,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 72 transitions, 317 flow [2023-08-03 23:17:21,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 72 transitions, 313 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 23:17:21,465 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 191 flow [2023-08-03 23:17:21,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=281, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=191, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2023-08-03 23:17:21,465 INFO L281 CegarLoopForPetriNet]: 71 programPoint places, 9 predicate places. [2023-08-03 23:17:21,465 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 191 flow [2023-08-03 23:17:21,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 23:17:21,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 23:17:21,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 23:17:21,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 23:17:21,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting P1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION, P1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-03 23:17:21,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 23:17:21,466 INFO L85 PathProgramCache]: Analyzing trace with hash -107898109, now seen corresponding path program 1 times [2023-08-03 23:17:21,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 23:17:21,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67004435] [2023-08-03 23:17:21,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 23:17:21,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 23:17:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:17:21,480 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 23:17:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 23:17:21,499 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 23:17:21,500 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 23:17:21,500 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-03 23:17:21,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-08-03 23:17:21,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-08-03 23:17:21,500 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location P1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-08-03 23:17:21,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 23:17:21,500 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-03 23:17:21,501 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-03 23:17:21,503 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-03 23:17:21,503 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-03 23:17:21,748 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.08 11:17:21 BasicIcfg [2023-08-03 23:17:21,757 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-03 23:17:21,758 INFO L158 Benchmark]: Toolchain (without parser) took 280242.13ms. Allocated memory was 329.3MB in the beginning and 16.0GB in the end (delta: 15.7GB). Free memory was 279.6MB in the beginning and 12.3GB in the end (delta: -12.0GB). Peak memory consumption was 4.4GB. Max. memory is 16.0GB. [2023-08-03 23:17:21,758 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 329.3MB. Free memory is still 277.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-03 23:17:21,758 INFO L158 Benchmark]: CACSL2BoogieTranslator took 569.15ms. Allocated memory is still 329.3MB. Free memory was 279.3MB in the beginning and 255.5MB in the end (delta: 23.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-03 23:17:21,758 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.70ms. Allocated memory is still 329.3MB. Free memory was 255.5MB in the beginning and 252.7MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-03 23:17:21,759 INFO L158 Benchmark]: Boogie Preprocessor took 32.00ms. Allocated memory is still 329.3MB. Free memory was 252.7MB in the beginning and 250.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-03 23:17:21,759 INFO L158 Benchmark]: RCFGBuilder took 622.28ms. Allocated memory was 329.3MB in the beginning and 474.0MB in the end (delta: 144.7MB). Free memory was 250.6MB in the beginning and 416.5MB in the end (delta: -166.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-03 23:17:21,759 INFO L158 Benchmark]: TraceAbstraction took 278958.70ms. Allocated memory was 474.0MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 415.5MB in the beginning and 12.3GB in the end (delta: -11.9GB). Peak memory consumption was 4.4GB. Max. memory is 16.0GB. [2023-08-03 23:17:21,761 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 329.3MB. Free memory is still 277.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 569.15ms. Allocated memory is still 329.3MB. Free memory was 279.3MB in the beginning and 255.5MB in the end (delta: 23.8MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 51.70ms. Allocated memory is still 329.3MB. Free memory was 255.5MB in the beginning and 252.7MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.00ms. Allocated memory is still 329.3MB. Free memory was 252.7MB in the beginning and 250.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 622.28ms. Allocated memory was 329.3MB in the beginning and 474.0MB in the end (delta: 144.7MB). Free memory was 250.6MB in the beginning and 416.5MB in the end (delta: -166.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 278958.70ms. Allocated memory was 474.0MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 415.5MB in the beginning and 12.3GB in the end (delta: -11.9GB). Peak memory consumption was 4.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.1s, 111 PlacesBefore, 34 PlacesAfterwards, 106 TransitionsBefore, 27 TransitionsAfterwards, 1632 CoEnabledTransitionPairs, 6 FixpointIterations, 39 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 85 TotalNumberOfCompositions, 3765 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1945, independent: 1822, independent conditional: 0, independent unconditional: 1822, dependent: 123, dependent conditional: 0, dependent unconditional: 123, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 849, independent: 831, independent conditional: 0, independent unconditional: 831, dependent: 18, dependent conditional: 0, dependent unconditional: 18, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1945, independent: 991, independent conditional: 0, independent unconditional: 991, dependent: 105, dependent conditional: 0, dependent unconditional: 105, unknown: 849, unknown conditional: 0, unknown unconditional: 849] , Statistics on independence cache: Total cache size (in pairs): 96, Positive cache size: 87, Positive conditional cache size: 0, Positive unconditional cache size: 87, Negative cache size: 9, Negative conditional cache size: 0, Negative unconditional cache size: 9, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 145 PlacesBefore, 65 PlacesAfterwards, 134 TransitionsBefore, 52 TransitionsAfterwards, 4660 CoEnabledTransitionPairs, 7 FixpointIterations, 39 TrivialSequentialCompositions, 39 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 89 TotalNumberOfCompositions, 19625 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9001, independent: 8618, independent conditional: 0, independent unconditional: 8618, dependent: 383, dependent conditional: 0, dependent unconditional: 383, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2259, independent: 2217, independent conditional: 0, independent unconditional: 2217, dependent: 42, dependent conditional: 0, dependent unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9001, independent: 6401, independent conditional: 0, independent unconditional: 6401, dependent: 341, dependent conditional: 0, dependent unconditional: 341, unknown: 2259, unknown conditional: 0, unknown unconditional: 2259] , Statistics on independence cache: Total cache size (in pairs): 516, Positive cache size: 492, Positive conditional cache size: 0, Positive unconditional cache size: 492, Negative cache size: 24, Negative conditional cache size: 0, Negative unconditional cache size: 24, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.5s, 170 PlacesBefore, 71 PlacesAfterwards, 162 TransitionsBefore, 59 TransitionsAfterwards, 7532 CoEnabledTransitionPairs, 7 FixpointIterations, 39 TrivialSequentialCompositions, 60 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 15 ConcurrentYvCompositions, 4 ChoiceCompositions, 118 TotalNumberOfCompositions, 28198 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 10783, independent: 10354, independent conditional: 0, independent unconditional: 10354, dependent: 429, dependent conditional: 0, dependent unconditional: 429, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3755, independent: 3681, independent conditional: 0, independent unconditional: 3681, dependent: 74, dependent conditional: 0, dependent unconditional: 74, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 10783, independent: 6673, independent conditional: 0, independent unconditional: 6673, dependent: 355, dependent conditional: 0, dependent unconditional: 355, unknown: 3755, unknown conditional: 0, unknown unconditional: 3755] , Statistics on independence cache: Total cache size (in pairs): 560, Positive cache size: 522, Positive conditional cache size: 0, Positive unconditional cache size: 522, Negative cache size: 38, Negative conditional cache size: 0, Negative unconditional cache size: 38, 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_p1_EBX = 0; [L715] 0 int __unbuffered_p2_EAX = 0; [L717] 0 int __unbuffered_p2_EBX = 0; [L719] 0 int a = 0; [L720] 0 _Bool main$tmp_guard0; [L721] 0 _Bool main$tmp_guard1; [L723] 0 int x = 0; [L724] 0 _Bool x$flush_delayed; [L725] 0 int x$mem_tmp; [L726] 0 _Bool x$r_buff0_thd0; [L727] 0 _Bool x$r_buff0_thd1; [L728] 0 _Bool x$r_buff0_thd2; [L729] 0 _Bool x$r_buff0_thd3; [L730] 0 _Bool x$r_buff1_thd0; [L731] 0 _Bool x$r_buff1_thd1; [L732] 0 _Bool x$r_buff1_thd2; [L733] 0 _Bool x$r_buff1_thd3; [L734] 0 _Bool x$read_delayed; [L735] 0 int *x$read_delayed_var; [L736] 0 int x$w_buff0; [L737] 0 _Bool x$w_buff0_used; [L738] 0 int x$w_buff1; [L739] 0 _Bool x$w_buff1_used; [L741] 0 int y = 0; [L743] 0 int z = 0; [L744] 0 _Bool weak$$choice0; [L745] 0 _Bool weak$$choice2; [L835] 0 pthread_t t299[2]; [L836] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t299={5:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0, z=0] [L836] COND TRUE 0 asdf<2 [L836] FCALL, FORK 0 pthread_create(&t299[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a=0, arg={0:0}, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t299[asdf], ((void *)0), P0, ((void *)0))=-4, t299={5:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0, z=0] [L836] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t299={5:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0, z=0] [L836] COND TRUE 0 asdf<2 [L836] FCALL, FORK 0 pthread_create(&t299[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t299[asdf], ((void *)0), P0, ((void *)0))=-3, t299={5:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0, z=0] [L836] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a=0, arg={0:0}, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t299={5:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0, z=0] [L836] COND FALSE 0 !(asdf<2) [L837] 0 pthread_t t300[2]; [L838] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a=0, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t299={5:0}, t300={3:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0, z=0] [L838] COND TRUE 0 asdf<2 [L838] FCALL, FORK 0 pthread_create(&t300[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a=0, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t300[asdf], ((void *)0), P1, ((void *)0))=-2, t299={5:0}, t300={3:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=0, x$r_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=0, x$w_buff0_used=0, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0, z=0] [L769] 3 x$w_buff1 = x$w_buff0 [L770] 3 x$w_buff0 = 2 [L771] 3 x$w_buff1_used = x$w_buff0_used [L772] 3 x$w_buff0_used = (_Bool)1 [L773] CALL 3 __VERIFIER_assert(!(x$w_buff1_used && x$w_buff0_used)) [L18] COND FALSE 3 !(!expression) [L773] RET 3 __VERIFIER_assert(!(x$w_buff1_used && x$w_buff0_used)) [L774] 3 x$r_buff1_thd0 = x$r_buff0_thd0 [L775] 3 x$r_buff1_thd1 = x$r_buff0_thd1 [L776] 3 x$r_buff1_thd2 = x$r_buff0_thd2 [L777] 3 x$r_buff1_thd3 = x$r_buff0_thd3 [L778] 3 x$r_buff0_thd2 = (_Bool)1 VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a=0, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=1, x$r_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=2, x$w_buff0_used=1, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0, z=0] [L838] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a=0, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t299={5:0}, t300={3:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=1, x$r_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=2, x$w_buff0_used=1, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0, z=0] [L838] COND TRUE 0 asdf<2 [L838] FCALL, FORK 0 pthread_create(&t300[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a=0, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t300[asdf], ((void *)0), P1, ((void *)0))=-1, t299={5:0}, t300={3:0}, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=1, x$r_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=2, x$w_buff0_used=1, x$w_buff1=0, x$w_buff1_used=0, x=0, y=0, z=0] [L769] 4 x$w_buff1 = x$w_buff0 [L770] 4 x$w_buff0 = 2 [L771] 4 x$w_buff1_used = x$w_buff0_used [L772] 4 x$w_buff0_used = (_Bool)1 [L773] CALL 4 __VERIFIER_assert(!(x$w_buff1_used && x$w_buff0_used)) [L18] COND TRUE 4 !expression [L18] 4 reach_error() VAL [\old(expression)=0, __unbuffered_cnt=0, __unbuffered_p1_EAX=0, __unbuffered_p1_EBX=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, a=0, arg={0:0}, expression=0, main$tmp_guard0=0, main$tmp_guard1=0, weak$$choice0=0, weak$$choice2=0, x$flush_delayed=0, x$mem_tmp=0, x$r_buff0_thd0=0, x$r_buff0_thd1=0, x$r_buff0_thd2=1, x$r_buff0_thd3=0, x$r_buff1_thd0=0, x$r_buff1_thd1=0, x$r_buff1_thd2=0, x$r_buff1_thd3=0, x$read_delayed=0, x$read_delayed_var={0:0}, x$w_buff0=2, x$w_buff0_used=1, x$w_buff1=2, x$w_buff1_used=1, x=0, y=0, z=0] - UnprovableResult [Line: 18]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 159 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.0s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 56 IncrementalHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 7 mSDtfsCounter, 56 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, 187 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: 76.9s, OverallIterations: 7, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 70.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 345 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 289 mSDsluCounter, 4 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 718 IncrementalHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 4 mSDtfsCounter, 718 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=173occurred in iteration=5, InterpolantAutomatonStates: 28, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 228 NumberOfCodeBlocks, 228 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 251 ConstructedInterpolants, 0 QuantifiedInterpolants, 421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1155 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, 187 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: 197.7s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 193.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 92 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 63 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 353 IncrementalHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 3 mSDtfsCounter, 353 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=191occurred in iteration=4, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 69 NumberOfCodeBlocks, 69 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 112 SizeOfPredicates, 0 NumberOfNonLiveVariables, 160 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 12/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-03 23:17:21,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...