/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-min-max-inc-dec.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 02:58:35,680 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 02:58:35,741 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 02:58:35,748 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 02:58:35,748 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 02:58:35,749 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 02:58:35,749 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 02:58:35,773 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 02:58:35,773 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 02:58:35,776 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 02:58:35,776 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 02:58:35,777 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 02:58:35,777 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 02:58:35,778 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 02:58:35,778 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 02:58:35,778 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 02:58:35,778 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 02:58:35,779 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 02:58:35,779 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 02:58:35,779 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 02:58:35,779 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 02:58:35,779 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 02:58:35,779 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 02:58:35,780 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 02:58:35,780 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 02:58:35,781 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 02:58:35,781 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 02:58:35,782 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 02:58:35,782 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 02:58:35,782 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 02:58:35,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:58:35,783 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 02:58:35,783 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 02:58:35,783 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 02:58:35,783 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 02:58:35,783 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 02:58:35,783 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 02:58:35,784 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 02:58:35,784 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 02:58:35,784 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 02:58:35,784 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 02:58:35,784 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 02:58:35,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 02:58:36,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 02:58:36,025 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 02:58:36,026 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 02:58:36,026 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 02:58:36,027 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-min-max-inc-dec.wvr_bound2.c [2023-08-04 02:58:37,308 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 02:58:37,474 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 02:58:37,474 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-min-max-inc-dec.wvr_bound2.c [2023-08-04 02:58:37,481 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69cf1ce32/7ed551b42b69467fa81cf7b54d5eccb7/FLAG1f6a02ed4 [2023-08-04 02:58:37,495 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69cf1ce32/7ed551b42b69467fa81cf7b54d5eccb7 [2023-08-04 02:58:37,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 02:58:37,499 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 02:58:37,502 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 02:58:37,502 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 02:58:37,504 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 02:58:37,505 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,505 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d42094 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37, skipping insertion in model container [2023-08-04 02:58:37,505 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,530 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 02:58:37,662 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-min-max-inc-dec.wvr_bound2.c[3676,3689] [2023-08-04 02:58:37,665 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:58:37,671 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 02:58:37,697 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-min-max-inc-dec.wvr_bound2.c[3676,3689] [2023-08-04 02:58:37,700 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 02:58:37,706 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:58:37,706 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 02:58:37,711 INFO L206 MainTranslator]: Completed translation [2023-08-04 02:58:37,711 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37 WrapperNode [2023-08-04 02:58:37,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 02:58:37,712 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 02:58:37,712 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 02:58:37,713 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 02:58:37,724 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,732 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,752 INFO L138 Inliner]: procedures = 27, calls = 75, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 256 [2023-08-04 02:58:37,753 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 02:58:37,753 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 02:58:37,753 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 02:58:37,753 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 02:58:37,759 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,759 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,766 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,766 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,773 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,777 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,783 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 02:58:37,784 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 02:58:37,784 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 02:58:37,784 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 02:58:37,785 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37" (1/1) ... [2023-08-04 02:58:37,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 02:58:37,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 02:58:37,820 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 02:58:37,831 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 02:58:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 02:58:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 02:58:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 02:58:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 02:58:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 02:58:37,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 02:58:37,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 02:58:37,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 02:58:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 02:58:37,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 02:58:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 02:58:37,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 02:58:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 02:58:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-04 02:58:37,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-04 02:58:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 02:58:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 02:58:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 02:58:37,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 02:58:37,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 02:58:37,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 02:58:37,851 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 02:58:37,932 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 02:58:37,934 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 02:58:38,229 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 02:58:38,282 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 02:58:38,282 INFO L302 CfgBuilder]: Removed 15 assume(true) statements. [2023-08-04 02:58:38,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:58:38 BoogieIcfgContainer [2023-08-04 02:58:38,284 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 02:58:38,285 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 02:58:38,286 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 02:58:38,288 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 02:58:38,288 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 02:58:37" (1/3) ... [2023-08-04 02:58:38,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242e7e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:58:38, skipping insertion in model container [2023-08-04 02:58:38,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 02:58:37" (2/3) ... [2023-08-04 02:58:38,289 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@242e7e9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 02:58:38, skipping insertion in model container [2023-08-04 02:58:38,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 02:58:38" (3/3) ... [2023-08-04 02:58:38,290 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-min-max-inc-dec.wvr_bound2.c [2023-08-04 02:58:38,298 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 02:58:38,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 02:58:38,305 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 02:58:38,305 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 02:58:38,454 INFO L144 ThreadInstanceAdder]: Constructed 25 joinOtherThreadTransitions. [2023-08-04 02:58:38,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 275 transitions, 650 flow [2023-08-04 02:58:38,922 INFO L124 PetriNetUnfolderBase]: 689/3414 cut-off events. [2023-08-04 02:58:38,922 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2023-08-04 02:58:38,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 3414 events. 689/3414 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 28291 event pairs, 0 based on Foata normal form. 0/2871 useless extension candidates. Maximal degree in co-relation 1893. Up to 81 conditions per place. [2023-08-04 02:58:38,951 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 275 transitions, 650 flow [2023-08-04 02:58:38,977 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 275 transitions, 650 flow [2023-08-04 02:58:38,980 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:58:38,989 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 275 transitions, 650 flow [2023-08-04 02:58:38,992 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 275 transitions, 650 flow [2023-08-04 02:58:38,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 275 transitions, 650 flow [2023-08-04 02:58:39,313 INFO L124 PetriNetUnfolderBase]: 689/3414 cut-off events. [2023-08-04 02:58:39,313 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2023-08-04 02:58:39,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 3414 events. 689/3414 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 28291 event pairs, 0 based on Foata normal form. 0/2871 useless extension candidates. Maximal degree in co-relation 1893. Up to 81 conditions per place. [2023-08-04 02:58:39,382 INFO L119 LiptonReduction]: Number of co-enabled transitions 14210 [2023-08-04 02:58:45,549 INFO L134 LiptonReduction]: Checked pairs total: 42653 [2023-08-04 02:58:45,549 INFO L136 LiptonReduction]: Total number of compositions: 221 [2023-08-04 02:58:45,581 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:58:45,587 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;@7f1ead66, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:58:45,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-04 02:58:45,592 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:58:45,592 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 02:58:45,592 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 02:58:45,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:58:45,593 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-04 02:58:45,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-04 02:58:45,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:58:45,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2011688893, now seen corresponding path program 1 times [2023-08-04 02:58:45,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:58:45,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940125280] [2023-08-04 02:58:45,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:58:45,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:58:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:58:45,928 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 02:58:45,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:58:45,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940125280] [2023-08-04 02:58:45,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940125280] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:58:45,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:58:45,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:58:45,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046600383] [2023-08-04 02:58:45,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:58:45,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:58:45,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:58:45,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:58:45,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:58:45,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 496 [2023-08-04 02:58:45,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 89 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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 02:58:45,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:58:45,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 496 [2023-08-04 02:58:45,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 02:58:53,273 INFO L124 PetriNetUnfolderBase]: 92207/119827 cut-off events. [2023-08-04 02:58:53,275 INFO L125 PetriNetUnfolderBase]: For 9201/9201 co-relation queries the response was YES. [2023-08-04 02:58:53,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243506 conditions, 119827 events. 92207/119827 cut-off events. For 9201/9201 co-relation queries the response was YES. Maximal size of possible extension queue 3254. Compared 714740 event pairs, 54285 based on Foata normal form. 0/81552 useless extension candidates. Maximal degree in co-relation 195706. Up to 114571 conditions per place. [2023-08-04 02:58:53,707 INFO L140 encePairwiseOnDemand]: 492/496 looper letters, 34 selfloop transitions, 2 changer transitions 46/89 dead transitions. [2023-08-04 02:58:53,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 89 transitions, 432 flow [2023-08-04 02:58:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 02:58:53,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 02:58:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 724 transitions. [2023-08-04 02:58:53,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48655913978494625 [2023-08-04 02:58:53,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 724 transitions. [2023-08-04 02:58:53,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 724 transitions. [2023-08-04 02:58:53,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 02:58:53,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 724 transitions. [2023-08-04 02:58:53,730 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 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 02:58:53,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 02:58:53,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 496.0) internal successors, (1984), 4 states have internal predecessors, (1984), 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 02:58:53,738 INFO L175 Difference]: Start difference. First operand has 70 places, 89 transitions, 278 flow. Second operand 3 states and 724 transitions. [2023-08-04 02:58:53,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 89 transitions, 432 flow [2023-08-04 02:58:53,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 89 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 02:58:53,773 INFO L231 Difference]: Finished difference. Result has 72 places, 43 transitions, 121 flow [2023-08-04 02:58:53,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=496, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=72, PETRI_TRANSITIONS=43} [2023-08-04 02:58:53,778 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 2 predicate places. [2023-08-04 02:58:53,778 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 43 transitions, 121 flow [2023-08-04 02:58:53,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.66666666666666) internal successors, (650), 3 states have internal predecessors, (650), 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 02:58:53,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:58:53,779 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 02:58:53,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 02:58:53,780 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-04 02:58:53,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:58:53,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1110511523, now seen corresponding path program 1 times [2023-08-04 02:58:53,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:58:53,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295016612] [2023-08-04 02:58:53,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:58:53,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:58:53,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:58:53,849 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 02:58:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 02:58:53,895 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 02:58:53,895 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 02:58:53,896 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-04 02:58:53,897 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2023-08-04 02:58:53,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-04 02:58:53,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2023-08-04 02:58:53,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-08-04 02:58:53,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 02:58:53,898 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 02:58:53,900 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-04 02:58:53,900 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 02:58:53,900 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 02:58:53,949 INFO L144 ThreadInstanceAdder]: Constructed 50 joinOtherThreadTransitions. [2023-08-04 02:58:53,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 352 transitions, 914 flow [2023-08-04 02:59:06,568 INFO L124 PetriNetUnfolderBase]: 31491/98647 cut-off events. [2023-08-04 02:59:06,568 INFO L125 PetriNetUnfolderBase]: For 25842/25842 co-relation queries the response was YES. [2023-08-04 02:59:08,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125105 conditions, 98647 events. 31491/98647 cut-off events. For 25842/25842 co-relation queries the response was YES. Maximal size of possible extension queue 1436. Compared 1270684 event pairs, 1497 based on Foata normal form. 0/85468 useless extension candidates. Maximal degree in co-relation 61048. Up to 5120 conditions per place. [2023-08-04 02:59:08,158 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 352 transitions, 914 flow [2023-08-04 02:59:08,951 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 291 places, 352 transitions, 914 flow [2023-08-04 02:59:08,952 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 02:59:08,952 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 291 places, 352 transitions, 914 flow [2023-08-04 02:59:08,952 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 291 places, 352 transitions, 914 flow [2023-08-04 02:59:08,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 352 transitions, 914 flow [2023-08-04 02:59:20,931 INFO L124 PetriNetUnfolderBase]: 31491/98647 cut-off events. [2023-08-04 02:59:20,931 INFO L125 PetriNetUnfolderBase]: For 25842/25842 co-relation queries the response was YES. [2023-08-04 02:59:22,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125105 conditions, 98647 events. 31491/98647 cut-off events. For 25842/25842 co-relation queries the response was YES. Maximal size of possible extension queue 1436. Compared 1270684 event pairs, 1497 based on Foata normal form. 0/85468 useless extension candidates. Maximal degree in co-relation 61048. Up to 5120 conditions per place. [2023-08-04 02:59:24,755 INFO L119 LiptonReduction]: Number of co-enabled transitions 38088 [2023-08-04 02:59:32,445 INFO L134 LiptonReduction]: Checked pairs total: 161656 [2023-08-04 02:59:32,445 INFO L136 LiptonReduction]: Total number of compositions: 252 [2023-08-04 02:59:32,447 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 02:59:32,448 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;@7f1ead66, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 02:59:32,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-04 02:59:32,456 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 02:59:32,456 INFO L124 PetriNetUnfolderBase]: 19/166 cut-off events. [2023-08-04 02:59:32,456 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 02:59:32,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 02:59:32,456 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2023-08-04 02:59:32,456 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-04 02:59:32,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 02:59:32,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2097031423, now seen corresponding path program 1 times [2023-08-04 02:59:32,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 02:59:32,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120800884] [2023-08-04 02:59:32,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 02:59:32,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 02:59:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 02:59:32,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 02:59:32,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 02:59:32,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120800884] [2023-08-04 02:59:32,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120800884] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 02:59:32,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 02:59:32,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 02:59:32,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57479825] [2023-08-04 02:59:32,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 02:59:32,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 02:59:32,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 02:59:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 02:59:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 02:59:32,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 604 [2023-08-04 02:59:32,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 139 transitions, 488 flow. Second operand has 3 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 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 02:59:32,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 02:59:32,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 604 [2023-08-04 02:59:32,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand