/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/weaver_popl20-three-array-min.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:47:10,444 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:47:10,503 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:47:10,507 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:47:10,507 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:47:10,507 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:47:10,508 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:47:10,525 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:47:10,525 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:47:10,526 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:47:10,526 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:47:10,527 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:47:10,527 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:47:10,527 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:47:10,528 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:47:10,528 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:47:10,528 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:47:10,529 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:47:10,529 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:47:10,529 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:47:10,529 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:47:10,532 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:47:10,532 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:47:10,532 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:47:10,532 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:47:10,532 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:47:10,533 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:47:10,533 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:47:10,533 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:47:10,533 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:47:10,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:47:10,534 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:47:10,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:47:10,534 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:47:10,534 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:47:10,534 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:47:10,535 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:47:10,535 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:47:10,535 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:47:10,535 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:47:10,535 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:47:10,535 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:47:10,777 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:47:10,802 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:47:10,805 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:47:10,806 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:47:10,806 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:47:10,807 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-three-array-min.wvr_bound2.c [2023-08-04 09:47:11,933 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:47:12,143 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:47:12,144 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-three-array-min.wvr_bound2.c [2023-08-04 09:47:12,153 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae7d8f5e/2d773fdd0dfa4f599e42bea08672635a/FLAG48486aa59 [2023-08-04 09:47:12,170 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae7d8f5e/2d773fdd0dfa4f599e42bea08672635a [2023-08-04 09:47:12,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:47:12,177 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:47:12,178 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:47:12,178 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:47:12,183 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:47:12,184 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,185 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@629c47b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12, skipping insertion in model container [2023-08-04 09:47:12,185 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,214 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:47:12,357 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-three-array-min.wvr_bound2.c[3058,3071] [2023-08-04 09:47:12,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:47:12,371 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:47:12,395 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-three-array-min.wvr_bound2.c[3058,3071] [2023-08-04 09:47:12,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:47:12,410 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:47:12,410 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:47:12,415 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:47:12,415 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12 WrapperNode [2023-08-04 09:47:12,416 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:47:12,417 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:47:12,417 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:47:12,417 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:47:12,423 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,431 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,456 INFO L138 Inliner]: procedures = 26, calls = 57, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 284 [2023-08-04 09:47:12,456 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:47:12,457 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:47:12,457 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:47:12,457 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:47:12,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,466 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,470 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,470 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,479 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,484 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,487 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,493 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:47:12,493 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:47:12,494 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:47:12,494 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:47:12,494 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12" (1/1) ... [2023-08-04 09:47:12,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:47:12,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:12,525 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 09:47:12,557 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 09:47:12,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:47:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:47:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:47:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:47:12,570 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:47:12,570 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:47:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:47:12,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:47:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:47:12,572 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:47:12,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:47:12,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:47:12,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:47:12,573 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:47:12,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:47:12,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:47:12,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:47:12,575 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 09:47:12,699 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:47:12,701 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:47:13,184 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:47:13,282 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:47:13,282 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 09:47:13,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:47:13 BoogieIcfgContainer [2023-08-04 09:47:13,284 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:47:13,288 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:47:13,288 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:47:13,291 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:47:13,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:47:12" (1/3) ... [2023-08-04 09:47:13,300 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f20272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:47:13, skipping insertion in model container [2023-08-04 09:47:13,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:47:12" (2/3) ... [2023-08-04 09:47:13,301 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55f20272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:47:13, skipping insertion in model container [2023-08-04 09:47:13,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:47:13" (3/3) ... [2023-08-04 09:47:13,302 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-three-array-min.wvr_bound2.c [2023-08-04 09:47:13,309 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:47:13,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:47:13,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:47:13,316 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:47:13,390 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-04 09:47:13,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 332 transitions, 706 flow [2023-08-04 09:47:13,692 INFO L124 PetriNetUnfolderBase]: 133/949 cut-off events. [2023-08-04 09:47:13,693 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:47:13,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 949 events. 133/949 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4411 event pairs, 0 based on Foata normal form. 0/806 useless extension candidates. Maximal degree in co-relation 574. Up to 16 conditions per place. [2023-08-04 09:47:13,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 297 places, 332 transitions, 706 flow [2023-08-04 09:47:13,721 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 297 places, 332 transitions, 706 flow [2023-08-04 09:47:13,724 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:47:13,740 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 297 places, 332 transitions, 706 flow [2023-08-04 09:47:13,747 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 297 places, 332 transitions, 706 flow [2023-08-04 09:47:13,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 332 transitions, 706 flow [2023-08-04 09:47:13,877 INFO L124 PetriNetUnfolderBase]: 133/949 cut-off events. [2023-08-04 09:47:13,877 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:47:13,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 949 events. 133/949 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4411 event pairs, 0 based on Foata normal form. 0/806 useless extension candidates. Maximal degree in co-relation 574. Up to 16 conditions per place. [2023-08-04 09:47:13,901 INFO L119 LiptonReduction]: Number of co-enabled transitions 11058 [2023-08-04 09:47:22,119 INFO L134 LiptonReduction]: Checked pairs total: 20934 [2023-08-04 09:47:22,119 INFO L136 LiptonReduction]: Total number of compositions: 334 [2023-08-04 09:47:22,132 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:47:22,137 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;@295a3514, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:47:22,137 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:47:22,144 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:47:22,145 INFO L124 PetriNetUnfolderBase]: 9/59 cut-off events. [2023-08-04 09:47:22,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:47:22,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:22,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:22,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:22,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:22,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1710653042, now seen corresponding path program 1 times [2023-08-04 09:47:22,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:22,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243464495] [2023-08-04 09:47:22,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:22,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:22,426 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 09:47:22,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:22,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243464495] [2023-08-04 09:47:22,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243464495] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:22,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:47:22,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:47:22,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597294498] [2023-08-04 09:47:22,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:22,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:47:22,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:22,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:47:22,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:47:22,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 666 [2023-08-04 09:47:22,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 63 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 292.6666666666667) internal successors, (878), 3 states have internal predecessors, (878), 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 09:47:22,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:22,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 666 [2023-08-04 09:47:22,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:23,347 INFO L124 PetriNetUnfolderBase]: 7077/9413 cut-off events. [2023-08-04 09:47:23,348 INFO L125 PetriNetUnfolderBase]: For 353/353 co-relation queries the response was YES. [2023-08-04 09:47:23,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18922 conditions, 9413 events. 7077/9413 cut-off events. For 353/353 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 45729 event pairs, 2178 based on Foata normal form. 0/5346 useless extension candidates. Maximal degree in co-relation 17108. Up to 9042 conditions per place. [2023-08-04 09:47:23,400 INFO L140 encePairwiseOnDemand]: 662/666 looper letters, 58 selfloop transitions, 2 changer transitions 4/71 dead transitions. [2023-08-04 09:47:23,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 71 transitions, 306 flow [2023-08-04 09:47:23,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:47:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:47:23,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 930 transitions. [2023-08-04 09:47:23,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46546546546546547 [2023-08-04 09:47:23,417 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 930 transitions. [2023-08-04 09:47:23,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 930 transitions. [2023-08-04 09:47:23,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:23,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 930 transitions. [2023-08-04 09:47:23,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.0) internal successors, (930), 3 states have internal predecessors, (930), 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 09:47:23,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:23,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:23,437 INFO L175 Difference]: Start difference. First operand has 52 places, 63 transitions, 168 flow. Second operand 3 states and 930 transitions. [2023-08-04 09:47:23,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 71 transitions, 306 flow [2023-08-04 09:47:23,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 71 transitions, 306 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:47:23,445 INFO L231 Difference]: Finished difference. Result has 54 places, 59 transitions, 162 flow [2023-08-04 09:47:23,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=666, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=54, PETRI_TRANSITIONS=59} [2023-08-04 09:47:23,449 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-04 09:47:23,449 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 59 transitions, 162 flow [2023-08-04 09:47:23,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 292.6666666666667) internal successors, (878), 3 states have internal predecessors, (878), 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 09:47:23,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:23,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:23,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:47:23,450 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:23,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:23,451 INFO L85 PathProgramCache]: Analyzing trace with hash 156014226, now seen corresponding path program 1 times [2023-08-04 09:47:23,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:23,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029228930] [2023-08-04 09:47:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:23,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:47:23,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:23,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029228930] [2023-08-04 09:47:23,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029228930] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:47:23,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196332011] [2023-08-04 09:47:23,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:23,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:23,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:23,593 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 09:47:23,604 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 09:47:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:23,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:47:23,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:47:23,750 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 09:47:23,751 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:47:23,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196332011] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:23,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:47:23,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:47:23,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939250316] [2023-08-04 09:47:23,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:47:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:23,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:47:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:47:23,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 666 [2023-08-04 09:47:23,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 59 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 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 09:47:23,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:23,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 666 [2023-08-04 09:47:23,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:24,511 INFO L124 PetriNetUnfolderBase]: 6758/8896 cut-off events. [2023-08-04 09:47:24,512 INFO L125 PetriNetUnfolderBase]: For 346/346 co-relation queries the response was YES. [2023-08-04 09:47:24,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17891 conditions, 8896 events. 6758/8896 cut-off events. For 346/346 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 41519 event pairs, 2816 based on Foata normal form. 0/5028 useless extension candidates. Maximal degree in co-relation 16086. Up to 8560 conditions per place. [2023-08-04 09:47:24,560 INFO L140 encePairwiseOnDemand]: 663/666 looper letters, 60 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-04 09:47:24,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 310 flow [2023-08-04 09:47:24,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:47:24,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:47:24,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 931 transitions. [2023-08-04 09:47:24,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46596596596596596 [2023-08-04 09:47:24,569 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 931 transitions. [2023-08-04 09:47:24,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 931 transitions. [2023-08-04 09:47:24,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:24,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 931 transitions. [2023-08-04 09:47:24,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 310.3333333333333) internal successors, (931), 3 states have internal predecessors, (931), 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 09:47:24,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:24,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:24,579 INFO L175 Difference]: Start difference. First operand has 54 places, 59 transitions, 162 flow. Second operand 3 states and 931 transitions. [2023-08-04 09:47:24,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 310 flow [2023-08-04 09:47:24,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 294 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:47:24,585 INFO L231 Difference]: Finished difference. Result has 49 places, 59 transitions, 154 flow [2023-08-04 09:47:24,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=666, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=49, PETRI_TRANSITIONS=59} [2023-08-04 09:47:24,586 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2023-08-04 09:47:24,586 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 59 transitions, 154 flow [2023-08-04 09:47:24,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 293.6666666666667) internal successors, (881), 3 states have internal predecessors, (881), 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 09:47:24,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:24,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:24,595 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 09:47:24,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:24,793 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:24,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:24,793 INFO L85 PathProgramCache]: Analyzing trace with hash 200666719, now seen corresponding path program 1 times [2023-08-04 09:47:24,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:24,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226040726] [2023-08-04 09:47:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:24,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:24,910 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 09:47:24,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:24,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226040726] [2023-08-04 09:47:24,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226040726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:47:24,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703987722] [2023-08-04 09:47:24,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:24,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:24,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:24,912 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 09:47:24,915 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 09:47:25,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:25,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:47:25,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:47:25,015 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 09:47:25,016 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:47:25,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703987722] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:25,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:47:25,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:47:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354471809] [2023-08-04 09:47:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:25,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:47:25,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:25,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:47:25,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:47:25,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 666 [2023-08-04 09:47:25,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 59 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 294.6666666666667) internal successors, (884), 3 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:25,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:25,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 666 [2023-08-04 09:47:25,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:25,656 INFO L124 PetriNetUnfolderBase]: 6744/8882 cut-off events. [2023-08-04 09:47:25,656 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2023-08-04 09:47:25,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17890 conditions, 8882 events. 6744/8882 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 41997 event pairs, 2492 based on Foata normal form. 0/5071 useless extension candidates. Maximal degree in co-relation 11810. Up to 8186 conditions per place. [2023-08-04 09:47:25,709 INFO L140 encePairwiseOnDemand]: 663/666 looper letters, 64 selfloop transitions, 2 changer transitions 1/74 dead transitions. [2023-08-04 09:47:25,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 74 transitions, 318 flow [2023-08-04 09:47:25,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:47:25,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:47:25,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 935 transitions. [2023-08-04 09:47:25,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46796796796796797 [2023-08-04 09:47:25,714 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 935 transitions. [2023-08-04 09:47:25,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 935 transitions. [2023-08-04 09:47:25,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:25,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 935 transitions. [2023-08-04 09:47:25,716 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 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 09:47:25,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:25,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:25,721 INFO L175 Difference]: Start difference. First operand has 49 places, 59 transitions, 154 flow. Second operand 3 states and 935 transitions. [2023-08-04 09:47:25,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 74 transitions, 318 flow [2023-08-04 09:47:25,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 74 transitions, 314 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:47:25,726 INFO L231 Difference]: Finished difference. Result has 50 places, 59 transitions, 158 flow [2023-08-04 09:47:25,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=666, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=50, PETRI_TRANSITIONS=59} [2023-08-04 09:47:25,728 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-08-04 09:47:25,728 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 59 transitions, 158 flow [2023-08-04 09:47:25,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 294.6666666666667) internal successors, (884), 3 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:25,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:25,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:25,736 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 09:47:25,936 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,SelfDestructingSolverStorable2 [2023-08-04 09:47:25,936 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:25,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:25,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1331054137, now seen corresponding path program 1 times [2023-08-04 09:47:25,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:25,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639651994] [2023-08-04 09:47:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:25,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:26,035 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 09:47:26,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:26,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639651994] [2023-08-04 09:47:26,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639651994] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:47:26,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337510557] [2023-08-04 09:47:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:26,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:26,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:26,037 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:47:26,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:47:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:26,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:47:26,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:47:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:47:26,143 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:47:26,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337510557] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:26,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:47:26,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:47:26,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737263178] [2023-08-04 09:47:26,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:26,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:47:26,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:26,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:47:26,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:47:26,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 666 [2023-08-04 09:47:26,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 59 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 295.6666666666667) internal successors, (887), 3 states have internal predecessors, (887), 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 09:47:26,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:26,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 666 [2023-08-04 09:47:26,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:26,618 INFO L124 PetriNetUnfolderBase]: 3980/5370 cut-off events. [2023-08-04 09:47:26,618 INFO L125 PetriNetUnfolderBase]: For 135/135 co-relation queries the response was YES. [2023-08-04 09:47:26,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11075 conditions, 5370 events. 3980/5370 cut-off events. For 135/135 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23690 event pairs, 1489 based on Foata normal form. 0/3182 useless extension candidates. Maximal degree in co-relation 7007. Up to 4062 conditions per place. [2023-08-04 09:47:26,643 INFO L140 encePairwiseOnDemand]: 663/666 looper letters, 69 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 09:47:26,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 78 transitions, 344 flow [2023-08-04 09:47:26,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:47:26,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:47:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 939 transitions. [2023-08-04 09:47:26,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46996996996997 [2023-08-04 09:47:26,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 939 transitions. [2023-08-04 09:47:26,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 939 transitions. [2023-08-04 09:47:26,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:26,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 939 transitions. [2023-08-04 09:47:26,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.0) internal successors, (939), 3 states have internal predecessors, (939), 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 09:47:26,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:26,653 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:26,653 INFO L175 Difference]: Start difference. First operand has 50 places, 59 transitions, 158 flow. Second operand 3 states and 939 transitions. [2023-08-04 09:47:26,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 78 transitions, 344 flow [2023-08-04 09:47:26,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 78 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:47:26,656 INFO L231 Difference]: Finished difference. Result has 51 places, 60 transitions, 166 flow [2023-08-04 09:47:26,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=666, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=51, PETRI_TRANSITIONS=60} [2023-08-04 09:47:26,656 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2023-08-04 09:47:26,657 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 60 transitions, 166 flow [2023-08-04 09:47:26,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 295.6666666666667) internal successors, (887), 3 states have internal predecessors, (887), 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 09:47:26,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:26,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:26,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:47:26,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:26,864 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:26,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash 972478134, now seen corresponding path program 1 times [2023-08-04 09:47:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:26,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110712932] [2023-08-04 09:47:26,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:26,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:47:26,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:26,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110712932] [2023-08-04 09:47:26,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110712932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:47:26,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987123098] [2023-08-04 09:47:26,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:26,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:26,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:26,960 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:47:26,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:47:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:27,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:47:27,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:47:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:47:27,079 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:47:27,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987123098] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:27,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:47:27,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:47:27,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901906751] [2023-08-04 09:47:27,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:27,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:47:27,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:27,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:47:27,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:47:27,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 666 [2023-08-04 09:47:27,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 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 09:47:27,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:27,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 666 [2023-08-04 09:47:27,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:27,456 INFO L124 PetriNetUnfolderBase]: 3225/4375 cut-off events. [2023-08-04 09:47:27,456 INFO L125 PetriNetUnfolderBase]: For 302/302 co-relation queries the response was YES. [2023-08-04 09:47:27,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9287 conditions, 4375 events. 3225/4375 cut-off events. For 302/302 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18566 event pairs, 1394 based on Foata normal form. 0/2735 useless extension candidates. Maximal degree in co-relation 5935. Up to 3637 conditions per place. [2023-08-04 09:47:27,473 INFO L140 encePairwiseOnDemand]: 663/666 looper letters, 70 selfloop transitions, 2 changer transitions 0/79 dead transitions. [2023-08-04 09:47:27,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 79 transitions, 354 flow [2023-08-04 09:47:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:47:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:47:27,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 939 transitions. [2023-08-04 09:47:27,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46996996996997 [2023-08-04 09:47:27,476 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 939 transitions. [2023-08-04 09:47:27,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 939 transitions. [2023-08-04 09:47:27,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:27,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 939 transitions. [2023-08-04 09:47:27,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 313.0) internal successors, (939), 3 states have internal predecessors, (939), 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 09:47:27,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:27,483 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:27,483 INFO L175 Difference]: Start difference. First operand has 51 places, 60 transitions, 166 flow. Second operand 3 states and 939 transitions. [2023-08-04 09:47:27,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 79 transitions, 354 flow [2023-08-04 09:47:27,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 79 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:47:27,489 INFO L231 Difference]: Finished difference. Result has 53 places, 61 transitions, 176 flow [2023-08-04 09:47:27,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=666, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=53, PETRI_TRANSITIONS=61} [2023-08-04 09:47:27,489 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-04 09:47:27,489 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 61 transitions, 176 flow [2023-08-04 09:47:27,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 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 09:47:27,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:27,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:27,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:47:27,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:27,700 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:27,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:27,700 INFO L85 PathProgramCache]: Analyzing trace with hash -83388431, now seen corresponding path program 1 times [2023-08-04 09:47:27,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:27,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984503908] [2023-08-04 09:47:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:27,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:47:27,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:27,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984503908] [2023-08-04 09:47:27,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984503908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:47:27,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920952892] [2023-08-04 09:47:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:27,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:27,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:27,764 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:47:27,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:47:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:27,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:47:27,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:47:27,880 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:47:27,881 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:47:27,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920952892] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:27,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:47:27,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:47:27,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425857890] [2023-08-04 09:47:27,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:27,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:47:27,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:27,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:47:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:47:27,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 666 [2023-08-04 09:47:27,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 61 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 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 09:47:27,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:27,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 666 [2023-08-04 09:47:27,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:28,220 INFO L124 PetriNetUnfolderBase]: 3182/4306 cut-off events. [2023-08-04 09:47:28,220 INFO L125 PetriNetUnfolderBase]: For 268/268 co-relation queries the response was YES. [2023-08-04 09:47:28,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9211 conditions, 4306 events. 3182/4306 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18131 event pairs, 1572 based on Foata normal form. 0/2715 useless extension candidates. Maximal degree in co-relation 7410. Up to 4107 conditions per place. [2023-08-04 09:47:28,240 INFO L140 encePairwiseOnDemand]: 663/666 looper letters, 64 selfloop transitions, 2 changer transitions 3/76 dead transitions. [2023-08-04 09:47:28,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 76 transitions, 344 flow [2023-08-04 09:47:28,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:47:28,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:47:28,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 935 transitions. [2023-08-04 09:47:28,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46796796796796797 [2023-08-04 09:47:28,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 935 transitions. [2023-08-04 09:47:28,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 935 transitions. [2023-08-04 09:47:28,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:28,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 935 transitions. [2023-08-04 09:47:28,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 311.6666666666667) internal successors, (935), 3 states have internal predecessors, (935), 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 09:47:28,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:28,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:28,250 INFO L175 Difference]: Start difference. First operand has 53 places, 61 transitions, 176 flow. Second operand 3 states and 935 transitions. [2023-08-04 09:47:28,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 76 transitions, 344 flow [2023-08-04 09:47:28,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 342 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:47:28,259 INFO L231 Difference]: Finished difference. Result has 55 places, 59 transitions, 174 flow [2023-08-04 09:47:28,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=666, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=55, PETRI_TRANSITIONS=59} [2023-08-04 09:47:28,259 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2023-08-04 09:47:28,259 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 59 transitions, 174 flow [2023-08-04 09:47:28,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 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 09:47:28,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:28,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:28,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:47:28,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:28,466 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:28,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:28,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1234502347, now seen corresponding path program 1 times [2023-08-04 09:47:28,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:28,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87010069] [2023-08-04 09:47:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:28,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:47:28,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:28,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87010069] [2023-08-04 09:47:28,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87010069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:47:28,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647645159] [2023-08-04 09:47:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:28,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:28,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:28,539 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:47:28,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:47:28,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:28,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:47:28,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:47:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:47:28,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:47:28,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647645159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:28,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:47:28,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:47:28,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364915304] [2023-08-04 09:47:28,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:28,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:47:28,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:28,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:47:28,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:47:28,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 666 [2023-08-04 09:47:28,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 59 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 291.6666666666667) internal successors, (875), 3 states have internal predecessors, (875), 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 09:47:28,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:28,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 666 [2023-08-04 09:47:28,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:29,082 INFO L124 PetriNetUnfolderBase]: 3093/4150 cut-off events. [2023-08-04 09:47:29,082 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-04 09:47:29,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8850 conditions, 4150 events. 3093/4150 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17244 event pairs, 1548 based on Foata normal form. 0/2600 useless extension candidates. Maximal degree in co-relation 8649. Up to 4027 conditions per place. [2023-08-04 09:47:29,103 INFO L140 encePairwiseOnDemand]: 663/666 looper letters, 51 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2023-08-04 09:47:29,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 282 flow [2023-08-04 09:47:29,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:47:29,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:47:29,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 897 transitions. [2023-08-04 09:47:29,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44894894894894893 [2023-08-04 09:47:29,107 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 897 transitions. [2023-08-04 09:47:29,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 897 transitions. [2023-08-04 09:47:29,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:29,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 897 transitions. [2023-08-04 09:47:29,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.0) internal successors, (897), 3 states have internal predecessors, (897), 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 09:47:29,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:29,112 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 666.0) internal successors, (2664), 4 states have internal predecessors, (2664), 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 09:47:29,113 INFO L175 Difference]: Start difference. First operand has 55 places, 59 transitions, 174 flow. Second operand 3 states and 897 transitions. [2023-08-04 09:47:29,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 282 flow [2023-08-04 09:47:29,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 60 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:47:29,120 INFO L231 Difference]: Finished difference. Result has 56 places, 60 transitions, 182 flow [2023-08-04 09:47:29,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=666, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=56, PETRI_TRANSITIONS=60} [2023-08-04 09:47:29,121 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 4 predicate places. [2023-08-04 09:47:29,121 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 60 transitions, 182 flow [2023-08-04 09:47:29,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 291.6666666666667) internal successors, (875), 3 states have internal predecessors, (875), 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 09:47:29,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:29,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:29,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:47:29,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:29,328 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:29,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:29,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2118944702, now seen corresponding path program 1 times [2023-08-04 09:47:29,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:29,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557385385] [2023-08-04 09:47:29,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:29,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:29,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:47:29,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:29,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557385385] [2023-08-04 09:47:29,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557385385] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:47:29,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933306029] [2023-08-04 09:47:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:29,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:29,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:29,416 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) [2023-08-04 09:47:29,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:47:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:29,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 09:47:29,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:47:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:47:29,566 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:47:29,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933306029] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:29,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:47:29,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2023-08-04 09:47:29,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064486861] [2023-08-04 09:47:29,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:29,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:47:29,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:29,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:47:29,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-04 09:47:29,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 666 [2023-08-04 09:47:29,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 60 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 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 09:47:29,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:29,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 666 [2023-08-04 09:47:29,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:29,955 INFO L124 PetriNetUnfolderBase]: 3093/4152 cut-off events. [2023-08-04 09:47:29,955 INFO L125 PetriNetUnfolderBase]: For 175/175 co-relation queries the response was YES. [2023-08-04 09:47:29,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8845 conditions, 4152 events. 3093/4152 cut-off events. For 175/175 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17219 event pairs, 1548 based on Foata normal form. 1/2603 useless extension candidates. Maximal degree in co-relation 8825. Up to 4026 conditions per place. [2023-08-04 09:47:29,973 INFO L140 encePairwiseOnDemand]: 659/666 looper letters, 49 selfloop transitions, 6 changer transitions 0/62 dead transitions. [2023-08-04 09:47:29,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 296 flow [2023-08-04 09:47:29,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:47:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:47:29,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1173 transitions. [2023-08-04 09:47:29,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403153153153153 [2023-08-04 09:47:29,976 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1173 transitions. [2023-08-04 09:47:29,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1173 transitions. [2023-08-04 09:47:29,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:29,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1173 transitions. [2023-08-04 09:47:29,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 293.25) internal successors, (1173), 4 states have internal predecessors, (1173), 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 09:47:29,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 666.0) internal successors, (3330), 5 states have internal predecessors, (3330), 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 09:47:29,983 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 666.0) internal successors, (3330), 5 states have internal predecessors, (3330), 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 09:47:29,984 INFO L175 Difference]: Start difference. First operand has 56 places, 60 transitions, 182 flow. Second operand 4 states and 1173 transitions. [2023-08-04 09:47:29,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 296 flow [2023-08-04 09:47:29,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 62 transitions, 292 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:47:29,990 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 206 flow [2023-08-04 09:47:29,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=666, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=206, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2023-08-04 09:47:29,991 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2023-08-04 09:47:29,991 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 206 flow [2023-08-04 09:47:29,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 287.25) internal successors, (1149), 4 states have internal predecessors, (1149), 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 09:47:29,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:29,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:30,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:47:30,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:30,198 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:30,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:30,199 INFO L85 PathProgramCache]: Analyzing trace with hash -642924106, now seen corresponding path program 1 times [2023-08-04 09:47:30,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:30,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044753232] [2023-08-04 09:47:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:30,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:47:30,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:30,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044753232] [2023-08-04 09:47:30,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044753232] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:47:30,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714963156] [2023-08-04 09:47:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:30,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:30,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:30,264 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:47:30,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:47:30,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:30,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:47:30,385 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:47:30,398 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:47:30,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:47:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:47:30,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714963156] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:47:30,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:47:30,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:47:30,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238660820] [2023-08-04 09:47:30,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:47:30,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:47:30,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:30,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:47:30,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:47:30,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 288 out of 666 [2023-08-04 09:47:30,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 206 flow. Second operand has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 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 09:47:30,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:30,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 288 of 666 [2023-08-04 09:47:30,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:30,466 INFO L124 PetriNetUnfolderBase]: 25/55 cut-off events. [2023-08-04 09:47:30,466 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:47:30,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 55 events. 25/55 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 114 event pairs, 1 based on Foata normal form. 7/51 useless extension candidates. Maximal degree in co-relation 130. Up to 33 conditions per place. [2023-08-04 09:47:30,467 INFO L140 encePairwiseOnDemand]: 663/666 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2023-08-04 09:47:30,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 158 flow [2023-08-04 09:47:30,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:47:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:47:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1180 transitions. [2023-08-04 09:47:30,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44294294294294295 [2023-08-04 09:47:30,470 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1180 transitions. [2023-08-04 09:47:30,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1180 transitions. [2023-08-04 09:47:30,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:30,471 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1180 transitions. [2023-08-04 09:47:30,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 295.0) internal successors, (1180), 4 states have internal predecessors, (1180), 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 09:47:30,476 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 666.0) internal successors, (3330), 5 states have internal predecessors, (3330), 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 09:47:30,477 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 666.0) internal successors, (3330), 5 states have internal predecessors, (3330), 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 09:47:30,477 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 206 flow. Second operand 4 states and 1180 transitions. [2023-08-04 09:47:30,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 158 flow [2023-08-04 09:47:30,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 155 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:47:30,478 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-04 09:47:30,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=666, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-04 09:47:30,479 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -21 predicate places. [2023-08-04 09:47:30,479 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-04 09:47:30,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 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 09:47:30,482 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:47:30,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:47:30,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-04 09:47:30,692 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:30,693 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:47:30,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 332 transitions, 706 flow [2023-08-04 09:47:30,781 INFO L124 PetriNetUnfolderBase]: 133/949 cut-off events. [2023-08-04 09:47:30,781 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:47:30,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 949 events. 133/949 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4411 event pairs, 0 based on Foata normal form. 0/806 useless extension candidates. Maximal degree in co-relation 574. Up to 16 conditions per place. [2023-08-04 09:47:30,786 INFO L82 GeneralOperation]: Start removeDead. Operand has 297 places, 332 transitions, 706 flow [2023-08-04 09:47:30,789 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 297 places, 332 transitions, 706 flow [2023-08-04 09:47:30,789 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:47:30,790 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 297 places, 332 transitions, 706 flow [2023-08-04 09:47:30,790 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 297 places, 332 transitions, 706 flow [2023-08-04 09:47:30,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 297 places, 332 transitions, 706 flow [2023-08-04 09:47:30,870 INFO L124 PetriNetUnfolderBase]: 133/949 cut-off events. [2023-08-04 09:47:30,870 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 09:47:30,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1010 conditions, 949 events. 133/949 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4411 event pairs, 0 based on Foata normal form. 0/806 useless extension candidates. Maximal degree in co-relation 574. Up to 16 conditions per place. [2023-08-04 09:47:30,888 INFO L119 LiptonReduction]: Number of co-enabled transitions 11058 [2023-08-04 09:47:38,536 INFO L134 LiptonReduction]: Checked pairs total: 21299 [2023-08-04 09:47:38,537 INFO L136 LiptonReduction]: Total number of compositions: 338 [2023-08-04 09:47:38,538 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:47:38,539 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;@295a3514, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:47:38,539 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 09:47:38,544 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:47:38,544 INFO L124 PetriNetUnfolderBase]: 6/41 cut-off events. [2023-08-04 09:47:38,544 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:47:38,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:38,544 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:38,545 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:47:38,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:38,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1685194021, now seen corresponding path program 1 times [2023-08-04 09:47:38,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:38,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489043199] [2023-08-04 09:47:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:38,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:38,605 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 09:47:38,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:38,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489043199] [2023-08-04 09:47:38,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489043199] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:38,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:47:38,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:47:38,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406006549] [2023-08-04 09:47:38,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:38,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:47:38,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:38,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:47:38,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:47:38,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 281 out of 670 [2023-08-04 09:47:38,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 64 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 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 09:47:38,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:38,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 281 of 670 [2023-08-04 09:47:38,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:39,226 INFO L124 PetriNetUnfolderBase]: 7530/9917 cut-off events. [2023-08-04 09:47:39,226 INFO L125 PetriNetUnfolderBase]: For 436/436 co-relation queries the response was YES. [2023-08-04 09:47:39,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19946 conditions, 9917 events. 7530/9917 cut-off events. For 436/436 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 47447 event pairs, 3498 based on Foata normal form. 0/5468 useless extension candidates. Maximal degree in co-relation 17676. Up to 9580 conditions per place. [2023-08-04 09:47:39,249 INFO L140 encePairwiseOnDemand]: 666/670 looper letters, 31 selfloop transitions, 2 changer transitions 23/64 dead transitions. [2023-08-04 09:47:39,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 64 transitions, 276 flow [2023-08-04 09:47:39,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:47:39,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:47:39,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 898 transitions. [2023-08-04 09:47:39,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44676616915422884 [2023-08-04 09:47:39,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 898 transitions. [2023-08-04 09:47:39,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 898 transitions. [2023-08-04 09:47:39,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:39,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 898 transitions. [2023-08-04 09:47:39,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 299.3333333333333) internal successors, (898), 3 states have internal predecessors, (898), 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 09:47:39,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 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 09:47:39,258 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 670.0) internal successors, (2680), 4 states have internal predecessors, (2680), 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 09:47:39,258 INFO L175 Difference]: Start difference. First operand has 53 places, 64 transitions, 170 flow. Second operand 3 states and 898 transitions. [2023-08-04 09:47:39,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 64 transitions, 276 flow [2023-08-04 09:47:39,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 64 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:47:39,260 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 107 flow [2023-08-04 09:47:39,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2023-08-04 09:47:39,261 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 2 predicate places. [2023-08-04 09:47:39,261 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 107 flow [2023-08-04 09:47:39,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 283.3333333333333) internal successors, (850), 3 states have internal predecessors, (850), 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 09:47:39,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:39,262 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:39,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:47:39,262 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:47:39,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:39,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1461056065, now seen corresponding path program 1 times [2023-08-04 09:47:39,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:39,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541246578] [2023-08-04 09:47:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:39,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:47:39,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:39,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541246578] [2023-08-04 09:47:39,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541246578] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:39,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:47:39,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:47:39,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179784133] [2023-08-04 09:47:39,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:39,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:47:39,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:39,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:47:39,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:47:39,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 670 [2023-08-04 09:47:39,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 107 flow. Second operand 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) [2023-08-04 09:47:39,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:39,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 670 [2023-08-04 09:47:39,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:47:39,589 INFO L124 PetriNetUnfolderBase]: 1783/2436 cut-off events. [2023-08-04 09:47:39,589 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-04 09:47:39,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4943 conditions, 2436 events. 1783/2436 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10195 event pairs, 815 based on Foata normal form. 0/1415 useless extension candidates. Maximal degree in co-relation 4929. Up to 2324 conditions per place. [2023-08-04 09:47:39,602 INFO L140 encePairwiseOnDemand]: 663/670 looper letters, 29 selfloop transitions, 6 changer transitions 0/43 dead transitions. [2023-08-04 09:47:39,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 181 flow [2023-08-04 09:47:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:47:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:47:39,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1153 transitions. [2023-08-04 09:47:39,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43022388059701494 [2023-08-04 09:47:39,606 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1153 transitions. [2023-08-04 09:47:39,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1153 transitions. [2023-08-04 09:47:39,607 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:47:39,607 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1153 transitions. [2023-08-04 09:47:39,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 288.25) internal successors, (1153), 4 states have internal predecessors, (1153), 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 09:47:39,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 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 09:47:39,614 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 670.0) internal successors, (3350), 5 states have internal predecessors, (3350), 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 09:47:39,614 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 107 flow. Second operand 4 states and 1153 transitions. [2023-08-04 09:47:39,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 181 flow [2023-08-04 09:47:39,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 177 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 09:47:39,615 INFO L231 Difference]: Finished difference. Result has 44 places, 43 transitions, 131 flow [2023-08-04 09:47:39,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=670, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=44, PETRI_TRANSITIONS=43} [2023-08-04 09:47:39,616 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -9 predicate places. [2023-08-04 09:47:39,616 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 43 transitions, 131 flow [2023-08-04 09:47:39,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2023-08-04 09:47:39,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:39,617 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:39,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 09:47:39,617 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 09:47:39,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:39,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1202980994, now seen corresponding path program 1 times [2023-08-04 09:47:39,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:39,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457569360] [2023-08-04 09:47:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:39,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:39,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:47:39,674 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:47:39,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:47:39,761 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:47:39,762 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:47:39,762 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 09:47:39,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 09:47:39,762 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 09:47:39,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 09:47:39,763 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-08-04 09:47:39,763 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:47:39,764 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:47:39,764 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:47:39,807 INFO L144 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2023-08-04 09:47:39,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 392 transitions, 874 flow [2023-08-04 09:47:40,515 INFO L124 PetriNetUnfolderBase]: 1051/5615 cut-off events. [2023-08-04 09:47:40,516 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:47:40,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6289 conditions, 5615 events. 1051/5615 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 47513 event pairs, 11 based on Foata normal form. 0/4808 useless extension candidates. Maximal degree in co-relation 3274. Up to 192 conditions per place. [2023-08-04 09:47:40,573 INFO L82 GeneralOperation]: Start removeDead. Operand has 345 places, 392 transitions, 874 flow [2023-08-04 09:47:40,604 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 345 places, 392 transitions, 874 flow [2023-08-04 09:47:40,605 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:47:40,605 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 345 places, 392 transitions, 874 flow [2023-08-04 09:47:40,605 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 345 places, 392 transitions, 874 flow [2023-08-04 09:47:40,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 345 places, 392 transitions, 874 flow [2023-08-04 09:47:41,230 INFO L124 PetriNetUnfolderBase]: 1051/5615 cut-off events. [2023-08-04 09:47:41,230 INFO L125 PetriNetUnfolderBase]: For 602/602 co-relation queries the response was YES. [2023-08-04 09:47:41,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6289 conditions, 5615 events. 1051/5615 cut-off events. For 602/602 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 47513 event pairs, 11 based on Foata normal form. 0/4808 useless extension candidates. Maximal degree in co-relation 3274. Up to 192 conditions per place. [2023-08-04 09:47:41,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 28788 [2023-08-04 09:47:49,162 INFO L134 LiptonReduction]: Checked pairs total: 83034 [2023-08-04 09:47:49,162 INFO L136 LiptonReduction]: Total number of compositions: 361 [2023-08-04 09:47:49,163 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:47:49,164 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;@295a3514, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:47:49,164 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:47:49,167 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:47:49,167 INFO L124 PetriNetUnfolderBase]: 7/52 cut-off events. [2023-08-04 09:47:49,167 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 09:47:49,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:49,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:47:49,167 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:49,167 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:49,167 INFO L85 PathProgramCache]: Analyzing trace with hash -91499170, now seen corresponding path program 1 times [2023-08-04 09:47:49,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:49,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093351019] [2023-08-04 09:47:49,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:49,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:49,231 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 09:47:49,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:49,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093351019] [2023-08-04 09:47:49,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093351019] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:47:49,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:47:49,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:47:49,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205635934] [2023-08-04 09:47:49,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:47:49,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:47:49,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:47:49,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:47:49,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 753 [2023-08-04 09:47:49,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 102 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 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 09:47:49,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:49,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 753 [2023-08-04 09:47:49,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand