./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:44:29,965 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:44:30,026 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:44:30,030 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:44:30,033 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:44:30,059 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:44:30,060 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:44:30,060 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:44:30,061 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:44:30,061 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:44:30,061 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:44:30,062 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:44:30,063 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:44:30,064 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:44:30,065 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:44:30,065 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:44:30,065 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:44:30,065 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:44:30,066 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:44:30,066 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:44:30,066 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:44:30,068 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:44:30,069 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:44:30,069 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:44:30,069 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:44:30,069 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:44:30,070 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:44:30,070 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:44:30,070 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:44:30,070 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:44:30,070 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:44:30,071 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:44:30,071 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:44:30,071 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:44:30,072 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:44:30,072 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:44:30,072 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:44:30,072 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:44:30,072 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:44:30,073 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:44:30,073 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:44:30,073 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:44:30,073 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6897befed0dbbae24492a1e82d50fcd0be6b3857b241d882a904d02a513d7a6d [2024-11-09 10:44:30,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:44:30,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:44:30,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:44:30,297 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:44:30,298 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:44:30,299 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-11-09 10:44:31,588 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:44:31,766 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:44:31,767 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2024-11-09 10:44:31,773 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97b3a61b2/248eca57784a4ca5bf8fab96916df000/FLAG10fe4e052 [2024-11-09 10:44:32,186 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97b3a61b2/248eca57784a4ca5bf8fab96916df000 [2024-11-09 10:44:32,188 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:44:32,190 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:44:32,191 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:44:32,191 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:44:32,199 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:44:32,200 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,201 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@518dca9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32, skipping insertion in model container [2024-11-09 10:44:32,201 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,218 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:44:32,417 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:44:32,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:44:32,437 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:44:32,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:44:32,473 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:44:32,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32 WrapperNode [2024-11-09 10:44:32,474 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:44:32,475 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:44:32,475 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:44:32,475 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:44:32,482 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,489 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,510 INFO L138 Inliner]: procedures = 22, calls = 20, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 107 [2024-11-09 10:44:32,510 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:44:32,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:44:32,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:44:32,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:44:32,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,523 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,535 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-09 10:44:32,535 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,540 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,545 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,547 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,548 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,555 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:44:32,559 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:44:32,560 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:44:32,560 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:44:32,561 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (1/1) ... [2024-11-09 10:44:32,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:44:32,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:32,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:44:32,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:44:32,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:44:32,655 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:44:32,655 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:44:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:44:32,656 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:44:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:44:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:44:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:44:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:44:32,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:44:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:44:32,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:44:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:44:32,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:44:32,659 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:44:32,758 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:44:32,760 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:44:33,035 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:44:33,035 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:44:33,185 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:44:33,185 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-09 10:44:33,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:33 BoogieIcfgContainer [2024-11-09 10:44:33,186 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:44:33,187 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:44:33,187 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:44:33,190 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:44:33,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:44:32" (1/3) ... [2024-11-09 10:44:33,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b4e5b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:33, skipping insertion in model container [2024-11-09 10:44:33,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:44:32" (2/3) ... [2024-11-09 10:44:33,192 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54b4e5b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:44:33, skipping insertion in model container [2024-11-09 10:44:33,194 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:44:33" (3/3) ... [2024-11-09 10:44:33,195 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2024-11-09 10:44:33,210 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:44:33,211 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-09 10:44:33,211 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:44:33,261 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 10:44:33,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 48 transitions, 110 flow [2024-11-09 10:44:33,312 INFO L124 PetriNetUnfolderBase]: 6/46 cut-off events. [2024-11-09 10:44:33,312 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:44:33,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 46 events. 6/46 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 107 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-09 10:44:33,315 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 48 transitions, 110 flow [2024-11-09 10:44:33,317 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 45 transitions, 102 flow [2024-11-09 10:44:33,325 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:44:33,332 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@5e34e7f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:44:33,333 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-09 10:44:33,336 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:44:33,336 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:44:33,336 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:44:33,336 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:33,337 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:44:33,337 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:33,342 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:33,343 INFO L85 PathProgramCache]: Analyzing trace with hash 467441, now seen corresponding path program 1 times [2024-11-09 10:44:33,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:33,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747757289] [2024-11-09 10:44:33,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:33,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:33,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:33,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747757289] [2024-11-09 10:44:33,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747757289] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:33,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:33,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:44:33,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692679087] [2024-11-09 10:44:33,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:33,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:44:33,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:33,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:44:33,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:44:33,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-09 10:44:33,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-09 10:44:33,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:33,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-09 10:44:33,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:33,775 INFO L124 PetriNetUnfolderBase]: 101/218 cut-off events. [2024-11-09 10:44:33,777 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-09 10:44:33,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 385 conditions, 218 events. 101/218 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 809 event pairs, 35 based on Foata normal form. 1/132 useless extension candidates. Maximal degree in co-relation 329. Up to 143 conditions per place. [2024-11-09 10:44:33,783 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 20 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-11-09 10:44:33,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 41 transitions, 138 flow [2024-11-09 10:44:33,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:44:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:44:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-11-09 10:44:33,795 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6319444444444444 [2024-11-09 10:44:33,797 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 102 flow. Second operand 3 states and 91 transitions. [2024-11-09 10:44:33,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 41 transitions, 138 flow [2024-11-09 10:44:33,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 130 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:44:33,804 INFO L231 Difference]: Finished difference. Result has 40 places, 41 transitions, 90 flow [2024-11-09 10:44:33,805 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=40, PETRI_TRANSITIONS=41} [2024-11-09 10:44:33,810 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -6 predicate places. [2024-11-09 10:44:33,810 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 41 transitions, 90 flow [2024-11-09 10:44:33,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 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) [2024-11-09 10:44:33,810 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:33,810 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:44:33,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:44:33,811 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:33,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:33,814 INFO L85 PathProgramCache]: Analyzing trace with hash 467442, now seen corresponding path program 1 times [2024-11-09 10:44:33,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:33,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125800523] [2024-11-09 10:44:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:33,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:34,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:34,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125800523] [2024-11-09 10:44:34,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125800523] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:34,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:34,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:44:34,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450283405] [2024-11-09 10:44:34,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:34,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:44:34,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:44:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:44:34,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-09 10:44:34,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 41 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-11-09 10:44:34,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:34,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-09 10:44:34,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:34,275 INFO L124 PetriNetUnfolderBase]: 102/221 cut-off events. [2024-11-09 10:44:34,275 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 10:44:34,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 221 events. 102/221 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 809 event pairs, 35 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 355. Up to 152 conditions per place. [2024-11-09 10:44:34,278 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 23 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-11-09 10:44:34,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 44 transitions, 150 flow [2024-11-09 10:44:34,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:44:34,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:44:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-09 10:44:34,280 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-11-09 10:44:34,280 INFO L175 Difference]: Start difference. First operand has 40 places, 41 transitions, 90 flow. Second operand 4 states and 116 transitions. [2024-11-09 10:44:34,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 44 transitions, 150 flow [2024-11-09 10:44:34,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 44 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:44:34,282 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 113 flow [2024-11-09 10:44:34,283 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=113, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2024-11-09 10:44:34,284 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2024-11-09 10:44:34,285 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 113 flow [2024-11-09 10:44:34,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 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) [2024-11-09 10:44:34,285 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:34,285 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:44:34,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:44:34,286 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:34,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:34,288 INFO L85 PathProgramCache]: Analyzing trace with hash 14491672, now seen corresponding path program 1 times [2024-11-09 10:44:34,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:34,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160451253] [2024-11-09 10:44:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:34,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:34,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:34,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:34,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160451253] [2024-11-09 10:44:34,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160451253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:34,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:34,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:44:34,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546098007] [2024-11-09 10:44:34,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:34,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:44:34,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:34,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:44:34,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:44:34,539 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-09 10:44:34,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 113 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 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) [2024-11-09 10:44:34,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:34,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-09 10:44:34,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:34,662 INFO L124 PetriNetUnfolderBase]: 103/224 cut-off events. [2024-11-09 10:44:34,663 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-09 10:44:34,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 224 events. 103/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 806 event pairs, 35 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 376. Up to 151 conditions per place. [2024-11-09 10:44:34,667 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 23 selfloop transitions, 7 changer transitions 0/47 dead transitions. [2024-11-09 10:44:34,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 179 flow [2024-11-09 10:44:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:34,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-11-09 10:44:34,670 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-11-09 10:44:34,670 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 113 flow. Second operand 5 states and 141 transitions. [2024-11-09 10:44:34,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 179 flow [2024-11-09 10:44:34,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 176 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:44:34,672 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 147 flow [2024-11-09 10:44:34,672 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2024-11-09 10:44:34,673 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2024-11-09 10:44:34,673 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 147 flow [2024-11-09 10:44:34,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 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) [2024-11-09 10:44:34,673 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:34,673 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:44:34,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:44:34,674 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:34,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:34,674 INFO L85 PathProgramCache]: Analyzing trace with hash 449225612, now seen corresponding path program 1 times [2024-11-09 10:44:34,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:34,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917264796] [2024-11-09 10:44:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:34,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:34,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:34,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:34,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917264796] [2024-11-09 10:44:34,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917264796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:44:34,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248356988] [2024-11-09 10:44:34,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:34,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:34,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:34,870 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) [2024-11-09 10:44:34,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:44:34,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:34,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:44:34,929 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:44:34,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:44:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:35,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:44:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:35,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248356988] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:44:35,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:44:35,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:44:35,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109783655] [2024-11-09 10:44:35,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:44:35,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:44:35,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:35,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:44:35,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:44:35,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-09 10:44:35,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 147 flow. Second operand has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 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) [2024-11-09 10:44:35,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:35,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-09 10:44:35,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:35,637 INFO L124 PetriNetUnfolderBase]: 103/223 cut-off events. [2024-11-09 10:44:35,638 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:44:35,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 223 events. 103/223 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 809 event pairs, 35 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 386. Up to 151 conditions per place. [2024-11-09 10:44:35,641 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 22 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2024-11-09 10:44:35,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 46 transitions, 201 flow [2024-11-09 10:44:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:44:35,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:44:35,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-11-09 10:44:35,643 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-11-09 10:44:35,643 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 147 flow. Second operand 6 states and 159 transitions. [2024-11-09 10:44:35,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 46 transitions, 201 flow [2024-11-09 10:44:35,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 46 transitions, 200 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:44:35,645 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 156 flow [2024-11-09 10:44:35,645 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-11-09 10:44:35,646 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2024-11-09 10:44:35,646 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 156 flow [2024-11-09 10:44:35,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 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) [2024-11-09 10:44:35,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:35,648 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 10:44:35,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:44:35,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:35,849 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:35,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:35,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1041609111, now seen corresponding path program 1 times [2024-11-09 10:44:35,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:35,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509651223] [2024-11-09 10:44:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:35,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:36,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:36,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509651223] [2024-11-09 10:44:36,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509651223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:44:36,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032143531] [2024-11-09 10:44:36,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:36,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:36,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:36,059 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) [2024-11-09 10:44:36,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:44:36,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:36,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:44:36,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:44:36,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:44:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:36,229 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:44:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:36,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032143531] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:44:36,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:44:36,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:44:36,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475382109] [2024-11-09 10:44:36,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:44:36,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:44:36,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:36,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:44:36,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:44:36,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-09 10:44:36,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 156 flow. Second operand has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 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) [2024-11-09 10:44:36,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:36,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-09 10:44:36,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:36,964 INFO L124 PetriNetUnfolderBase]: 105/228 cut-off events. [2024-11-09 10:44:36,965 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-09 10:44:36,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 228 events. 105/228 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 839 event pairs, 35 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 394. Up to 144 conditions per place. [2024-11-09 10:44:36,967 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 16 selfloop transitions, 18 changer transitions 0/51 dead transitions. [2024-11-09 10:44:36,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 51 transitions, 253 flow [2024-11-09 10:44:36,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:44:36,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:44:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-11-09 10:44:36,968 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-09 10:44:36,968 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 156 flow. Second operand 9 states and 234 transitions. [2024-11-09 10:44:36,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 51 transitions, 253 flow [2024-11-09 10:44:36,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 206 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-09 10:44:36,970 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 174 flow [2024-11-09 10:44:36,970 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=174, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2024-11-09 10:44:36,971 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 4 predicate places. [2024-11-09 10:44:36,971 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 174 flow [2024-11-09 10:44:36,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 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) [2024-11-09 10:44:36,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:36,972 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:36,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:44:37,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:37,173 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:37,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:37,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2067205011, now seen corresponding path program 1 times [2024-11-09 10:44:37,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:37,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964365587] [2024-11-09 10:44:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:37,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:37,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:37,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:37,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964365587] [2024-11-09 10:44:37,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964365587] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:37,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:37,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:44:37,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803532567] [2024-11-09 10:44:37,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:37,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:44:37,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:37,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:44:37,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:44:37,223 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-09 10:44:37,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-11-09 10:44:37,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:37,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-09 10:44:37,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:37,299 INFO L124 PetriNetUnfolderBase]: 165/384 cut-off events. [2024-11-09 10:44:37,299 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:44:37,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 384 events. 165/384 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1806 event pairs, 71 based on Foata normal form. 0/243 useless extension candidates. Maximal degree in co-relation 421. Up to 175 conditions per place. [2024-11-09 10:44:37,301 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 52 selfloop transitions, 5 changer transitions 0/73 dead transitions. [2024-11-09 10:44:37,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 73 transitions, 374 flow [2024-11-09 10:44:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:37,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:37,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-11-09 10:44:37,303 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6708333333333333 [2024-11-09 10:44:37,303 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 174 flow. Second operand 5 states and 161 transitions. [2024-11-09 10:44:37,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 73 transitions, 374 flow [2024-11-09 10:44:37,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 73 transitions, 321 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-09 10:44:37,305 INFO L231 Difference]: Finished difference. Result has 51 places, 53 transitions, 170 flow [2024-11-09 10:44:37,305 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=51, PETRI_TRANSITIONS=53} [2024-11-09 10:44:37,305 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 5 predicate places. [2024-11-09 10:44:37,306 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 53 transitions, 170 flow [2024-11-09 10:44:37,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 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) [2024-11-09 10:44:37,306 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:37,306 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:37,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:44:37,306 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:37,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:37,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1247418631, now seen corresponding path program 1 times [2024-11-09 10:44:37,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:37,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161475508] [2024-11-09 10:44:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:37,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:37,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:37,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:37,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161475508] [2024-11-09 10:44:37,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161475508] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:37,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:37,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:44:37,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844019540] [2024-11-09 10:44:37,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:37,351 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:44:37,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:37,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:44:37,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:44:37,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-09 10:44:37,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 53 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-11-09 10:44:37,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:37,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-09 10:44:37,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:37,474 INFO L124 PetriNetUnfolderBase]: 263/630 cut-off events. [2024-11-09 10:44:37,474 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-09 10:44:37,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1144 conditions, 630 events. 263/630 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3542 event pairs, 123 based on Foata normal form. 9/432 useless extension candidates. Maximal degree in co-relation 672. Up to 263 conditions per place. [2024-11-09 10:44:37,477 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 42 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-11-09 10:44:37,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 300 flow [2024-11-09 10:44:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:37,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:37,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-11-09 10:44:37,479 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-09 10:44:37,479 INFO L175 Difference]: Start difference. First operand has 51 places, 53 transitions, 170 flow. Second operand 5 states and 155 transitions. [2024-11-09 10:44:37,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 300 flow [2024-11-09 10:44:37,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 295 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:44:37,481 INFO L231 Difference]: Finished difference. Result has 54 places, 53 transitions, 185 flow [2024-11-09 10:44:37,481 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=54, PETRI_TRANSITIONS=53} [2024-11-09 10:44:37,482 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 8 predicate places. [2024-11-09 10:44:37,482 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 53 transitions, 185 flow [2024-11-09 10:44:37,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 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) [2024-11-09 10:44:37,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:37,482 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:37,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:44:37,482 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:37,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1979191576, now seen corresponding path program 1 times [2024-11-09 10:44:37,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:37,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979124503] [2024-11-09 10:44:37,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:37,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:37,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:37,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:37,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979124503] [2024-11-09 10:44:37,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979124503] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:37,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:37,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:44:37,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999748621] [2024-11-09 10:44:37,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:37,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:44:37,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:37,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:44:37,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:44:37,556 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-09 10:44:37,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 53 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-09 10:44:37,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:37,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-09 10:44:37,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:37,658 INFO L124 PetriNetUnfolderBase]: 289/658 cut-off events. [2024-11-09 10:44:37,658 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-09 10:44:37,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1243 conditions, 658 events. 289/658 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3683 event pairs, 162 based on Foata normal form. 0/524 useless extension candidates. Maximal degree in co-relation 519. Up to 475 conditions per place. [2024-11-09 10:44:37,662 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 33 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2024-11-09 10:44:37,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 257 flow [2024-11-09 10:44:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:44:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:44:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-09 10:44:37,663 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-11-09 10:44:37,663 INFO L175 Difference]: Start difference. First operand has 54 places, 53 transitions, 185 flow. Second operand 4 states and 98 transitions. [2024-11-09 10:44:37,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 257 flow [2024-11-09 10:44:37,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 250 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:44:37,670 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 184 flow [2024-11-09 10:44:37,670 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-09 10:44:37,671 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 7 predicate places. [2024-11-09 10:44:37,671 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 184 flow [2024-11-09 10:44:37,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-09 10:44:37,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:37,671 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:37,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:44:37,672 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:37,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1979191577, now seen corresponding path program 1 times [2024-11-09 10:44:37,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:37,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813439934] [2024-11-09 10:44:37,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:37,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:37,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:37,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:44:37,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:37,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813439934] [2024-11-09 10:44:37,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813439934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:37,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:37,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:44:37,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791947952] [2024-11-09 10:44:37,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:37,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:44:37,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:37,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:44:37,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:44:37,756 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-09 10:44:37,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-09 10:44:37,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:37,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-09 10:44:37,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:37,833 INFO L124 PetriNetUnfolderBase]: 215/441 cut-off events. [2024-11-09 10:44:37,833 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-09 10:44:37,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 901 conditions, 441 events. 215/441 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2141 event pairs, 124 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 482. Up to 274 conditions per place. [2024-11-09 10:44:37,835 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 50 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-11-09 10:44:37,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 69 transitions, 352 flow [2024-11-09 10:44:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 159 transitions. [2024-11-09 10:44:37,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-11-09 10:44:37,836 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 184 flow. Second operand 5 states and 159 transitions. [2024-11-09 10:44:37,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 69 transitions, 352 flow [2024-11-09 10:44:37,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 344 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:44:37,838 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 192 flow [2024-11-09 10:44:37,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-11-09 10:44:37,839 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2024-11-09 10:44:37,839 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 192 flow [2024-11-09 10:44:37,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-09 10:44:37,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:37,840 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:37,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:44:37,840 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:37,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:37,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2071010136, now seen corresponding path program 1 times [2024-11-09 10:44:37,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:37,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525896480] [2024-11-09 10:44:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:37,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:37,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:37,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525896480] [2024-11-09 10:44:37,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525896480] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:37,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:37,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:44:37,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743084079] [2024-11-09 10:44:37,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:37,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:44:37,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:37,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:44:37,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:44:37,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-09 10:44:37,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2024-11-09 10:44:37,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:37,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-09 10:44:37,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:37,999 INFO L124 PetriNetUnfolderBase]: 227/522 cut-off events. [2024-11-09 10:44:37,999 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-09 10:44:38,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 522 events. 227/522 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2690 event pairs, 138 based on Foata normal form. 0/440 useless extension candidates. Maximal degree in co-relation 766. Up to 389 conditions per place. [2024-11-09 10:44:38,003 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 30 selfloop transitions, 8 changer transitions 0/49 dead transitions. [2024-11-09 10:44:38,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 49 transitions, 264 flow [2024-11-09 10:44:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:38,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:38,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-11-09 10:44:38,004 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-11-09 10:44:38,004 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 192 flow. Second operand 5 states and 116 transitions. [2024-11-09 10:44:38,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 49 transitions, 264 flow [2024-11-09 10:44:38,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 256 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:44:38,006 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 196 flow [2024-11-09 10:44:38,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-09 10:44:38,006 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2024-11-09 10:44:38,006 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 196 flow [2024-11-09 10:44:38,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 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) [2024-11-09 10:44:38,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:38,007 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:38,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:44:38,007 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:38,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:38,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2071010135, now seen corresponding path program 1 times [2024-11-09 10:44:38,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:38,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871611337] [2024-11-09 10:44:38,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:38,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:38,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:38,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871611337] [2024-11-09 10:44:38,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871611337] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:44:38,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022669567] [2024-11-09 10:44:38,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:38,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:38,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:38,161 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) [2024-11-09 10:44:38,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:44:38,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:38,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:44:38,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:44:38,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:44:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:44:38,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:44:38,283 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:44:38,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:44:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:38,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:44:38,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-11-09 10:44:38,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:38,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022669567] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:44:38,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:44:38,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:44:38,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078988102] [2024-11-09 10:44:38,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:44:38,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:44:38,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:38,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:44:38,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:44:38,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:44:38,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 196 flow. Second operand has 11 states, 11 states have (on average 22.454545454545453) internal successors, (247), 11 states have internal predecessors, (247), 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) [2024-11-09 10:44:38,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:38,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:44:38,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:39,162 INFO L124 PetriNetUnfolderBase]: 325/708 cut-off events. [2024-11-09 10:44:39,163 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-09 10:44:39,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1382 conditions, 708 events. 325/708 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3671 event pairs, 147 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 858. Up to 233 conditions per place. [2024-11-09 10:44:39,167 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 57 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-11-09 10:44:39,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 83 transitions, 435 flow [2024-11-09 10:44:39,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:44:39,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:44:39,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-11-09 10:44:39,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-09 10:44:39,169 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 196 flow. Second operand 8 states and 224 transitions. [2024-11-09 10:44:39,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 83 transitions, 435 flow [2024-11-09 10:44:39,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 83 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:44:39,171 INFO L231 Difference]: Finished difference. Result has 61 places, 53 transitions, 245 flow [2024-11-09 10:44:39,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=245, PETRI_PLACES=61, PETRI_TRANSITIONS=53} [2024-11-09 10:44:39,172 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 15 predicate places. [2024-11-09 10:44:39,172 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 245 flow [2024-11-09 10:44:39,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.454545454545453) internal successors, (247), 11 states have internal predecessors, (247), 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) [2024-11-09 10:44:39,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:39,173 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:39,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-09 10:44:39,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:39,378 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:39,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:39,378 INFO L85 PathProgramCache]: Analyzing trace with hash 466777907, now seen corresponding path program 1 times [2024-11-09 10:44:39,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:39,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011756875] [2024-11-09 10:44:39,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:39,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:39,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:39,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011756875] [2024-11-09 10:44:39,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011756875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:44:39,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:44:39,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:44:39,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475053086] [2024-11-09 10:44:39,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:44:39,460 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:44:39,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:39,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:44:39,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:44:39,484 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-09 10:44:39,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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) [2024-11-09 10:44:39,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:39,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-09 10:44:39,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:39,581 INFO L124 PetriNetUnfolderBase]: 361/779 cut-off events. [2024-11-09 10:44:39,581 INFO L125 PetriNetUnfolderBase]: For 201/215 co-relation queries the response was YES. [2024-11-09 10:44:39,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1624 conditions, 779 events. 361/779 cut-off events. For 201/215 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4063 event pairs, 162 based on Foata normal form. 5/667 useless extension candidates. Maximal degree in co-relation 1188. Up to 305 conditions per place. [2024-11-09 10:44:39,585 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 56 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-11-09 10:44:39,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 78 transitions, 440 flow [2024-11-09 10:44:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:44:39,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:44:39,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-11-09 10:44:39,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-11-09 10:44:39,587 INFO L175 Difference]: Start difference. First operand has 61 places, 53 transitions, 245 flow. Second operand 5 states and 166 transitions. [2024-11-09 10:44:39,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 78 transitions, 440 flow [2024-11-09 10:44:39,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 78 transitions, 422 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-09 10:44:39,588 INFO L231 Difference]: Finished difference. Result has 64 places, 54 transitions, 260 flow [2024-11-09 10:44:39,589 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=260, PETRI_PLACES=64, PETRI_TRANSITIONS=54} [2024-11-09 10:44:39,590 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2024-11-09 10:44:39,590 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 54 transitions, 260 flow [2024-11-09 10:44:39,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 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) [2024-11-09 10:44:39,591 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:39,591 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:39,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:44:39,591 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:39,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:39,592 INFO L85 PathProgramCache]: Analyzing trace with hash 223195645, now seen corresponding path program 1 times [2024-11-09 10:44:39,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:39,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830793987] [2024-11-09 10:44:39,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:39,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:39,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:39,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:39,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:39,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830793987] [2024-11-09 10:44:39,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830793987] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:44:39,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122661183] [2024-11-09 10:44:39,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:39,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:39,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:39,739 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) [2024-11-09 10:44:39,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:44:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:39,793 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:44:39,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:44:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:39,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:44:39,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-09 10:44:39,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:39,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122661183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:44:39,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:44:39,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-09 10:44:39,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107806282] [2024-11-09 10:44:39,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:44:39,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:44:39,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:39,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:44:39,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:44:40,146 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-09 10:44:40,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 54 transitions, 260 flow. Second operand has 12 states, 12 states have (on average 23.75) internal successors, (285), 12 states have internal predecessors, (285), 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) [2024-11-09 10:44:40,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:40,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-09 10:44:40,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:40,389 INFO L124 PetriNetUnfolderBase]: 375/764 cut-off events. [2024-11-09 10:44:40,389 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2024-11-09 10:44:40,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1737 conditions, 764 events. 375/764 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3734 event pairs, 130 based on Foata normal form. 0/692 useless extension candidates. Maximal degree in co-relation 1272. Up to 226 conditions per place. [2024-11-09 10:44:40,394 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 65 selfloop transitions, 15 changer transitions 0/92 dead transitions. [2024-11-09 10:44:40,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 92 transitions, 516 flow [2024-11-09 10:44:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:44:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:44:40,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 222 transitions. [2024-11-09 10:44:40,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-11-09 10:44:40,396 INFO L175 Difference]: Start difference. First operand has 64 places, 54 transitions, 260 flow. Second operand 7 states and 222 transitions. [2024-11-09 10:44:40,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 92 transitions, 516 flow [2024-11-09 10:44:40,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 505 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:44:40,399 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 296 flow [2024-11-09 10:44:40,399 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=296, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2024-11-09 10:44:40,400 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 24 predicate places. [2024-11-09 10:44:40,400 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 296 flow [2024-11-09 10:44:40,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 23.75) internal successors, (285), 12 states have internal predecessors, (285), 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) [2024-11-09 10:44:40,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:40,401 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:40,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:44:40,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:40,602 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:40,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:40,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1677533548, now seen corresponding path program 1 times [2024-11-09 10:44:40,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:40,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722118736] [2024-11-09 10:44:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:40,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:40,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:40,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:40,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722118736] [2024-11-09 10:44:40,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722118736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:44:40,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814853170] [2024-11-09 10:44:40,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:40,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:40,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:40,728 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) [2024-11-09 10:44:40,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:44:40,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:40,782 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:44:40,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:44:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:40,863 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:44:40,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-09 10:44:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:40,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814853170] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:44:40,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:44:40,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-09 10:44:40,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635747183] [2024-11-09 10:44:40,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:44:40,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:44:40,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:40,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:44:40,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:44:41,158 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-09 10:44:41,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 296 flow. Second operand has 12 states, 12 states have (on average 24.25) internal successors, (291), 12 states have internal predecessors, (291), 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) [2024-11-09 10:44:41,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:41,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-09 10:44:41,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:41,370 INFO L124 PetriNetUnfolderBase]: 429/888 cut-off events. [2024-11-09 10:44:41,370 INFO L125 PetriNetUnfolderBase]: For 881/941 co-relation queries the response was YES. [2024-11-09 10:44:41,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2022 conditions, 888 events. 429/888 cut-off events. For 881/941 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4591 event pairs, 162 based on Foata normal form. 0/803 useless extension candidates. Maximal degree in co-relation 1546. Up to 288 conditions per place. [2024-11-09 10:44:41,375 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 61 selfloop transitions, 15 changer transitions 0/89 dead transitions. [2024-11-09 10:44:41,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 89 transitions, 552 flow [2024-11-09 10:44:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:44:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:44:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 218 transitions. [2024-11-09 10:44:41,377 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6488095238095238 [2024-11-09 10:44:41,377 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 296 flow. Second operand 7 states and 218 transitions. [2024-11-09 10:44:41,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 89 transitions, 552 flow [2024-11-09 10:44:41,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 89 transitions, 531 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:44:41,379 INFO L231 Difference]: Finished difference. Result has 75 places, 56 transitions, 322 flow [2024-11-09 10:44:41,379 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=322, PETRI_PLACES=75, PETRI_TRANSITIONS=56} [2024-11-09 10:44:41,380 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 29 predicate places. [2024-11-09 10:44:41,381 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 56 transitions, 322 flow [2024-11-09 10:44:41,381 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 24.25) internal successors, (291), 12 states have internal predecessors, (291), 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) [2024-11-09 10:44:41,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:41,381 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:41,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:44:41,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 10:44:41,582 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:41,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:41,582 INFO L85 PathProgramCache]: Analyzing trace with hash -463932034, now seen corresponding path program 1 times [2024-11-09 10:44:41,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:41,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826418278] [2024-11-09 10:44:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:41,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:41,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:41,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:41,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826418278] [2024-11-09 10:44:41,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826418278] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:44:41,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535273385] [2024-11-09 10:44:41,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:41,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:41,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:41,744 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) [2024-11-09 10:44:41,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:44:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:41,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:44:41,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:44:41,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:44:41,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:44:41,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:44:41,867 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:44:41,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:44:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:41,922 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:44:42,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-11-09 10:44:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:42,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535273385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:44:42,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:44:42,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:44:42,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797230875] [2024-11-09 10:44:42,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:44:42,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:44:42,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:42,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:44:42,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:44:46,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:44:50,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:44:54,278 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:44:58,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-09 10:44:58,389 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-09 10:44:58,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 56 transitions, 322 flow. Second operand has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 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) [2024-11-09 10:44:58,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:58,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-09 10:44:58,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:58,697 INFO L124 PetriNetUnfolderBase]: 429/835 cut-off events. [2024-11-09 10:44:58,697 INFO L125 PetriNetUnfolderBase]: For 901/961 co-relation queries the response was YES. [2024-11-09 10:44:58,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2016 conditions, 835 events. 429/835 cut-off events. For 901/961 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4122 event pairs, 230 based on Foata normal form. 0/778 useless extension candidates. Maximal degree in co-relation 1531. Up to 323 conditions per place. [2024-11-09 10:44:58,703 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 58 selfloop transitions, 15 changer transitions 0/87 dead transitions. [2024-11-09 10:44:58,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 572 flow [2024-11-09 10:44:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:44:58,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:44:58,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-11-09 10:44:58,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2024-11-09 10:44:58,705 INFO L175 Difference]: Start difference. First operand has 75 places, 56 transitions, 322 flow. Second operand 8 states and 190 transitions. [2024-11-09 10:44:58,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 572 flow [2024-11-09 10:44:58,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 87 transitions, 539 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-09 10:44:58,707 INFO L231 Difference]: Finished difference. Result has 80 places, 57 transitions, 336 flow [2024-11-09 10:44:58,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=336, PETRI_PLACES=80, PETRI_TRANSITIONS=57} [2024-11-09 10:44:58,708 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 34 predicate places. [2024-11-09 10:44:58,708 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 57 transitions, 336 flow [2024-11-09 10:44:58,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.0) internal successors, (209), 11 states have internal predecessors, (209), 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) [2024-11-09 10:44:58,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:58,709 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:58,725 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:44:58,909 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 10:44:58,909 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:44:58,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:44:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash 612475950, now seen corresponding path program 1 times [2024-11-09 10:44:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:44:58,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484722027] [2024-11-09 10:44:58,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:58,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:44:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:58,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:58,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:44:58,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484722027] [2024-11-09 10:44:58,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484722027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:44:58,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985471745] [2024-11-09 10:44:58,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:44:58,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:44:58,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:44:58,985 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) [2024-11-09 10:44:58,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:44:59,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:44:59,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:44:59,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:44:59,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:59,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:44:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:44:59,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985471745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:44:59,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:44:59,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2024-11-09 10:44:59,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871539040] [2024-11-09 10:44:59,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:44:59,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:44:59,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:44:59,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:44:59,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:44:59,272 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-09 10:44:59,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 57 transitions, 336 flow. Second operand has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 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) [2024-11-09 10:44:59,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:44:59,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-09 10:44:59,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:44:59,882 INFO L124 PetriNetUnfolderBase]: 1085/2176 cut-off events. [2024-11-09 10:44:59,882 INFO L125 PetriNetUnfolderBase]: For 3132/3345 co-relation queries the response was YES. [2024-11-09 10:44:59,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5474 conditions, 2176 events. 1085/2176 cut-off events. For 3132/3345 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 13912 event pairs, 674 based on Foata normal form. 54/2067 useless extension candidates. Maximal degree in co-relation 2910. Up to 553 conditions per place. [2024-11-09 10:44:59,898 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 158 selfloop transitions, 32 changer transitions 0/206 dead transitions. [2024-11-09 10:44:59,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 206 transitions, 1242 flow [2024-11-09 10:44:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 10:44:59,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-09 10:44:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 806 transitions. [2024-11-09 10:44:59,903 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6219135802469136 [2024-11-09 10:44:59,903 INFO L175 Difference]: Start difference. First operand has 80 places, 57 transitions, 336 flow. Second operand 27 states and 806 transitions. [2024-11-09 10:44:59,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 206 transitions, 1242 flow [2024-11-09 10:44:59,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 206 transitions, 1212 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-09 10:44:59,909 INFO L231 Difference]: Finished difference. Result has 105 places, 70 transitions, 496 flow [2024-11-09 10:44:59,910 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=496, PETRI_PLACES=105, PETRI_TRANSITIONS=70} [2024-11-09 10:44:59,910 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 59 predicate places. [2024-11-09 10:44:59,911 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 70 transitions, 496 flow [2024-11-09 10:44:59,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 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) [2024-11-09 10:44:59,911 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:44:59,911 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:44:59,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:45:00,112 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:00,112 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:00,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:00,113 INFO L85 PathProgramCache]: Analyzing trace with hash 205935513, now seen corresponding path program 1 times [2024-11-09 10:45:00,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:00,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844206335] [2024-11-09 10:45:00,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:00,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:00,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:00,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844206335] [2024-11-09 10:45:00,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844206335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:00,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883488428] [2024-11-09 10:45:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:00,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:00,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:00,185 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) [2024-11-09 10:45:00,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:45:00,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:00,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:45:00,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:00,306 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:00,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:00,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883488428] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:00,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:00,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2024-11-09 10:45:00,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190399118] [2024-11-09 10:45:00,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:00,366 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:45:00,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:45:00,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:45:00,549 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-09 10:45:00,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 70 transitions, 496 flow. Second operand has 15 states, 15 states have (on average 25.6) internal successors, (384), 15 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:00,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:00,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-09 10:45:00,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:01,006 INFO L124 PetriNetUnfolderBase]: 901/1846 cut-off events. [2024-11-09 10:45:01,006 INFO L125 PetriNetUnfolderBase]: For 3446/3672 co-relation queries the response was YES. [2024-11-09 10:45:01,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4720 conditions, 1846 events. 901/1846 cut-off events. For 3446/3672 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11490 event pairs, 413 based on Foata normal form. 42/1797 useless extension candidates. Maximal degree in co-relation 2552. Up to 320 conditions per place. [2024-11-09 10:45:01,017 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 172 selfloop transitions, 29 changer transitions 0/217 dead transitions. [2024-11-09 10:45:01,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 217 transitions, 1341 flow [2024-11-09 10:45:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 10:45:01,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-09 10:45:01,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 800 transitions. [2024-11-09 10:45:01,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6410256410256411 [2024-11-09 10:45:01,020 INFO L175 Difference]: Start difference. First operand has 105 places, 70 transitions, 496 flow. Second operand 26 states and 800 transitions. [2024-11-09 10:45:01,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 217 transitions, 1341 flow [2024-11-09 10:45:01,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 217 transitions, 1318 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:45:01,025 INFO L231 Difference]: Finished difference. Result has 128 places, 76 transitions, 591 flow [2024-11-09 10:45:01,025 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=591, PETRI_PLACES=128, PETRI_TRANSITIONS=76} [2024-11-09 10:45:01,026 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 82 predicate places. [2024-11-09 10:45:01,026 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 76 transitions, 591 flow [2024-11-09 10:45:01,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 25.6) internal successors, (384), 15 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:01,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:01,026 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:01,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:45:01,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 10:45:01,230 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:01,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:01,231 INFO L85 PathProgramCache]: Analyzing trace with hash 251945921, now seen corresponding path program 1 times [2024-11-09 10:45:01,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:01,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773952230] [2024-11-09 10:45:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:01,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:01,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:01,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:01,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773952230] [2024-11-09 10:45:01,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773952230] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:01,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:01,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:45:01,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377192777] [2024-11-09 10:45:01,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:01,300 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:45:01,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:45:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:45:01,312 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 48 [2024-11-09 10:45:01,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 76 transitions, 591 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-11-09 10:45:01,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:01,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 48 [2024-11-09 10:45:01,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:01,460 INFO L124 PetriNetUnfolderBase]: 783/1640 cut-off events. [2024-11-09 10:45:01,461 INFO L125 PetriNetUnfolderBase]: For 4055/4310 co-relation queries the response was YES. [2024-11-09 10:45:01,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4311 conditions, 1640 events. 783/1640 cut-off events. For 4055/4310 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 10035 event pairs, 293 based on Foata normal form. 9/1542 useless extension candidates. Maximal degree in co-relation 2223. Up to 904 conditions per place. [2024-11-09 10:45:01,468 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 56 selfloop transitions, 9 changer transitions 13/95 dead transitions. [2024-11-09 10:45:01,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 95 transitions, 874 flow [2024-11-09 10:45:01,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:45:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:45:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2024-11-09 10:45:01,469 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.75 [2024-11-09 10:45:01,469 INFO L175 Difference]: Start difference. First operand has 128 places, 76 transitions, 591 flow. Second operand 3 states and 108 transitions. [2024-11-09 10:45:01,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 95 transitions, 874 flow [2024-11-09 10:45:01,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 95 transitions, 841 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-11-09 10:45:01,473 INFO L231 Difference]: Finished difference. Result has 121 places, 72 transitions, 563 flow [2024-11-09 10:45:01,474 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=563, PETRI_PLACES=121, PETRI_TRANSITIONS=72} [2024-11-09 10:45:01,474 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 75 predicate places. [2024-11-09 10:45:01,474 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 72 transitions, 563 flow [2024-11-09 10:45:01,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 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) [2024-11-09 10:45:01,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:01,474 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:01,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 10:45:01,475 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:01,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:01,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1015357225, now seen corresponding path program 2 times [2024-11-09 10:45:01,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:01,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781129503] [2024-11-09 10:45:01,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:01,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:01,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:01,658 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:01,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:01,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781129503] [2024-11-09 10:45:01,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781129503] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:01,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146263732] [2024-11-09 10:45:01,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:45:01,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:01,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:01,664 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:01,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:45:01,732 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:45:01,732 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:45:01,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 10:45:01,735 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:01,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:45:01,819 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 10:45:01,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-11-09 10:45:01,834 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:45:01,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:45:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:01,940 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:02,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-11-09 10:45:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:02,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146263732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:02,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:02,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 16 [2024-11-09 10:45:02,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504229266] [2024-11-09 10:45:02,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:02,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:45:02,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:02,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:45:02,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:45:02,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:02,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 72 transitions, 563 flow. Second operand has 18 states, 18 states have (on average 22.166666666666668) internal successors, (399), 18 states have internal predecessors, (399), 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) [2024-11-09 10:45:02,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:02,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:02,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:03,448 INFO L124 PetriNetUnfolderBase]: 1066/2129 cut-off events. [2024-11-09 10:45:03,449 INFO L125 PetriNetUnfolderBase]: For 4982/5116 co-relation queries the response was YES. [2024-11-09 10:45:03,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5844 conditions, 2129 events. 1066/2129 cut-off events. For 4982/5116 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13302 event pairs, 463 based on Foata normal form. 22/1990 useless extension candidates. Maximal degree in co-relation 3757. Up to 672 conditions per place. [2024-11-09 10:45:03,459 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 79 selfloop transitions, 25 changer transitions 0/118 dead transitions. [2024-11-09 10:45:03,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 118 transitions, 966 flow [2024-11-09 10:45:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:45:03,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:45:03,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 305 transitions. [2024-11-09 10:45:03,462 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5776515151515151 [2024-11-09 10:45:03,462 INFO L175 Difference]: Start difference. First operand has 121 places, 72 transitions, 563 flow. Second operand 11 states and 305 transitions. [2024-11-09 10:45:03,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 118 transitions, 966 flow [2024-11-09 10:45:03,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 118 transitions, 883 flow, removed 4 selfloop flow, removed 14 redundant places. [2024-11-09 10:45:03,467 INFO L231 Difference]: Finished difference. Result has 101 places, 76 transitions, 588 flow [2024-11-09 10:45:03,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=588, PETRI_PLACES=101, PETRI_TRANSITIONS=76} [2024-11-09 10:45:03,467 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 55 predicate places. [2024-11-09 10:45:03,467 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 76 transitions, 588 flow [2024-11-09 10:45:03,467 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.166666666666668) internal successors, (399), 18 states have internal predecessors, (399), 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) [2024-11-09 10:45:03,468 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:03,468 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:03,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:45:03,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:03,668 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:03,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:03,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1411303293, now seen corresponding path program 1 times [2024-11-09 10:45:03,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:03,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960322191] [2024-11-09 10:45:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:03,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:03,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:03,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960322191] [2024-11-09 10:45:03,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960322191] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:03,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087453502] [2024-11-09 10:45:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:03,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:03,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:03,914 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:03,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:45:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:03,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:45:03,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:04,106 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:04,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 10:45:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:04,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087453502] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:04,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:04,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-09 10:45:04,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770622453] [2024-11-09 10:45:04,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:04,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 10:45:04,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:04,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 10:45:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-09 10:45:04,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-09 10:45:04,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 76 transitions, 588 flow. Second operand has 19 states, 19 states have (on average 23.894736842105264) internal successors, (454), 19 states have internal predecessors, (454), 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) [2024-11-09 10:45:04,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:04,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-09 10:45:04,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:05,093 INFO L124 PetriNetUnfolderBase]: 1098/2156 cut-off events. [2024-11-09 10:45:05,094 INFO L125 PetriNetUnfolderBase]: For 4737/4939 co-relation queries the response was YES. [2024-11-09 10:45:05,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5970 conditions, 2156 events. 1098/2156 cut-off events. For 4737/4939 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13514 event pairs, 329 based on Foata normal form. 22/2070 useless extension candidates. Maximal degree in co-relation 3211. Up to 462 conditions per place. [2024-11-09 10:45:05,105 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 101 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-11-09 10:45:05,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 142 transitions, 1062 flow [2024-11-09 10:45:05,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:45:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:45:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 323 transitions. [2024-11-09 10:45:05,107 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6729166666666667 [2024-11-09 10:45:05,107 INFO L175 Difference]: Start difference. First operand has 101 places, 76 transitions, 588 flow. Second operand 10 states and 323 transitions. [2024-11-09 10:45:05,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 142 transitions, 1062 flow [2024-11-09 10:45:05,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 142 transitions, 1047 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:45:05,114 INFO L231 Difference]: Finished difference. Result has 109 places, 78 transitions, 654 flow [2024-11-09 10:45:05,116 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=654, PETRI_PLACES=109, PETRI_TRANSITIONS=78} [2024-11-09 10:45:05,116 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 63 predicate places. [2024-11-09 10:45:05,116 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 78 transitions, 654 flow [2024-11-09 10:45:05,117 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 23.894736842105264) internal successors, (454), 19 states have internal predecessors, (454), 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) [2024-11-09 10:45:05,117 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:05,117 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:05,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 10:45:05,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:05,318 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:05,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:05,318 INFO L85 PathProgramCache]: Analyzing trace with hash 827784148, now seen corresponding path program 2 times [2024-11-09 10:45:05,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:05,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119911808] [2024-11-09 10:45:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:05,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:05,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:05,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119911808] [2024-11-09 10:45:05,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119911808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:05,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042791002] [2024-11-09 10:45:05,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:45:05,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:05,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:05,479 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:05,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:45:05,544 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:45:05,544 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:45:05,545 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:45:05,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:05,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:05,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2024-11-09 10:45:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:05,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042791002] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:05,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:05,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-09 10:45:05,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964168440] [2024-11-09 10:45:05,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:05,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 10:45:05,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:05,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 10:45:05,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-09 10:45:06,085 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 48 [2024-11-09 10:45:06,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 78 transitions, 654 flow. Second operand has 19 states, 19 states have (on average 24.210526315789473) internal successors, (460), 19 states have internal predecessors, (460), 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) [2024-11-09 10:45:06,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:06,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 48 [2024-11-09 10:45:06,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:06,516 INFO L124 PetriNetUnfolderBase]: 1477/3003 cut-off events. [2024-11-09 10:45:06,516 INFO L125 PetriNetUnfolderBase]: For 10950/11269 co-relation queries the response was YES. [2024-11-09 10:45:06,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8287 conditions, 3003 events. 1477/3003 cut-off events. For 10950/11269 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 20733 event pairs, 400 based on Foata normal form. 31/2901 useless extension candidates. Maximal degree in co-relation 4656. Up to 626 conditions per place. [2024-11-09 10:45:06,529 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 97 selfloop transitions, 25 changer transitions 0/140 dead transitions. [2024-11-09 10:45:06,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 140 transitions, 1195 flow [2024-11-09 10:45:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:45:06,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:45:06,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 315 transitions. [2024-11-09 10:45:06,530 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-09 10:45:06,531 INFO L175 Difference]: Start difference. First operand has 109 places, 78 transitions, 654 flow. Second operand 10 states and 315 transitions. [2024-11-09 10:45:06,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 140 transitions, 1195 flow [2024-11-09 10:45:06,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 140 transitions, 1156 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-09 10:45:06,539 INFO L231 Difference]: Finished difference. Result has 117 places, 81 transitions, 706 flow [2024-11-09 10:45:06,539 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=619, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=706, PETRI_PLACES=117, PETRI_TRANSITIONS=81} [2024-11-09 10:45:06,539 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 71 predicate places. [2024-11-09 10:45:06,539 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 81 transitions, 706 flow [2024-11-09 10:45:06,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 24.210526315789473) internal successors, (460), 19 states have internal predecessors, (460), 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) [2024-11-09 10:45:06,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:06,540 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:06,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:45:06,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 10:45:06,744 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:06,745 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:06,745 INFO L85 PathProgramCache]: Analyzing trace with hash -108494786, now seen corresponding path program 1 times [2024-11-09 10:45:06,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:06,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076232292] [2024-11-09 10:45:06,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:06,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:06,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:06,948 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:06,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:06,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076232292] [2024-11-09 10:45:06,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076232292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:06,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132992922] [2024-11-09 10:45:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:06,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:06,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:06,950 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:06,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:45:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:07,024 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:45:07,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:07,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:45:07,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:45:07,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 10:45:07,103 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:45:07,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:45:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:07,190 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:07,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-11-09 10:45:07,431 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:07,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132992922] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:07,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:07,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-09 10:45:07,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979389721] [2024-11-09 10:45:07,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:07,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:45:07,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:45:07,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:45:07,952 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:07,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 81 transitions, 706 flow. Second operand has 17 states, 17 states have (on average 22.647058823529413) internal successors, (385), 17 states have internal predecessors, (385), 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) [2024-11-09 10:45:07,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:07,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:07,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:08,488 INFO L124 PetriNetUnfolderBase]: 1508/2932 cut-off events. [2024-11-09 10:45:08,488 INFO L125 PetriNetUnfolderBase]: For 10586/10855 co-relation queries the response was YES. [2024-11-09 10:45:08,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8374 conditions, 2932 events. 1508/2932 cut-off events. For 10586/10855 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19944 event pairs, 712 based on Foata normal form. 31/2838 useless extension candidates. Maximal degree in co-relation 4862. Up to 924 conditions per place. [2024-11-09 10:45:08,506 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 79 selfloop transitions, 25 changer transitions 0/124 dead transitions. [2024-11-09 10:45:08,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 124 transitions, 1157 flow [2024-11-09 10:45:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:45:08,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:45:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 301 transitions. [2024-11-09 10:45:08,508 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5700757575757576 [2024-11-09 10:45:08,508 INFO L175 Difference]: Start difference. First operand has 117 places, 81 transitions, 706 flow. Second operand 11 states and 301 transitions. [2024-11-09 10:45:08,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 124 transitions, 1157 flow [2024-11-09 10:45:08,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 124 transitions, 1122 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-09 10:45:08,517 INFO L231 Difference]: Finished difference. Result has 125 places, 83 transitions, 752 flow [2024-11-09 10:45:08,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=752, PETRI_PLACES=125, PETRI_TRANSITIONS=83} [2024-11-09 10:45:08,518 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 79 predicate places. [2024-11-09 10:45:08,518 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 83 transitions, 752 flow [2024-11-09 10:45:08,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.647058823529413) internal successors, (385), 17 states have internal predecessors, (385), 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) [2024-11-09 10:45:08,518 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:08,518 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:08,531 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 10:45:08,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 10:45:08,723 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:08,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:08,723 INFO L85 PathProgramCache]: Analyzing trace with hash 701931182, now seen corresponding path program 3 times [2024-11-09 10:45:08,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:08,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567964945] [2024-11-09 10:45:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:08,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:08,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:08,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567964945] [2024-11-09 10:45:08,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567964945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:08,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620590280] [2024-11-09 10:45:08,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:45:08,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:08,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:08,816 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:08,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:45:08,884 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:45:08,885 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:45:08,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:45:08,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:08,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:45:08,935 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:45:08,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:45:08,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 10:45:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:45:09,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:09,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2024-11-09 10:45:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:45:09,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620590280] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:09,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:09,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 20 [2024-11-09 10:45:09,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348220906] [2024-11-09 10:45:09,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:09,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 10:45:09,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:09,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 10:45:09,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2024-11-09 10:45:09,713 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-09 10:45:09,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 83 transitions, 752 flow. Second operand has 21 states, 21 states have (on average 20.38095238095238) internal successors, (428), 21 states have internal predecessors, (428), 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) [2024-11-09 10:45:09,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:09,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-09 10:45:09,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:10,700 INFO L124 PetriNetUnfolderBase]: 3235/6454 cut-off events. [2024-11-09 10:45:10,701 INFO L125 PetriNetUnfolderBase]: For 19397/19397 co-relation queries the response was YES. [2024-11-09 10:45:10,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20221 conditions, 6454 events. 3235/6454 cut-off events. For 19397/19397 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 48718 event pairs, 868 based on Foata normal form. 68/6474 useless extension candidates. Maximal degree in co-relation 13207. Up to 968 conditions per place. [2024-11-09 10:45:10,730 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 204 selfloop transitions, 51 changer transitions 0/270 dead transitions. [2024-11-09 10:45:10,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 270 transitions, 2396 flow [2024-11-09 10:45:10,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 10:45:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-09 10:45:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 617 transitions. [2024-11-09 10:45:10,735 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5355902777777778 [2024-11-09 10:45:10,735 INFO L175 Difference]: Start difference. First operand has 125 places, 83 transitions, 752 flow. Second operand 24 states and 617 transitions. [2024-11-09 10:45:10,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 270 transitions, 2396 flow [2024-11-09 10:45:10,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 270 transitions, 2339 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-09 10:45:10,756 INFO L231 Difference]: Finished difference. Result has 143 places, 100 transitions, 1018 flow [2024-11-09 10:45:10,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1018, PETRI_PLACES=143, PETRI_TRANSITIONS=100} [2024-11-09 10:45:10,757 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 97 predicate places. [2024-11-09 10:45:10,757 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 100 transitions, 1018 flow [2024-11-09 10:45:10,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.38095238095238) internal successors, (428), 21 states have internal predecessors, (428), 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) [2024-11-09 10:45:10,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:10,757 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:10,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 10:45:10,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 10:45:10,961 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:10,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:10,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1942606041, now seen corresponding path program 3 times [2024-11-09 10:45:10,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:10,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892601227] [2024-11-09 10:45:10,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:10,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:11,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:45:11,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:11,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892601227] [2024-11-09 10:45:11,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892601227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:11,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121819234] [2024-11-09 10:45:11,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:45:11,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:11,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:11,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:11,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:45:11,134 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:45:11,135 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:45:11,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:45:11,137 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:45:11,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:11,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2024-11-09 10:45:11,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-09 10:45:11,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121819234] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:11,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:11,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-09 10:45:11,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497922219] [2024-11-09 10:45:11,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:11,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:45:11,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:11,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:45:11,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:45:11,732 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:11,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 100 transitions, 1018 flow. Second operand has 20 states, 20 states have (on average 22.5) internal successors, (450), 20 states have internal predecessors, (450), 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) [2024-11-09 10:45:11,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:11,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:11,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:13,014 INFO L124 PetriNetUnfolderBase]: 5543/10969 cut-off events. [2024-11-09 10:45:13,014 INFO L125 PetriNetUnfolderBase]: For 38004/38004 co-relation queries the response was YES. [2024-11-09 10:45:13,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34117 conditions, 10969 events. 5543/10969 cut-off events. For 38004/38004 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 90462 event pairs, 1362 based on Foata normal form. 154/11081 useless extension candidates. Maximal degree in co-relation 21313. Up to 1704 conditions per place. [2024-11-09 10:45:13,068 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 219 selfloop transitions, 49 changer transitions 0/285 dead transitions. [2024-11-09 10:45:13,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 285 transitions, 3001 flow [2024-11-09 10:45:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 10:45:13,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 10:45:13,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 542 transitions. [2024-11-09 10:45:13,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5942982456140351 [2024-11-09 10:45:13,070 INFO L175 Difference]: Start difference. First operand has 143 places, 100 transitions, 1018 flow. Second operand 19 states and 542 transitions. [2024-11-09 10:45:13,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 285 transitions, 3001 flow [2024-11-09 10:45:13,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 285 transitions, 2751 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-11-09 10:45:13,109 INFO L231 Difference]: Finished difference. Result has 151 places, 113 transitions, 1164 flow [2024-11-09 10:45:13,109 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=870, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1164, PETRI_PLACES=151, PETRI_TRANSITIONS=113} [2024-11-09 10:45:13,110 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 105 predicate places. [2024-11-09 10:45:13,110 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 113 transitions, 1164 flow [2024-11-09 10:45:13,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.5) internal successors, (450), 20 states have internal predecessors, (450), 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) [2024-11-09 10:45:13,110 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:13,110 INFO L204 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] [2024-11-09 10:45:13,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 10:45:13,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:13,311 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:13,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:13,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2048627881, now seen corresponding path program 1 times [2024-11-09 10:45:13,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:13,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664282548] [2024-11-09 10:45:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:13,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:13,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:13,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:13,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664282548] [2024-11-09 10:45:13,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664282548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:13,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747599449] [2024-11-09 10:45:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:13,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:13,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:13,438 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:13,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 10:45:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:13,514 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:45:13,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:13,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:13,600 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:45:13,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747599449] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:13,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:45:13,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 15 [2024-11-09 10:45:13,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246887044] [2024-11-09 10:45:13,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:13,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:45:13,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:13,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:45:13,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:45:13,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-09 10:45:13,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 113 transitions, 1164 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 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) [2024-11-09 10:45:13,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:13,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-09 10:45:13,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:14,628 INFO L124 PetriNetUnfolderBase]: 3601/7540 cut-off events. [2024-11-09 10:45:14,629 INFO L125 PetriNetUnfolderBase]: For 34663/35279 co-relation queries the response was YES. [2024-11-09 10:45:14,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24402 conditions, 7540 events. 3601/7540 cut-off events. For 34663/35279 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 64833 event pairs, 1206 based on Foata normal form. 170/7267 useless extension candidates. Maximal degree in co-relation 14425. Up to 2766 conditions per place. [2024-11-09 10:45:14,667 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 87 selfloop transitions, 25 changer transitions 0/138 dead transitions. [2024-11-09 10:45:14,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 138 transitions, 1556 flow [2024-11-09 10:45:14,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:45:14,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:45:14,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-11-09 10:45:14,668 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-09 10:45:14,668 INFO L175 Difference]: Start difference. First operand has 151 places, 113 transitions, 1164 flow. Second operand 7 states and 208 transitions. [2024-11-09 10:45:14,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 138 transitions, 1556 flow [2024-11-09 10:45:14,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 138 transitions, 1453 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-11-09 10:45:14,690 INFO L231 Difference]: Finished difference. Result has 146 places, 113 transitions, 1128 flow [2024-11-09 10:45:14,691 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1128, PETRI_PLACES=146, PETRI_TRANSITIONS=113} [2024-11-09 10:45:14,691 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 100 predicate places. [2024-11-09 10:45:14,691 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 113 transitions, 1128 flow [2024-11-09 10:45:14,691 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 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) [2024-11-09 10:45:14,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:14,692 INFO L204 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] [2024-11-09 10:45:14,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 10:45:14,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:14,892 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:14,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:14,893 INFO L85 PathProgramCache]: Analyzing trace with hash 655182661, now seen corresponding path program 1 times [2024-11-09 10:45:14,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:14,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487607243] [2024-11-09 10:45:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:14,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:14,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:14,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487607243] [2024-11-09 10:45:14,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487607243] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:14,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622095911] [2024-11-09 10:45:14,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:14,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:14,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:14,994 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:14,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 10:45:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:15,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-09 10:45:15,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:15,140 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:45:15,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622095911] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:15,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:45:15,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 13 [2024-11-09 10:45:15,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066818138] [2024-11-09 10:45:15,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:15,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:45:15,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:15,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:45:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:45:15,229 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 48 [2024-11-09 10:45:15,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 113 transitions, 1128 flow. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 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) [2024-11-09 10:45:15,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:15,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 48 [2024-11-09 10:45:15,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:15,783 INFO L124 PetriNetUnfolderBase]: 2924/6123 cut-off events. [2024-11-09 10:45:15,783 INFO L125 PetriNetUnfolderBase]: For 29990/30625 co-relation queries the response was YES. [2024-11-09 10:45:15,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20417 conditions, 6123 events. 2924/6123 cut-off events. For 29990/30625 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 51537 event pairs, 1001 based on Foata normal form. 183/6003 useless extension candidates. Maximal degree in co-relation 11699. Up to 2380 conditions per place. [2024-11-09 10:45:15,816 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 91 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-11-09 10:45:15,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 142 transitions, 1560 flow [2024-11-09 10:45:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:45:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:45:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-11-09 10:45:15,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-11-09 10:45:15,817 INFO L175 Difference]: Start difference. First operand has 146 places, 113 transitions, 1128 flow. Second operand 7 states and 212 transitions. [2024-11-09 10:45:15,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 142 transitions, 1560 flow [2024-11-09 10:45:15,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 142 transitions, 1486 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-11-09 10:45:15,831 INFO L231 Difference]: Finished difference. Result has 145 places, 113 transitions, 1137 flow [2024-11-09 10:45:15,831 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1137, PETRI_PLACES=145, PETRI_TRANSITIONS=113} [2024-11-09 10:45:15,832 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 99 predicate places. [2024-11-09 10:45:15,832 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 113 transitions, 1137 flow [2024-11-09 10:45:15,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 6 states have internal predecessors, (157), 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) [2024-11-09 10:45:15,832 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:15,832 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:15,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 10:45:16,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 10:45:16,033 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:16,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:16,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1021666498, now seen corresponding path program 2 times [2024-11-09 10:45:16,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:16,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300781490] [2024-11-09 10:45:16,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:16,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:16,137 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:45:16,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:16,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300781490] [2024-11-09 10:45:16,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300781490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:16,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331334570] [2024-11-09 10:45:16,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:45:16,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:16,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:16,140 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:16,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 10:45:16,224 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:45:16,225 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:45:16,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 10:45:16,227 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:16,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:45:16,501 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 10:45:16,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:16,934 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 10:45:16,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331334570] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:16,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:16,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-09 10:45:16,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280858335] [2024-11-09 10:45:16,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:16,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 10:45:16,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:16,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 10:45:16,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-11-09 10:45:17,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:17,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 113 transitions, 1137 flow. Second operand has 19 states, 19 states have (on average 22.68421052631579) internal successors, (431), 19 states have internal predecessors, (431), 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) [2024-11-09 10:45:17,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:17,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:17,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:18,490 INFO L124 PetriNetUnfolderBase]: 3645/6871 cut-off events. [2024-11-09 10:45:18,490 INFO L125 PetriNetUnfolderBase]: For 27244/27782 co-relation queries the response was YES. [2024-11-09 10:45:18,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23462 conditions, 6871 events. 3645/6871 cut-off events. For 27244/27782 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 54130 event pairs, 851 based on Foata normal form. 52/6584 useless extension candidates. Maximal degree in co-relation 14760. Up to 2077 conditions per place. [2024-11-09 10:45:18,555 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 145 selfloop transitions, 52 changer transitions 0/213 dead transitions. [2024-11-09 10:45:18,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 213 transitions, 2207 flow [2024-11-09 10:45:18,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:45:18,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:45:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 391 transitions. [2024-11-09 10:45:18,556 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5818452380952381 [2024-11-09 10:45:18,556 INFO L175 Difference]: Start difference. First operand has 145 places, 113 transitions, 1137 flow. Second operand 14 states and 391 transitions. [2024-11-09 10:45:18,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 213 transitions, 2207 flow [2024-11-09 10:45:18,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 213 transitions, 2094 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-09 10:45:18,600 INFO L231 Difference]: Finished difference. Result has 149 places, 124 transitions, 1318 flow [2024-11-09 10:45:18,601 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1318, PETRI_PLACES=149, PETRI_TRANSITIONS=124} [2024-11-09 10:45:18,601 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 103 predicate places. [2024-11-09 10:45:18,601 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 124 transitions, 1318 flow [2024-11-09 10:45:18,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 22.68421052631579) internal successors, (431), 19 states have internal predecessors, (431), 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) [2024-11-09 10:45:18,602 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:18,602 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:45:18,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-09 10:45:18,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 10:45:18,802 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:18,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:18,803 INFO L85 PathProgramCache]: Analyzing trace with hash 312121496, now seen corresponding path program 2 times [2024-11-09 10:45:18,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:18,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017101868] [2024-11-09 10:45:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:18,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:18,948 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-09 10:45:18,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:18,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017101868] [2024-11-09 10:45:18,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017101868] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:18,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672936949] [2024-11-09 10:45:18,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:45:18,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:18,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:18,951 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:18,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 10:45:19,043 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:45:19,043 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:45:19,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 10:45:19,046 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:19,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:45:19,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:45:19,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:45:19,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 10:45:19,140 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:45:19,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:45:19,391 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 10:45:19,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-09 10:45:19,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672936949] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:19,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:19,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-09 10:45:19,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045654477] [2024-11-09 10:45:19,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:19,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:45:19,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:19,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:45:19,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:45:20,389 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-09 10:45:20,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 124 transitions, 1318 flow. Second operand has 18 states, 18 states have (on average 21.166666666666668) internal successors, (381), 18 states have internal predecessors, (381), 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) [2024-11-09 10:45:20,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:20,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-09 10:45:20,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:21,467 INFO L124 PetriNetUnfolderBase]: 3564/6743 cut-off events. [2024-11-09 10:45:21,467 INFO L125 PetriNetUnfolderBase]: For 26550/27241 co-relation queries the response was YES. [2024-11-09 10:45:21,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22633 conditions, 6743 events. 3564/6743 cut-off events. For 26550/27241 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 52353 event pairs, 791 based on Foata normal form. 57/6707 useless extension candidates. Maximal degree in co-relation 13827. Up to 1563 conditions per place. [2024-11-09 10:45:21,507 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 178 selfloop transitions, 65 changer transitions 0/262 dead transitions. [2024-11-09 10:45:21,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 262 transitions, 2908 flow [2024-11-09 10:45:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 10:45:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-09 10:45:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 539 transitions. [2024-11-09 10:45:21,509 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2024-11-09 10:45:21,509 INFO L175 Difference]: Start difference. First operand has 149 places, 124 transitions, 1318 flow. Second operand 22 states and 539 transitions. [2024-11-09 10:45:21,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 262 transitions, 2908 flow [2024-11-09 10:45:21,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 262 transitions, 2803 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-11-09 10:45:21,530 INFO L231 Difference]: Finished difference. Result has 161 places, 139 transitions, 1543 flow [2024-11-09 10:45:21,530 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1224, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1543, PETRI_PLACES=161, PETRI_TRANSITIONS=139} [2024-11-09 10:45:21,532 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 115 predicate places. [2024-11-09 10:45:21,536 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 139 transitions, 1543 flow [2024-11-09 10:45:21,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.166666666666668) internal successors, (381), 18 states have internal predecessors, (381), 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) [2024-11-09 10:45:21,536 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:21,536 INFO L204 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] [2024-11-09 10:45:21,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 10:45:21,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 10:45:21,737 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:21,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:21,737 INFO L85 PathProgramCache]: Analyzing trace with hash 719333222, now seen corresponding path program 1 times [2024-11-09 10:45:21,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:21,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009388493] [2024-11-09 10:45:21,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:21,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:21,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:21,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009388493] [2024-11-09 10:45:21,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009388493] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:21,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:21,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:45:21,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339114414] [2024-11-09 10:45:21,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:21,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:45:21,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:21,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:45:21,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:45:22,160 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:22,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 139 transitions, 1543 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:22,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:22,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:22,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:23,007 INFO L124 PetriNetUnfolderBase]: 5047/9376 cut-off events. [2024-11-09 10:45:23,007 INFO L125 PetriNetUnfolderBase]: For 33945/34022 co-relation queries the response was YES. [2024-11-09 10:45:23,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33913 conditions, 9376 events. 5047/9376 cut-off events. For 33945/34022 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 68881 event pairs, 1467 based on Foata normal form. 213/9535 useless extension candidates. Maximal degree in co-relation 21369. Up to 6935 conditions per place. [2024-11-09 10:45:23,067 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 160 selfloop transitions, 99 changer transitions 1/277 dead transitions. [2024-11-09 10:45:23,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 277 transitions, 3563 flow [2024-11-09 10:45:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:45:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:45:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 264 transitions. [2024-11-09 10:45:23,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-09 10:45:23,068 INFO L175 Difference]: Start difference. First operand has 161 places, 139 transitions, 1543 flow. Second operand 9 states and 264 transitions. [2024-11-09 10:45:23,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 277 transitions, 3563 flow [2024-11-09 10:45:23,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 277 transitions, 3472 flow, removed 14 selfloop flow, removed 11 redundant places. [2024-11-09 10:45:23,113 INFO L231 Difference]: Finished difference. Result has 164 places, 210 transitions, 2910 flow [2024-11-09 10:45:23,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2910, PETRI_PLACES=164, PETRI_TRANSITIONS=210} [2024-11-09 10:45:23,113 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 118 predicate places. [2024-11-09 10:45:23,113 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 210 transitions, 2910 flow [2024-11-09 10:45:23,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:23,114 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:23,114 INFO L204 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] [2024-11-09 10:45:23,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-09 10:45:23,114 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:23,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash 99944470, now seen corresponding path program 2 times [2024-11-09 10:45:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:23,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79409632] [2024-11-09 10:45:23,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:23,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:23,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:23,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79409632] [2024-11-09 10:45:23,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79409632] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:23,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:23,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:45:23,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441032320] [2024-11-09 10:45:23,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:23,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:45:23,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:23,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:45:23,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:45:23,520 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:23,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 210 transitions, 2910 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:23,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:23,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:23,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:24,420 INFO L124 PetriNetUnfolderBase]: 5119/9491 cut-off events. [2024-11-09 10:45:24,420 INFO L125 PetriNetUnfolderBase]: For 43086/43235 co-relation queries the response was YES. [2024-11-09 10:45:24,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39159 conditions, 9491 events. 5119/9491 cut-off events. For 43086/43235 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 70146 event pairs, 1592 based on Foata normal form. 113/9556 useless extension candidates. Maximal degree in co-relation 30188. Up to 7644 conditions per place. [2024-11-09 10:45:24,487 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 150 selfloop transitions, 116 changer transitions 14/297 dead transitions. [2024-11-09 10:45:24,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 297 transitions, 4565 flow [2024-11-09 10:45:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:45:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:45:24,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-09 10:45:24,488 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-09 10:45:24,488 INFO L175 Difference]: Start difference. First operand has 164 places, 210 transitions, 2910 flow. Second operand 9 states and 249 transitions. [2024-11-09 10:45:24,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 297 transitions, 4565 flow [2024-11-09 10:45:24,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 297 transitions, 4414 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-11-09 10:45:24,580 INFO L231 Difference]: Finished difference. Result has 176 places, 255 transitions, 4025 flow [2024-11-09 10:45:24,580 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=2803, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4025, PETRI_PLACES=176, PETRI_TRANSITIONS=255} [2024-11-09 10:45:24,580 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 130 predicate places. [2024-11-09 10:45:24,581 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 255 transitions, 4025 flow [2024-11-09 10:45:24,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:24,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:24,581 INFO L204 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] [2024-11-09 10:45:24,581 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-11-09 10:45:24,581 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:24,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:24,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1848137636, now seen corresponding path program 1 times [2024-11-09 10:45:24,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:24,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494465716] [2024-11-09 10:45:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:24,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:24,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:24,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:24,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494465716] [2024-11-09 10:45:24,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494465716] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:24,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:24,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:45:24,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277280126] [2024-11-09 10:45:24,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:24,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:45:24,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:24,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:45:24,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:45:24,994 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:24,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 255 transitions, 4025 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:24,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:24,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:24,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:26,053 INFO L124 PetriNetUnfolderBase]: 5101/9487 cut-off events. [2024-11-09 10:45:26,053 INFO L125 PetriNetUnfolderBase]: For 48216/48305 co-relation queries the response was YES. [2024-11-09 10:45:26,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40915 conditions, 9487 events. 5101/9487 cut-off events. For 48216/48305 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 70331 event pairs, 1388 based on Foata normal form. 134/9583 useless extension candidates. Maximal degree in co-relation 35436. Up to 7644 conditions per place. [2024-11-09 10:45:26,117 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 158 selfloop transitions, 116 changer transitions 22/313 dead transitions. [2024-11-09 10:45:26,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 313 transitions, 5182 flow [2024-11-09 10:45:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:45:26,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:45:26,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 254 transitions. [2024-11-09 10:45:26,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5879629629629629 [2024-11-09 10:45:26,118 INFO L175 Difference]: Start difference. First operand has 176 places, 255 transitions, 4025 flow. Second operand 9 states and 254 transitions. [2024-11-09 10:45:26,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 313 transitions, 5182 flow [2024-11-09 10:45:26,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 313 transitions, 5006 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-11-09 10:45:26,238 INFO L231 Difference]: Finished difference. Result has 181 places, 264 transitions, 4367 flow [2024-11-09 10:45:26,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=3906, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4367, PETRI_PLACES=181, PETRI_TRANSITIONS=264} [2024-11-09 10:45:26,238 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 135 predicate places. [2024-11-09 10:45:26,238 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 264 transitions, 4367 flow [2024-11-09 10:45:26,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:26,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:26,239 INFO L204 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] [2024-11-09 10:45:26,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-11-09 10:45:26,239 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:26,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:26,239 INFO L85 PathProgramCache]: Analyzing trace with hash -752425050, now seen corresponding path program 2 times [2024-11-09 10:45:26,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:26,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295047610] [2024-11-09 10:45:26,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:26,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:26,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:26,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:26,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295047610] [2024-11-09 10:45:26,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295047610] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:26,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:26,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:45:26,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165378774] [2024-11-09 10:45:26,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:26,484 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:45:26,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:26,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:45:26,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:45:26,623 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:26,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 264 transitions, 4367 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:26,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:26,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:26,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:27,870 INFO L124 PetriNetUnfolderBase]: 5119/9491 cut-off events. [2024-11-09 10:45:27,870 INFO L125 PetriNetUnfolderBase]: For 49871/50005 co-relation queries the response was YES. [2024-11-09 10:45:27,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41297 conditions, 9491 events. 5119/9491 cut-off events. For 49871/50005 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 69727 event pairs, 1880 based on Foata normal form. 107/9542 useless extension candidates. Maximal degree in co-relation 37255. Up to 7698 conditions per place. [2024-11-09 10:45:27,952 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 143 selfloop transitions, 159 changer transitions 9/328 dead transitions. [2024-11-09 10:45:27,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 328 transitions, 5894 flow [2024-11-09 10:45:27,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:45:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:45:27,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-09 10:45:27,953 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-09 10:45:27,953 INFO L175 Difference]: Start difference. First operand has 181 places, 264 transitions, 4367 flow. Second operand 9 states and 249 transitions. [2024-11-09 10:45:27,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 328 transitions, 5894 flow [2024-11-09 10:45:28,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 328 transitions, 5564 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-09 10:45:28,124 INFO L231 Difference]: Finished difference. Result has 183 places, 298 transitions, 5234 flow [2024-11-09 10:45:28,125 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5234, PETRI_PLACES=183, PETRI_TRANSITIONS=298} [2024-11-09 10:45:28,125 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 137 predicate places. [2024-11-09 10:45:28,125 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 298 transitions, 5234 flow [2024-11-09 10:45:28,125 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:28,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:28,126 INFO L204 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] [2024-11-09 10:45:28,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-11-09 10:45:28,126 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:28,126 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:28,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1787559940, now seen corresponding path program 3 times [2024-11-09 10:45:28,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:28,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230316925] [2024-11-09 10:45:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:28,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:28,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:28,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230316925] [2024-11-09 10:45:28,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230316925] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:28,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:28,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:45:28,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813319357] [2024-11-09 10:45:28,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:28,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:45:28,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:28,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:45:28,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:45:28,572 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:28,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 298 transitions, 5234 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:28,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:28,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:28,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:29,870 INFO L124 PetriNetUnfolderBase]: 5380/9907 cut-off events. [2024-11-09 10:45:29,870 INFO L125 PetriNetUnfolderBase]: For 56093/56167 co-relation queries the response was YES. [2024-11-09 10:45:29,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44782 conditions, 9907 events. 5380/9907 cut-off events. For 56093/56167 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 72766 event pairs, 1646 based on Foata normal form. 110/9979 useless extension candidates. Maximal degree in co-relation 38991. Up to 7806 conditions per place. [2024-11-09 10:45:29,959 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 149 selfloop transitions, 208 changer transitions 9/383 dead transitions. [2024-11-09 10:45:29,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 383 transitions, 7406 flow [2024-11-09 10:45:29,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:45:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:45:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-09 10:45:29,960 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-09 10:45:29,960 INFO L175 Difference]: Start difference. First operand has 183 places, 298 transitions, 5234 flow. Second operand 9 states and 249 transitions. [2024-11-09 10:45:29,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 383 transitions, 7406 flow [2024-11-09 10:45:30,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 383 transitions, 7025 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-11-09 10:45:30,239 INFO L231 Difference]: Finished difference. Result has 190 places, 355 transitions, 6778 flow [2024-11-09 10:45:30,240 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=4948, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6778, PETRI_PLACES=190, PETRI_TRANSITIONS=355} [2024-11-09 10:45:30,240 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 144 predicate places. [2024-11-09 10:45:30,240 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 355 transitions, 6778 flow [2024-11-09 10:45:30,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:30,240 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:30,240 INFO L204 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] [2024-11-09 10:45:30,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-09 10:45:30,241 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:30,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:30,241 INFO L85 PathProgramCache]: Analyzing trace with hash 518560062, now seen corresponding path program 3 times [2024-11-09 10:45:30,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:30,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150214810] [2024-11-09 10:45:30,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:30,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:30,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:30,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150214810] [2024-11-09 10:45:30,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150214810] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:30,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:30,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:45:30,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41873070] [2024-11-09 10:45:30,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:30,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:45:30,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:45:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:45:30,635 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:30,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 355 transitions, 6778 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:30,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:30,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:30,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:31,884 INFO L124 PetriNetUnfolderBase]: 5452/10066 cut-off events. [2024-11-09 10:45:31,884 INFO L125 PetriNetUnfolderBase]: For 61273/61407 co-relation queries the response was YES. [2024-11-09 10:45:31,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47052 conditions, 10066 events. 5452/10066 cut-off events. For 61273/61407 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 73485 event pairs, 2041 based on Foata normal form. 107/10117 useless extension candidates. Maximal degree in co-relation 42915. Up to 7851 conditions per place. [2024-11-09 10:45:31,974 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 146 selfloop transitions, 225 changer transitions 12/400 dead transitions. [2024-11-09 10:45:31,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 400 transitions, 8050 flow [2024-11-09 10:45:31,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:45:31,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:45:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 250 transitions. [2024-11-09 10:45:31,975 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5787037037037037 [2024-11-09 10:45:31,975 INFO L175 Difference]: Start difference. First operand has 190 places, 355 transitions, 6778 flow. Second operand 9 states and 250 transitions. [2024-11-09 10:45:31,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 400 transitions, 8050 flow [2024-11-09 10:45:32,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 400 transitions, 7792 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-09 10:45:32,287 INFO L231 Difference]: Finished difference. Result has 197 places, 370 transitions, 7451 flow [2024-11-09 10:45:32,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=6542, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7451, PETRI_PLACES=197, PETRI_TRANSITIONS=370} [2024-11-09 10:45:32,288 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 151 predicate places. [2024-11-09 10:45:32,288 INFO L471 AbstractCegarLoop]: Abstraction has has 197 places, 370 transitions, 7451 flow [2024-11-09 10:45:32,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:32,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:32,289 INFO L204 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] [2024-11-09 10:45:32,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-09 10:45:32,289 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:32,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:32,289 INFO L85 PathProgramCache]: Analyzing trace with hash 857973446, now seen corresponding path program 4 times [2024-11-09 10:45:32,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:32,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941210372] [2024-11-09 10:45:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:32,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:32,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:32,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:32,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941210372] [2024-11-09 10:45:32,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941210372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:32,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157384340] [2024-11-09 10:45:32,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:45:32,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:32,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:32,547 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:32,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 10:45:32,622 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:45:32,622 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:45:32,623 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 10:45:32,624 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:32,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 10:45:32,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:32,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:32,889 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-09 10:45:32,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-09 10:45:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:32,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157384340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:32,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:32,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 16 [2024-11-09 10:45:32,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078448247] [2024-11-09 10:45:32,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:32,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:45:32,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:32,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:45:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:45:33,197 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:33,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 370 transitions, 7451 flow. Second operand has 17 states, 17 states have (on average 22.705882352941178) internal successors, (386), 17 states have internal predecessors, (386), 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) [2024-11-09 10:45:33,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:33,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:33,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:34,676 INFO L124 PetriNetUnfolderBase]: 5477/10156 cut-off events. [2024-11-09 10:45:34,676 INFO L125 PetriNetUnfolderBase]: For 68871/68945 co-relation queries the response was YES. [2024-11-09 10:45:34,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48998 conditions, 10156 events. 5477/10156 cut-off events. For 68871/68945 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 75124 event pairs, 377 based on Foata normal form. 210/10328 useless extension candidates. Maximal degree in co-relation 46832. Up to 5249 conditions per place. [2024-11-09 10:45:34,729 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 174 selfloop transitions, 255 changer transitions 1/447 dead transitions. [2024-11-09 10:45:34,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 447 transitions, 9044 flow [2024-11-09 10:45:34,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:45:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:45:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 290 transitions. [2024-11-09 10:45:34,730 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-11-09 10:45:34,730 INFO L175 Difference]: Start difference. First operand has 197 places, 370 transitions, 7451 flow. Second operand 10 states and 290 transitions. [2024-11-09 10:45:34,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 447 transitions, 9044 flow [2024-11-09 10:45:35,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 447 transitions, 8646 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-11-09 10:45:35,007 INFO L231 Difference]: Finished difference. Result has 201 places, 381 transitions, 7798 flow [2024-11-09 10:45:35,007 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7060, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7798, PETRI_PLACES=201, PETRI_TRANSITIONS=381} [2024-11-09 10:45:35,007 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 155 predicate places. [2024-11-09 10:45:35,007 INFO L471 AbstractCegarLoop]: Abstraction has has 201 places, 381 transitions, 7798 flow [2024-11-09 10:45:35,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 22.705882352941178) internal successors, (386), 17 states have internal predecessors, (386), 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) [2024-11-09 10:45:35,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:35,008 INFO L204 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] [2024-11-09 10:45:35,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-09 10:45:35,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:35,209 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:35,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:35,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2009075494, now seen corresponding path program 4 times [2024-11-09 10:45:35,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:35,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672155294] [2024-11-09 10:45:35,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:35,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:35,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:35,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672155294] [2024-11-09 10:45:35,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672155294] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:35,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:35,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:45:35,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310981688] [2024-11-09 10:45:35,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:35,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:45:35,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:35,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:45:35,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:45:35,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:35,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 381 transitions, 7798 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:35,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:35,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:35,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:37,072 INFO L124 PetriNetUnfolderBase]: 5567/10319 cut-off events. [2024-11-09 10:45:37,072 INFO L125 PetriNetUnfolderBase]: For 81761/81835 co-relation queries the response was YES. [2024-11-09 10:45:37,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51145 conditions, 10319 events. 5567/10319 cut-off events. For 81761/81835 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 76795 event pairs, 1901 based on Foata normal form. 119/10392 useless extension candidates. Maximal degree in co-relation 48989. Up to 8526 conditions per place. [2024-11-09 10:45:37,140 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 164 selfloop transitions, 228 changer transitions 7/416 dead transitions. [2024-11-09 10:45:37,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 416 transitions, 9007 flow [2024-11-09 10:45:37,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:45:37,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:45:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 248 transitions. [2024-11-09 10:45:37,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-11-09 10:45:37,141 INFO L175 Difference]: Start difference. First operand has 201 places, 381 transitions, 7798 flow. Second operand 9 states and 248 transitions. [2024-11-09 10:45:37,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 416 transitions, 9007 flow [2024-11-09 10:45:37,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 416 transitions, 8503 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-11-09 10:45:37,492 INFO L231 Difference]: Finished difference. Result has 204 places, 391 transitions, 8087 flow [2024-11-09 10:45:37,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7316, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8087, PETRI_PLACES=204, PETRI_TRANSITIONS=391} [2024-11-09 10:45:37,493 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 158 predicate places. [2024-11-09 10:45:37,493 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 391 transitions, 8087 flow [2024-11-09 10:45:37,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:37,493 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:37,493 INFO L204 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] [2024-11-09 10:45:37,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-09 10:45:37,493 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:37,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:37,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1272781424, now seen corresponding path program 5 times [2024-11-09 10:45:37,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:37,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663263520] [2024-11-09 10:45:37,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:37,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:37,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:37,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663263520] [2024-11-09 10:45:37,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663263520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:37,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:37,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:45:37,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639754429] [2024-11-09 10:45:37,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:37,703 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:45:37,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:37,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:45:37,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:45:37,860 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:37,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 391 transitions, 8087 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:37,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:37,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:37,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:39,090 INFO L124 PetriNetUnfolderBase]: 5486/10157 cut-off events. [2024-11-09 10:45:39,090 INFO L125 PetriNetUnfolderBase]: For 77600/77674 co-relation queries the response was YES. [2024-11-09 10:45:39,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49373 conditions, 10157 events. 5486/10157 cut-off events. For 77600/77674 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 75452 event pairs, 1819 based on Foata normal form. 119/10230 useless extension candidates. Maximal degree in co-relation 47216. Up to 8526 conditions per place. [2024-11-09 10:45:39,164 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 172 selfloop transitions, 226 changer transitions 6/421 dead transitions. [2024-11-09 10:45:39,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 421 transitions, 9094 flow [2024-11-09 10:45:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:45:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:45:39,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 249 transitions. [2024-11-09 10:45:39,165 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-09 10:45:39,165 INFO L175 Difference]: Start difference. First operand has 204 places, 391 transitions, 8087 flow. Second operand 9 states and 249 transitions. [2024-11-09 10:45:39,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 421 transitions, 9094 flow [2024-11-09 10:45:39,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 421 transitions, 8729 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-09 10:45:39,536 INFO L231 Difference]: Finished difference. Result has 207 places, 390 transitions, 8189 flow [2024-11-09 10:45:39,536 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7734, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8189, PETRI_PLACES=207, PETRI_TRANSITIONS=390} [2024-11-09 10:45:39,537 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 161 predicate places. [2024-11-09 10:45:39,537 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 390 transitions, 8189 flow [2024-11-09 10:45:39,537 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:39,537 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:39,537 INFO L204 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] [2024-11-09 10:45:39,537 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-11-09 10:45:39,537 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:39,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:39,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2137821948, now seen corresponding path program 5 times [2024-11-09 10:45:39,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:39,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068934533] [2024-11-09 10:45:39,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:39,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:39,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:39,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:39,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068934533] [2024-11-09 10:45:39,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068934533] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:39,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:39,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:45:39,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074338828] [2024-11-09 10:45:39,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:39,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:45:39,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:39,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:45:39,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:45:39,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:39,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 390 transitions, 8189 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:39,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:39,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:39,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:41,354 INFO L124 PetriNetUnfolderBase]: 5423/10032 cut-off events. [2024-11-09 10:45:41,355 INFO L125 PetriNetUnfolderBase]: For 77273/77347 co-relation queries the response was YES. [2024-11-09 10:45:41,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48776 conditions, 10032 events. 5423/10032 cut-off events. For 77273/77347 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 74269 event pairs, 1955 based on Foata normal form. 110/10102 useless extension candidates. Maximal degree in co-relation 46566. Up to 8526 conditions per place. [2024-11-09 10:45:41,436 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 168 selfloop transitions, 227 changer transitions 3/415 dead transitions. [2024-11-09 10:45:41,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 415 transitions, 9143 flow [2024-11-09 10:45:41,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:45:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:45:41,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-11-09 10:45:41,437 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5671296296296297 [2024-11-09 10:45:41,437 INFO L175 Difference]: Start difference. First operand has 207 places, 390 transitions, 8189 flow. Second operand 9 states and 245 transitions. [2024-11-09 10:45:41,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 415 transitions, 9143 flow [2024-11-09 10:45:41,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 415 transitions, 8602 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-11-09 10:45:41,858 INFO L231 Difference]: Finished difference. Result has 206 places, 391 transitions, 8142 flow [2024-11-09 10:45:41,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7656, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8142, PETRI_PLACES=206, PETRI_TRANSITIONS=391} [2024-11-09 10:45:41,859 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 160 predicate places. [2024-11-09 10:45:41,859 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 391 transitions, 8142 flow [2024-11-09 10:45:41,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:41,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:41,859 INFO L204 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] [2024-11-09 10:45:41,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-11-09 10:45:41,860 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:41,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:41,860 INFO L85 PathProgramCache]: Analyzing trace with hash 2010812950, now seen corresponding path program 6 times [2024-11-09 10:45:41,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:41,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560294223] [2024-11-09 10:45:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:41,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:42,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:42,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560294223] [2024-11-09 10:45:42,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560294223] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:42,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711666228] [2024-11-09 10:45:42,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:45:42,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:42,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:42,078 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:42,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 10:45:42,143 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-09 10:45:42,143 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:45:42,144 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 10:45:42,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:42,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:45:42,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-09 10:45:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:42,295 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:42,415 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-09 10:45:42,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-09 10:45:42,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:42,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711666228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:42,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:42,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2024-11-09 10:45:42,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019116295] [2024-11-09 10:45:42,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:42,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 10:45:42,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:42,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 10:45:42,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-09 10:45:42,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:42,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 391 transitions, 8142 flow. Second operand has 19 states, 19 states have (on average 22.473684210526315) internal successors, (427), 19 states have internal predecessors, (427), 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) [2024-11-09 10:45:42,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:42,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:42,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:44,118 INFO L124 PetriNetUnfolderBase]: 5269/9870 cut-off events. [2024-11-09 10:45:44,118 INFO L125 PetriNetUnfolderBase]: For 72221/72295 co-relation queries the response was YES. [2024-11-09 10:45:44,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47948 conditions, 9870 events. 5269/9870 cut-off events. For 72221/72295 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 73847 event pairs, 1013 based on Foata normal form. 210/10052 useless extension candidates. Maximal degree in co-relation 45810. Up to 6843 conditions per place. [2024-11-09 10:45:44,206 INFO L140 encePairwiseOnDemand]: 37/48 looper letters, 174 selfloop transitions, 282 changer transitions 0/473 dead transitions. [2024-11-09 10:45:44,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 473 transitions, 9747 flow [2024-11-09 10:45:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:45:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:45:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 386 transitions. [2024-11-09 10:45:44,207 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-11-09 10:45:44,207 INFO L175 Difference]: Start difference. First operand has 206 places, 391 transitions, 8142 flow. Second operand 14 states and 386 transitions. [2024-11-09 10:45:44,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 473 transitions, 9747 flow [2024-11-09 10:45:44,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 473 transitions, 9412 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-09 10:45:44,607 INFO L231 Difference]: Finished difference. Result has 216 places, 416 transitions, 8909 flow [2024-11-09 10:45:44,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=7802, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8909, PETRI_PLACES=216, PETRI_TRANSITIONS=416} [2024-11-09 10:45:44,608 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 170 predicate places. [2024-11-09 10:45:44,608 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 416 transitions, 8909 flow [2024-11-09 10:45:44,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 22.473684210526315) internal successors, (427), 19 states have internal predecessors, (427), 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) [2024-11-09 10:45:44,608 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:44,608 INFO L204 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] [2024-11-09 10:45:44,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-09 10:45:44,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-09 10:45:44,809 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:44,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:44,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1730498628, now seen corresponding path program 6 times [2024-11-09 10:45:44,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:44,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776034521] [2024-11-09 10:45:44,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:44,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:45,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:45,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776034521] [2024-11-09 10:45:45,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776034521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:45,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:45,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:45:45,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380437160] [2024-11-09 10:45:45,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:45,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:45:45,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:45,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:45:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:45:45,126 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:45,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 416 transitions, 8909 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:45,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:45,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:45,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:46,459 INFO L124 PetriNetUnfolderBase]: 5224/9813 cut-off events. [2024-11-09 10:45:46,459 INFO L125 PetriNetUnfolderBase]: For 80034/80112 co-relation queries the response was YES. [2024-11-09 10:45:46,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48925 conditions, 9813 events. 5224/9813 cut-off events. For 80034/80112 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 73365 event pairs, 1719 based on Foata normal form. 119/9890 useless extension candidates. Maximal degree in co-relation 46766. Up to 8345 conditions per place. [2024-11-09 10:45:46,564 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 193 selfloop transitions, 217 changer transitions 4/431 dead transitions. [2024-11-09 10:45:46,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 431 transitions, 9622 flow [2024-11-09 10:45:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:45:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:45:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-11-09 10:45:46,565 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5671296296296297 [2024-11-09 10:45:46,565 INFO L175 Difference]: Start difference. First operand has 216 places, 416 transitions, 8909 flow. Second operand 9 states and 245 transitions. [2024-11-09 10:45:46,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 431 transitions, 9622 flow [2024-11-09 10:45:47,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 431 transitions, 9220 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-11-09 10:45:47,022 INFO L231 Difference]: Finished difference. Result has 216 places, 406 transitions, 8687 flow [2024-11-09 10:45:47,023 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8262, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8687, PETRI_PLACES=216, PETRI_TRANSITIONS=406} [2024-11-09 10:45:47,023 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 170 predicate places. [2024-11-09 10:45:47,023 INFO L471 AbstractCegarLoop]: Abstraction has has 216 places, 406 transitions, 8687 flow [2024-11-09 10:45:47,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:47,023 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:47,023 INFO L204 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] [2024-11-09 10:45:47,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-11-09 10:45:47,024 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:47,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:47,026 INFO L85 PathProgramCache]: Analyzing trace with hash 178111224, now seen corresponding path program 7 times [2024-11-09 10:45:47,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:47,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876122173] [2024-11-09 10:45:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:47,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:47,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:47,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:47,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876122173] [2024-11-09 10:45:47,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876122173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:47,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497282704] [2024-11-09 10:45:47,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:45:47,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:47,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:47,227 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:47,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 10:45:47,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:47,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:45:47,291 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:47,378 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:45:47,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-11-09 10:45:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:47,391 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:47,521 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-09 10:45:47,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-09 10:45:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:47,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497282704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:47,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:47,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 19 [2024-11-09 10:45:47,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546225625] [2024-11-09 10:45:47,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:47,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:45:47,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:47,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:45:47,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:45:47,827 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:47,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 406 transitions, 8687 flow. Second operand has 20 states, 20 states have (on average 22.75) internal successors, (455), 20 states have internal predecessors, (455), 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) [2024-11-09 10:45:47,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:47,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:47,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:49,254 INFO L124 PetriNetUnfolderBase]: 5367/10047 cut-off events. [2024-11-09 10:45:49,254 INFO L125 PetriNetUnfolderBase]: For 80306/80384 co-relation queries the response was YES. [2024-11-09 10:45:49,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50791 conditions, 10047 events. 5367/10047 cut-off events. For 80306/80384 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 75210 event pairs, 1569 based on Foata normal form. 192/10195 useless extension candidates. Maximal degree in co-relation 48568. Up to 8445 conditions per place. [2024-11-09 10:45:49,350 INFO L140 encePairwiseOnDemand]: 39/48 looper letters, 208 selfloop transitions, 226 changer transitions 0/451 dead transitions. [2024-11-09 10:45:49,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 451 transitions, 9990 flow [2024-11-09 10:45:49,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:45:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:45:49,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 271 transitions. [2024-11-09 10:45:49,351 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5645833333333333 [2024-11-09 10:45:49,351 INFO L175 Difference]: Start difference. First operand has 216 places, 406 transitions, 8687 flow. Second operand 10 states and 271 transitions. [2024-11-09 10:45:49,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 451 transitions, 9990 flow [2024-11-09 10:45:49,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 451 transitions, 9688 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-09 10:45:49,907 INFO L231 Difference]: Finished difference. Result has 219 places, 415 transitions, 9043 flow [2024-11-09 10:45:49,908 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8385, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9043, PETRI_PLACES=219, PETRI_TRANSITIONS=415} [2024-11-09 10:45:49,908 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 173 predicate places. [2024-11-09 10:45:49,908 INFO L471 AbstractCegarLoop]: Abstraction has has 219 places, 415 transitions, 9043 flow [2024-11-09 10:45:49,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 22.75) internal successors, (455), 20 states have internal predecessors, (455), 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) [2024-11-09 10:45:49,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:49,908 INFO L204 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] [2024-11-09 10:45:49,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 10:45:50,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:50,109 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:50,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:50,109 INFO L85 PathProgramCache]: Analyzing trace with hash -106185634, now seen corresponding path program 7 times [2024-11-09 10:45:50,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:50,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259067623] [2024-11-09 10:45:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:50,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:50,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:50,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:50,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259067623] [2024-11-09 10:45:50,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259067623] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:50,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281002301] [2024-11-09 10:45:50,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:45:50,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:50,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:50,347 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:50,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 10:45:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:50,425 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:45:50,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:50,531 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:45:50,531 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2024-11-09 10:45:50,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:50,558 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:50,679 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-09 10:45:50,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-09 10:45:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:50,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281002301] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:50,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:50,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2024-11-09 10:45:50,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880438414] [2024-11-09 10:45:50,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:50,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 10:45:50,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:50,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 10:45:50,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-09 10:45:51,041 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:51,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 415 transitions, 9043 flow. Second operand has 21 states, 21 states have (on average 22.80952380952381) internal successors, (479), 21 states have internal predecessors, (479), 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) [2024-11-09 10:45:51,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:51,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:51,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:52,735 INFO L124 PetriNetUnfolderBase]: 5867/11093 cut-off events. [2024-11-09 10:45:52,735 INFO L125 PetriNetUnfolderBase]: For 98172/98250 co-relation queries the response was YES. [2024-11-09 10:45:52,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56819 conditions, 11093 events. 5867/11093 cut-off events. For 98172/98250 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 85534 event pairs, 1659 based on Foata normal form. 210/11259 useless extension candidates. Maximal degree in co-relation 54577. Up to 8778 conditions per place. [2024-11-09 10:45:52,798 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 219 selfloop transitions, 263 changer transitions 0/499 dead transitions. [2024-11-09 10:45:52,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 499 transitions, 11383 flow [2024-11-09 10:45:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:45:52,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:45:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 327 transitions. [2024-11-09 10:45:52,799 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5677083333333334 [2024-11-09 10:45:52,799 INFO L175 Difference]: Start difference. First operand has 219 places, 415 transitions, 9043 flow. Second operand 12 states and 327 transitions. [2024-11-09 10:45:52,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 499 transitions, 11383 flow [2024-11-09 10:45:53,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 499 transitions, 10726 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-11-09 10:45:53,224 INFO L231 Difference]: Finished difference. Result has 224 places, 460 transitions, 10197 flow [2024-11-09 10:45:53,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=8476, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10197, PETRI_PLACES=224, PETRI_TRANSITIONS=460} [2024-11-09 10:45:53,224 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 178 predicate places. [2024-11-09 10:45:53,224 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 460 transitions, 10197 flow [2024-11-09 10:45:53,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 22.80952380952381) internal successors, (479), 21 states have internal predecessors, (479), 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) [2024-11-09 10:45:53,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:53,225 INFO L204 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] [2024-11-09 10:45:53,237 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 10:45:53,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:53,425 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:53,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1919199430, now seen corresponding path program 8 times [2024-11-09 10:45:53,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:53,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665448006] [2024-11-09 10:45:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:53,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:53,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:53,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665448006] [2024-11-09 10:45:53,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665448006] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:45:53,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049389647] [2024-11-09 10:45:53,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:45:53,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:53,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:45:53,624 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:45:53,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 10:45:53,694 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:45:53,694 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:45:53,695 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 10:45:53,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:45:53,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:45:53,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 21 [2024-11-09 10:45:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:53,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:45:53,890 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-09 10:45:53,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-09 10:45:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:53,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049389647] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:45:53,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:45:53,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2024-11-09 10:45:53,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003247403] [2024-11-09 10:45:53,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:45:53,915 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:45:53,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:53,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:45:53,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:45:54,173 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:54,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 460 transitions, 10197 flow. Second operand has 18 states, 18 states have (on average 22.555555555555557) internal successors, (406), 18 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:54,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:54,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:54,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:56,161 INFO L124 PetriNetUnfolderBase]: 6588/12593 cut-off events. [2024-11-09 10:45:56,161 INFO L125 PetriNetUnfolderBase]: For 117132/117210 co-relation queries the response was YES. [2024-11-09 10:45:56,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64338 conditions, 12593 events. 6588/12593 cut-off events. For 117132/117210 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 100719 event pairs, 1785 based on Foata normal form. 210/12751 useless extension candidates. Maximal degree in co-relation 61071. Up to 9610 conditions per place. [2024-11-09 10:45:56,266 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 240 selfloop transitions, 288 changer transitions 0/545 dead transitions. [2024-11-09 10:45:56,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 545 transitions, 12107 flow [2024-11-09 10:45:56,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:45:56,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:45:56,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 390 transitions. [2024-11-09 10:45:56,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-11-09 10:45:56,267 INFO L175 Difference]: Start difference. First operand has 224 places, 460 transitions, 10197 flow. Second operand 14 states and 390 transitions. [2024-11-09 10:45:56,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 545 transitions, 12107 flow [2024-11-09 10:45:56,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 545 transitions, 11606 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-09 10:45:56,851 INFO L231 Difference]: Finished difference. Result has 235 places, 491 transitions, 11032 flow [2024-11-09 10:45:56,851 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=9700, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11032, PETRI_PLACES=235, PETRI_TRANSITIONS=491} [2024-11-09 10:45:56,852 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 189 predicate places. [2024-11-09 10:45:56,852 INFO L471 AbstractCegarLoop]: Abstraction has has 235 places, 491 transitions, 11032 flow [2024-11-09 10:45:56,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 22.555555555555557) internal successors, (406), 18 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:45:56,852 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:45:56,852 INFO L204 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] [2024-11-09 10:45:56,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 10:45:57,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:45:57,053 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:45:57,053 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:45:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash -959884826, now seen corresponding path program 9 times [2024-11-09 10:45:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:45:57,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348036859] [2024-11-09 10:45:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:45:57,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:45:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:45:57,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:45:57,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:45:57,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348036859] [2024-11-09 10:45:57,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348036859] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:45:57,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:45:57,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 10:45:57,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046099473] [2024-11-09 10:45:57,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:45:57,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 10:45:57,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:45:57,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 10:45:57,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:45:57,386 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 48 [2024-11-09 10:45:57,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 491 transitions, 11032 flow. Second operand has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:45:57,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:45:57,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 48 [2024-11-09 10:45:57,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:45:59,117 INFO L124 PetriNetUnfolderBase]: 6330/11989 cut-off events. [2024-11-09 10:45:59,118 INFO L125 PetriNetUnfolderBase]: For 126648/126730 co-relation queries the response was YES. [2024-11-09 10:45:59,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64390 conditions, 11989 events. 6330/11989 cut-off events. For 126648/126730 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 94094 event pairs, 1924 based on Foata normal form. 110/12047 useless extension candidates. Maximal degree in co-relation 60946. Up to 10410 conditions per place. [2024-11-09 10:45:59,233 INFO L140 encePairwiseOnDemand]: 38/48 looper letters, 237 selfloop transitions, 241 changer transitions 3/498 dead transitions. [2024-11-09 10:45:59,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 498 transitions, 11787 flow [2024-11-09 10:45:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:45:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:45:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-11-09 10:45:59,234 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2024-11-09 10:45:59,234 INFO L175 Difference]: Start difference. First operand has 235 places, 491 transitions, 11032 flow. Second operand 9 states and 244 transitions. [2024-11-09 10:45:59,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 498 transitions, 11787 flow [2024-11-09 10:46:00,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 498 transitions, 11454 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-11-09 10:46:00,028 INFO L231 Difference]: Finished difference. Result has 238 places, 481 transitions, 10902 flow [2024-11-09 10:46:00,029 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=10432, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10902, PETRI_PLACES=238, PETRI_TRANSITIONS=481} [2024-11-09 10:46:00,029 INFO L277 CegarLoopForPetriNet]: 46 programPoint places, 192 predicate places. [2024-11-09 10:46:00,029 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 481 transitions, 10902 flow [2024-11-09 10:46:00,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 22.3) internal successors, (223), 10 states have internal predecessors, (223), 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) [2024-11-09 10:46:00,029 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:46:00,029 INFO L204 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] [2024-11-09 10:46:00,030 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-11-09 10:46:00,030 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-09 10:46:00,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:46:00,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1436443682, now seen corresponding path program 10 times [2024-11-09 10:46:00,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:46:00,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133889658] [2024-11-09 10:46:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:46:00,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:46:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat