/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:19:53,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:19:53,957 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:19:53,962 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:19:53,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:19:53,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:19:53,963 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:19:53,996 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:19:53,997 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:19:54,001 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:19:54,001 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:19:54,002 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:19:54,002 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:19:54,004 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:19:54,004 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:19:54,004 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:19:54,004 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:19:54,004 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:19:54,005 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:19:54,005 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:19:54,005 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:19:54,005 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:19:54,006 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:19:54,006 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:19:54,006 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:19:54,006 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:19:54,006 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:19:54,007 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:19:54,007 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:19:54,007 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:19:54,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:19:54,008 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:19:54,009 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:19:54,009 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:19:54,009 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:19:54,009 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:19:54,009 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:19:54,009 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:19:54,009 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:19:54,009 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:19:54,010 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:19:54,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:19:54,239 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:19:54,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:19:54,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:19:54,266 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:19:54,267 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:19:54,268 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 06:19:55,492 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:19:55,716 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:19:55,717 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 06:19:55,737 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7749b71ad/2cadd6205772453ba383d4552a54086b/FLAG429e80e68 [2023-08-04 06:19:55,749 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7749b71ad/2cadd6205772453ba383d4552a54086b [2023-08-04 06:19:55,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:19:55,752 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:19:55,753 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:19:55,753 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:19:55,756 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:19:55,757 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:19:55" (1/1) ... [2023-08-04 06:19:55,758 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad34ee7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:55, skipping insertion in model container [2023-08-04 06:19:55,758 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:19:55" (1/1) ... [2023-08-04 06:19:55,796 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:19:55,958 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_mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt_bound2.i[983,996] [2023-08-04 06:19:56,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:19:56,204 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:19:56,223 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_mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt_bound2.i[983,996] [2023-08-04 06:19:56,244 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:19:56,250 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 06:19:56,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:19:56,333 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:19:56,333 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:19:56,339 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:19:56,339 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56 WrapperNode [2023-08-04 06:19:56,340 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:19:56,342 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:19:56,342 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:19:56,342 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:19:56,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56" (1/1) ... [2023-08-04 06:19:56,379 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56" (1/1) ... [2023-08-04 06:19:56,409 INFO L138 Inliner]: procedures = 177, calls = 67, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 191 [2023-08-04 06:19:56,410 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:19:56,410 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:19:56,410 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:19:56,411 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:19:56,427 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56" (1/1) ... [2023-08-04 06:19:56,428 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56" (1/1) ... [2023-08-04 06:19:56,430 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56" (1/1) ... [2023-08-04 06:19:56,431 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56" (1/1) ... [2023-08-04 06:19:56,438 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56" (1/1) ... [2023-08-04 06:19:56,454 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56" (1/1) ... [2023-08-04 06:19:56,462 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56" (1/1) ... [2023-08-04 06:19:56,464 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56" (1/1) ... [2023-08-04 06:19:56,467 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:19:56,468 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:19:56,468 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:19:56,468 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:19:56,469 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56" (1/1) ... [2023-08-04 06:19:56,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:19:56,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:19:56,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 06:19:56,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 06:19:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:19:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:19:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:19:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:19:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:19:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:19:56,542 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:19:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:19:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:19:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:19:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:19:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 06:19:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 06:19:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:19:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:19:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:19:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:19:56,545 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 06:19:56,682 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:19:56,683 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:19:56,951 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:19:57,118 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:19:57,118 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 06:19:57,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:19:57 BoogieIcfgContainer [2023-08-04 06:19:57,121 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:19:57,142 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:19:57,143 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:19:57,146 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:19:57,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:19:55" (1/3) ... [2023-08-04 06:19:57,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@898570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:19:57, skipping insertion in model container [2023-08-04 06:19:57,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:19:56" (2/3) ... [2023-08-04 06:19:57,148 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@898570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:19:57, skipping insertion in model container [2023-08-04 06:19:57,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:19:57" (3/3) ... [2023-08-04 06:19:57,149 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 06:19:57,155 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:19:57,162 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:19:57,162 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-08-04 06:19:57,162 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:19:57,211 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:19:57,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 153 transitions, 326 flow [2023-08-04 06:19:57,436 INFO L124 PetriNetUnfolderBase]: 62/926 cut-off events. [2023-08-04 06:19:57,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:19:57,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 926 events. 62/926 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5704 event pairs, 0 based on Foata normal form. 0/810 useless extension candidates. Maximal degree in co-relation 547. Up to 32 conditions per place. [2023-08-04 06:19:57,444 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 153 transitions, 326 flow [2023-08-04 06:19:57,453 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 150 transitions, 314 flow [2023-08-04 06:19:57,456 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:19:57,466 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 150 transitions, 314 flow [2023-08-04 06:19:57,468 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 150 transitions, 314 flow [2023-08-04 06:19:57,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 150 transitions, 314 flow [2023-08-04 06:19:57,565 INFO L124 PetriNetUnfolderBase]: 62/919 cut-off events. [2023-08-04 06:19:57,565 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:19:57,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 919 events. 62/919 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5638 event pairs, 0 based on Foata normal form. 0/803 useless extension candidates. Maximal degree in co-relation 533. Up to 32 conditions per place. [2023-08-04 06:19:57,582 INFO L119 LiptonReduction]: Number of co-enabled transitions 3794 [2023-08-04 06:20:01,404 INFO L134 LiptonReduction]: Checked pairs total: 8479 [2023-08-04 06:20:01,404 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-04 06:20:01,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:20:01,421 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;@2a3934a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:20:01,422 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:20:01,427 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:20:01,428 INFO L124 PetriNetUnfolderBase]: 1/35 cut-off events. [2023-08-04 06:20:01,428 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:20:01,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:20:01,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:20:01,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P3Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:20:01,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:20:01,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1703273212, now seen corresponding path program 1 times [2023-08-04 06:20:01,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:20:01,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859992601] [2023-08-04 06:20:01,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:20:01,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:20:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:20:01,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 06:20:01,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:20:01,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859992601] [2023-08-04 06:20:01,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859992601] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:20:01,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:20:01,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:20:01,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959315348] [2023-08-04 06:20:01,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:20:01,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:20:01,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:20:01,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:20:01,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:20:01,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 280 [2023-08-04 06:20:01,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:01,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:20:01,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 280 [2023-08-04 06:20:01,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:20:03,045 INFO L124 PetriNetUnfolderBase]: 7844/11591 cut-off events. [2023-08-04 06:20:03,045 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-04 06:20:03,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23177 conditions, 11591 events. 7844/11591 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 73143 event pairs, 5586 based on Foata normal form. 360/10172 useless extension candidates. Maximal degree in co-relation 23163. Up to 11232 conditions per place. [2023-08-04 06:20:03,120 INFO L140 encePairwiseOnDemand]: 276/280 looper letters, 33 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-04 06:20:03,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 168 flow [2023-08-04 06:20:03,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:20:03,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:20:03,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-08-04 06:20:03,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2023-08-04 06:20:03,140 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-08-04 06:20:03,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-08-04 06:20:03,142 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:20:03,143 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-08-04 06:20:03,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:03,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:03,154 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:03,155 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 92 flow. Second operand 3 states and 434 transitions. [2023-08-04 06:20:03,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 168 flow [2023-08-04 06:20:03,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 41 transitions, 168 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:20:03,161 INFO L231 Difference]: Finished difference. Result has 50 places, 38 transitions, 98 flow [2023-08-04 06:20:03,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=50, PETRI_TRANSITIONS=38} [2023-08-04 06:20:03,166 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 3 predicate places. [2023-08-04 06:20:03,166 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 38 transitions, 98 flow [2023-08-04 06:20:03,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:03,166 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:20:03,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:20:03,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:20:03,167 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting P3Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:20:03,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:20:03,168 INFO L85 PathProgramCache]: Analyzing trace with hash -844829059, now seen corresponding path program 1 times [2023-08-04 06:20:03,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:20:03,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130599467] [2023-08-04 06:20:03,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:20:03,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:20:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:20:03,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 06:20:03,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:20:03,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130599467] [2023-08-04 06:20:03,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130599467] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:20:03,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:20:03,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 06:20:03,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470797965] [2023-08-04 06:20:03,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:20:03,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:20:03,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:20:03,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:20:03,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:20:03,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 280 [2023-08-04 06:20:03,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 38 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:03,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:20:03,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 280 [2023-08-04 06:20:03,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:20:04,084 INFO L124 PetriNetUnfolderBase]: 6311/9113 cut-off events. [2023-08-04 06:20:04,085 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-04 06:20:04,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18257 conditions, 9113 events. 6311/9113 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 53419 event pairs, 5455 based on Foata normal form. 0/7789 useless extension candidates. Maximal degree in co-relation 18240. Up to 8842 conditions per place. [2023-08-04 06:20:04,160 INFO L140 encePairwiseOnDemand]: 277/280 looper letters, 35 selfloop transitions, 2 changer transitions 1/43 dead transitions. [2023-08-04 06:20:04,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 43 transitions, 184 flow [2023-08-04 06:20:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:20:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:20:04,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2023-08-04 06:20:04,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2023-08-04 06:20:04,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2023-08-04 06:20:04,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2023-08-04 06:20:04,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:20:04,165 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2023-08-04 06:20:04,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:04,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:04,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:04,178 INFO L175 Difference]: Start difference. First operand has 50 places, 38 transitions, 98 flow. Second operand 3 states and 435 transitions. [2023-08-04 06:20:04,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 43 transitions, 184 flow [2023-08-04 06:20:04,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 43 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:20:04,180 INFO L231 Difference]: Finished difference. Result has 51 places, 38 transitions, 102 flow [2023-08-04 06:20:04,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=51, PETRI_TRANSITIONS=38} [2023-08-04 06:20:04,181 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2023-08-04 06:20:04,181 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 102 flow [2023-08-04 06:20:04,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:04,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:20:04,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:20:04,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 06:20:04,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting P3Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:20:04,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:20:04,185 INFO L85 PathProgramCache]: Analyzing trace with hash 2106528182, now seen corresponding path program 1 times [2023-08-04 06:20:04,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:20:04,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216859168] [2023-08-04 06:20:04,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:20:04,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:20:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:20:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 06:20:04,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:20:04,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216859168] [2023-08-04 06:20:04,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216859168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:20:04,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656017679] [2023-08-04 06:20:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:20:04,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:20:04,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:20:04,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 06:20:04,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 06:20:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:20:04,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:20:04,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:20:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 06:20:04,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:20:04,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656017679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:20:04,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:20:04,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:20:04,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143967013] [2023-08-04 06:20:04,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:20:04,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:20:04,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:20:04,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:20:04,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:20:04,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 280 [2023-08-04 06:20:04,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:04,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:20:04,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 280 [2023-08-04 06:20:04,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:20:05,051 INFO L124 PetriNetUnfolderBase]: 5387/7658 cut-off events. [2023-08-04 06:20:05,052 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 06:20:05,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15410 conditions, 7658 events. 5387/7658 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 43515 event pairs, 3830 based on Foata normal form. 0/6610 useless extension candidates. Maximal degree in co-relation 15393. Up to 7340 conditions per place. [2023-08-04 06:20:05,098 INFO L140 encePairwiseOnDemand]: 277/280 looper letters, 38 selfloop transitions, 2 changer transitions 1/46 dead transitions. [2023-08-04 06:20:05,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 46 transitions, 200 flow [2023-08-04 06:20:05,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:20:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:20:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 438 transitions. [2023-08-04 06:20:05,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2023-08-04 06:20:05,100 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 438 transitions. [2023-08-04 06:20:05,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 438 transitions. [2023-08-04 06:20:05,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:20:05,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 438 transitions. [2023-08-04 06:20:05,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:05,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:05,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 280.0) internal successors, (1120), 4 states have internal predecessors, (1120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:05,104 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 102 flow. Second operand 3 states and 438 transitions. [2023-08-04 06:20:05,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 46 transitions, 200 flow [2023-08-04 06:20:05,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 46 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:20:05,106 INFO L231 Difference]: Finished difference. Result has 52 places, 38 transitions, 106 flow [2023-08-04 06:20:05,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2023-08-04 06:20:05,106 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 5 predicate places. [2023-08-04 06:20:05,107 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 106 flow [2023-08-04 06:20:05,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:05,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:20:05,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:20:05,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 06:20:05,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:20:05,313 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting P3Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:20:05,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:20:05,314 INFO L85 PathProgramCache]: Analyzing trace with hash 835860271, now seen corresponding path program 1 times [2023-08-04 06:20:05,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:20:05,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549223291] [2023-08-04 06:20:05,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:20:05,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:20:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:20:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 06:20:05,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:20:05,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549223291] [2023-08-04 06:20:05,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549223291] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:20:05,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79248686] [2023-08-04 06:20:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:20:05,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:20:05,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:20:05,390 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 06:20:05,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 06:20:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:20:05,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:20:05,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:20:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 06:20:05,512 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:20:05,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 06:20:05,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79248686] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:20:05,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:20:05,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:20:05,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938937771] [2023-08-04 06:20:05,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:20:05,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:20:05,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:20:05,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:20:05,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:20:05,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 280 [2023-08-04 06:20:05,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 38 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:05,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:20:05,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 280 [2023-08-04 06:20:05,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:20:05,567 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 06:20:05,567 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:20:05,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46 conditions, 16 events. 4/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 20 event pairs, 0 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 06:20:05,568 INFO L140 encePairwiseOnDemand]: 277/280 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 06:20:05,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 10 transitions, 43 flow [2023-08-04 06:20:05,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:20:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:20:05,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 534 transitions. [2023-08-04 06:20:05,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4767857142857143 [2023-08-04 06:20:05,570 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 534 transitions. [2023-08-04 06:20:05,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 534 transitions. [2023-08-04 06:20:05,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:20:05,571 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 534 transitions. [2023-08-04 06:20:05,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 133.5) internal successors, (534), 4 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:05,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:05,574 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 280.0) internal successors, (1400), 5 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:05,575 INFO L175 Difference]: Start difference. First operand has 52 places, 38 transitions, 106 flow. Second operand 4 states and 534 transitions. [2023-08-04 06:20:05,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 10 transitions, 43 flow [2023-08-04 06:20:05,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:20:05,575 INFO L231 Difference]: Finished difference. Result has 19 places, 0 transitions, 0 flow [2023-08-04 06:20:05,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=280, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=19, PETRI_TRANSITIONS=0} [2023-08-04 06:20:05,588 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, -28 predicate places. [2023-08-04 06:20:05,589 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 0 transitions, 0 flow [2023-08-04 06:20:05,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 135.0) internal successors, (675), 5 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:05,591 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P3Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-04 06:20:05,592 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-04 06:20:05,592 INFO L805 garLoopResultBuilder]: Registering result SAFE for location P3Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-08-04 06:20:05,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 06:20:05,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 06:20:05,797 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 06:20:05,799 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE (1/2) [2023-08-04 06:20:05,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 153 transitions, 326 flow [2023-08-04 06:20:05,880 INFO L124 PetriNetUnfolderBase]: 62/926 cut-off events. [2023-08-04 06:20:05,880 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:20:05,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 976 conditions, 926 events. 62/926 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5704 event pairs, 0 based on Foata normal form. 0/810 useless extension candidates. Maximal degree in co-relation 547. Up to 32 conditions per place. [2023-08-04 06:20:05,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 156 places, 153 transitions, 326 flow [2023-08-04 06:20:05,884 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 128 places, 122 transitions, 264 flow [2023-08-04 06:20:05,884 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:20:05,884 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 128 places, 122 transitions, 264 flow [2023-08-04 06:20:05,885 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 128 places, 122 transitions, 264 flow [2023-08-04 06:20:05,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 128 places, 122 transitions, 264 flow [2023-08-04 06:20:05,916 INFO L124 PetriNetUnfolderBase]: 14/430 cut-off events. [2023-08-04 06:20:05,916 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:20:05,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 480 conditions, 430 events. 14/430 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2014 event pairs, 0 based on Foata normal form. 0/394 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2023-08-04 06:20:05,921 INFO L119 LiptonReduction]: Number of co-enabled transitions 2194 [2023-08-04 06:20:08,814 INFO L134 LiptonReduction]: Checked pairs total: 5598 [2023-08-04 06:20:08,814 INFO L136 LiptonReduction]: Total number of compositions: 95 [2023-08-04 06:20:08,816 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:20:08,817 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;@2a3934a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:20:08,817 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 06:20:08,820 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:20:08,820 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-08-04 06:20:08,821 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:20:08,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:20:08,821 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:20:08,821 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 06:20:08,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:20:08,821 INFO L85 PathProgramCache]: Analyzing trace with hash 105218797, now seen corresponding path program 1 times [2023-08-04 06:20:08,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:20:08,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537891509] [2023-08-04 06:20:08,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:20:08,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:20:08,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:20:08,842 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:20:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:20:08,864 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:20:08,865 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:20:08,865 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 06:20:08,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 06:20:08,865 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 06:20:08,866 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 06:20:08,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 06:20:08,866 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 06:20:08,866 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:20:08,867 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:20:08,867 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:20:08,899 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:20:08,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 184 transitions, 416 flow [2023-08-04 06:20:09,344 INFO L124 PetriNetUnfolderBase]: 282/4312 cut-off events. [2023-08-04 06:20:09,345 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 06:20:09,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4601 conditions, 4312 events. 282/4312 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 41797 event pairs, 0 based on Foata normal form. 0/3775 useless extension candidates. Maximal degree in co-relation 3107. Up to 162 conditions per place. [2023-08-04 06:20:09,367 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 184 transitions, 416 flow [2023-08-04 06:20:09,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 181 transitions, 398 flow [2023-08-04 06:20:09,377 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:20:09,377 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 181 transitions, 398 flow [2023-08-04 06:20:09,377 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 181 transitions, 398 flow [2023-08-04 06:20:09,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 181 transitions, 398 flow [2023-08-04 06:20:09,796 INFO L124 PetriNetUnfolderBase]: 282/4299 cut-off events. [2023-08-04 06:20:09,797 INFO L125 PetriNetUnfolderBase]: For 67/67 co-relation queries the response was YES. [2023-08-04 06:20:09,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4562 conditions, 4299 events. 282/4299 cut-off events. For 67/67 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 41613 event pairs, 0 based on Foata normal form. 0/3762 useless extension candidates. Maximal degree in co-relation 3068. Up to 162 conditions per place. [2023-08-04 06:20:09,885 INFO L119 LiptonReduction]: Number of co-enabled transitions 9248 [2023-08-04 06:20:13,441 INFO L134 LiptonReduction]: Checked pairs total: 23062 [2023-08-04 06:20:13,442 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-04 06:20:13,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:20:13,445 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;@2a3934a0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:20:13,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 06:20:13,448 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:20:13,448 INFO L124 PetriNetUnfolderBase]: 1/36 cut-off events. [2023-08-04 06:20:13,448 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 06:20:13,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:20:13,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:20:13,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting P3Err0ASSERT_VIOLATIONERROR_FUNCTION === [P3Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, P3Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-08-04 06:20:13,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:20:13,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1873915568, now seen corresponding path program 1 times [2023-08-04 06:20:13,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:20:13,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172242350] [2023-08-04 06:20:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:20:13,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:20:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:20:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 06:20:13,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:20:13,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172242350] [2023-08-04 06:20:13,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172242350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:20:13,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:20:13,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:20:13,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760952203] [2023-08-04 06:20:13,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:20:13,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:20:13,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:20:13,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:20:13,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:20:13,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 319 [2023-08-04 06:20:13,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 62 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:20:13,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:20:13,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 319 [2023-08-04 06:20:13,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand