./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/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/popl20-send-receive-alt.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 d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:51:33,764 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:51:33,817 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:51:33,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:51:33,823 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:51:33,848 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:51:33,849 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:51:33,849 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:51:33,850 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:51:33,850 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:51:33,851 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:51:33,852 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:51:33,852 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:51:33,852 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:51:33,853 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:51:33,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:51:33,854 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:51:33,854 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:51:33,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:51:33,854 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:51:33,854 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:51:33,855 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:51:33,855 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:51:33,855 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:51:33,856 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:51:33,856 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:51:33,856 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:51:33,856 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:51:33,856 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:51:33,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:51:33,857 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:51:33,857 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:51:33,857 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:51:33,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:51:33,858 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:51:33,858 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:51:33,858 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:51:33,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:51:33,858 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:51:33,859 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:51:33,859 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:51:33,859 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:51:33,859 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2a575889db2e07e0d6a3fd2f8635ba39d2afc2713d706bcd4d4aaa862bed792 [2024-11-22 21:51:34,062 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:51:34,081 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:51:34,083 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:51:34,083 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:51:34,084 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:51:34,085 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-22 21:51:35,297 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:51:35,446 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:51:35,446 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2024-11-22 21:51:35,452 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bb2cb0d9/01d97fbd28d64648a8fca73c9942a474/FLAG93a9d7c06 [2024-11-22 21:51:35,463 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bb2cb0d9/01d97fbd28d64648a8fca73c9942a474 [2024-11-22 21:51:35,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:51:35,466 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:51:35,468 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:51:35,468 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:51:35,472 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:51:35,472 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,473 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fd9a48b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35, skipping insertion in model container [2024-11-22 21:51:35,473 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,497 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:51:35,693 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:51:35,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:51:35,703 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:51:35,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:51:35,732 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:51:35,732 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35 WrapperNode [2024-11-22 21:51:35,732 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:51:35,733 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:51:35,733 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:51:35,733 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:51:35,739 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,744 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,761 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 141 [2024-11-22 21:51:35,761 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:51:35,762 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:51:35,762 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:51:35,762 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:51:35,771 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,771 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,774 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,784 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-22 21:51:35,785 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,785 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,789 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,791 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,792 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,795 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:51:35,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:51:35,796 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:51:35,796 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:51:35,796 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (1/1) ... [2024-11-22 21:51:35,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:51:35,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:35,820 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:51:35,822 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 [2024-11-22 21:51:35,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:51:35,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:51:35,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:51:35,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:51:35,860 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:51:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:51:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:51:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:51:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:51:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 21:51:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 21:51:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:51:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:51:35,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:51:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:51:35,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:51:35,861 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:51:35,933 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:51:35,935 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:51:36,147 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:51:36,147 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:51:36,307 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:51:36,307 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 21:51:36,308 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:51:36 BoogieIcfgContainer [2024-11-22 21:51:36,308 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:51:36,310 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:51:36,311 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:51:36,313 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:51:36,313 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:51:35" (1/3) ... [2024-11-22 21:51:36,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2f3363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:51:36, skipping insertion in model container [2024-11-22 21:51:36,314 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:35" (2/3) ... [2024-11-22 21:51:36,314 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2f3363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:51:36, skipping insertion in model container [2024-11-22 21:51:36,315 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:51:36" (3/3) ... [2024-11-22 21:51:36,316 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2024-11-22 21:51:36,329 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:51:36,329 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-22 21:51:36,329 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:51:36,379 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 21:51:36,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 100 flow [2024-11-22 21:51:36,429 INFO L124 PetriNetUnfolderBase]: 6/41 cut-off events. [2024-11-22 21:51:36,429 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:51:36,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 6/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 79 event pairs, 0 based on Foata normal form. 0/25 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-22 21:51:36,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 100 flow [2024-11-22 21:51:36,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 40 transitions, 92 flow [2024-11-22 21:51:36,443 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:51:36,448 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;@4cbfb458, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:51:36,448 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-22 21:51:36,454 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:51:36,454 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:51:36,454 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:51:36,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:36,455 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:51:36,455 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:36,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:36,460 INFO L85 PathProgramCache]: Analyzing trace with hash 456965, now seen corresponding path program 1 times [2024-11-22 21:51:36,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:36,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552457008] [2024-11-22 21:51:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:36,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:36,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:36,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:36,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552457008] [2024-11-22 21:51:36,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552457008] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:36,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:36,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:51:36,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372157691] [2024-11-22 21:51:36,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:36,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:36,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:36,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:36,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:36,737 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-11-22 21:51:36,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-22 21:51:36,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:36,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-11-22 21:51:36,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:36,898 INFO L124 PetriNetUnfolderBase]: 308/550 cut-off events. [2024-11-22 21:51:36,899 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-22 21:51:36,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 550 events. 308/550 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2429 event pairs, 250 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 1005. Up to 497 conditions per place. [2024-11-22 21:51:36,905 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-11-22 21:51:36,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 140 flow [2024-11-22 21:51:36,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 60 transitions. [2024-11-22 21:51:36,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-11-22 21:51:36,919 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 92 flow. Second operand 3 states and 60 transitions. [2024-11-22 21:51:36,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 140 flow [2024-11-22 21:51:36,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 132 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:51:36,924 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-11-22 21:51:36,926 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-22 21:51:36,928 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-11-22 21:51:36,929 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-11-22 21:51:36,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2024-11-22 21:51:36,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:36,929 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:51:36,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:51:36,931 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:36,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:36,933 INFO L85 PathProgramCache]: Analyzing trace with hash 456966, now seen corresponding path program 1 times [2024-11-22 21:51:36,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:36,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575597287] [2024-11-22 21:51:36,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:36,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:37,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:37,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:37,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575597287] [2024-11-22 21:51:37,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575597287] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:37,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:37,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:37,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358727464] [2024-11-22 21:51:37,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:37,154 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:37,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:37,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:37,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:37,163 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-11-22 21:51:37,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-11-22 21:51:37,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:37,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-11-22 21:51:37,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:37,313 INFO L124 PetriNetUnfolderBase]: 309/553 cut-off events. [2024-11-22 21:51:37,314 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-22 21:51:37,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 553 events. 309/553 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2443 event pairs, 250 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1049. Up to 502 conditions per place. [2024-11-22 21:51:37,319 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 29 selfloop transitions, 4 changer transitions 0/38 dead transitions. [2024-11-22 21:51:37,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 38 transitions, 152 flow [2024-11-22 21:51:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:37,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:37,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-11-22 21:51:37,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-11-22 21:51:37,322 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 4 states and 70 transitions. [2024-11-22 21:51:37,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 38 transitions, 152 flow [2024-11-22 21:51:37,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:37,324 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 101 flow [2024-11-22 21:51:37,324 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-11-22 21:51:37,325 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-11-22 21:51:37,325 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 101 flow [2024-11-22 21:51:37,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2024-11-22 21:51:37,325 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:37,325 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:51:37,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:51:37,325 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:37,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:37,326 INFO L85 PathProgramCache]: Analyzing trace with hash 439158271, now seen corresponding path program 1 times [2024-11-22 21:51:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:37,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169679433] [2024-11-22 21:51:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:37,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:37,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:37,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169679433] [2024-11-22 21:51:37,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169679433] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:37,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747994457] [2024-11-22 21:51:37,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:37,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:37,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:37,612 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) [2024-11-22 21:51:37,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:51:37,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:37,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:51:37,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:37,720 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 [2024-11-22 21:51:37,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:37,855 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:37,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747994457] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:37,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:37,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:51:37,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158029345] [2024-11-22 21:51:37,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:37,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:51:37,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:37,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:51:37,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:51:37,979 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-11-22 21:51:37,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 101 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-11-22 21:51:37,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:37,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-11-22 21:51:37,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:38,248 INFO L124 PetriNetUnfolderBase]: 309/552 cut-off events. [2024-11-22 21:51:38,249 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-22 21:51:38,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 552 events. 309/552 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2433 event pairs, 250 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 1056. Up to 498 conditions per place. [2024-11-22 21:51:38,252 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 25 selfloop transitions, 7 changer transitions 0/37 dead transitions. [2024-11-22 21:51:38,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 161 flow [2024-11-22 21:51:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:51:38,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:51:38,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 87 transitions. [2024-11-22 21:51:38,254 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3372093023255814 [2024-11-22 21:51:38,254 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 101 flow. Second operand 6 states and 87 transitions. [2024-11-22 21:51:38,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 161 flow [2024-11-22 21:51:38,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:38,255 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2024-11-22 21:51:38,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-22 21:51:38,256 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 1 predicate places. [2024-11-22 21:51:38,257 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2024-11-22 21:51:38,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 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) [2024-11-22 21:51:38,257 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:38,257 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:38,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:51:38,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:38,460 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:38,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:38,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1210182854, now seen corresponding path program 1 times [2024-11-22 21:51:38,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:38,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191363419] [2024-11-22 21:51:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:38,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:38,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:38,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:38,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191363419] [2024-11-22 21:51:38,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191363419] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:38,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:38,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:51:38,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634817348] [2024-11-22 21:51:38,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:38,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:38,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:38,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:38,508 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-22 21:51:38,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-22 21:51:38,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:38,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-22 21:51:38,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:38,592 INFO L124 PetriNetUnfolderBase]: 404/742 cut-off events. [2024-11-22 21:51:38,593 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-22 21:51:38,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1454 conditions, 742 events. 404/742 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3426 event pairs, 186 based on Foata normal form. 22/525 useless extension candidates. Maximal degree in co-relation 1428. Up to 420 conditions per place. [2024-11-22 21:51:38,596 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 47 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2024-11-22 21:51:38,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 246 flow [2024-11-22 21:51:38,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:38,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-11-22 21:51:38,597 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6201550387596899 [2024-11-22 21:51:38,597 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 3 states and 80 transitions. [2024-11-22 21:51:38,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 246 flow [2024-11-22 21:51:38,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 55 transitions, 216 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-22 21:51:38,599 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 101 flow [2024-11-22 21:51:38,599 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=101, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2024-11-22 21:51:38,599 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-11-22 21:51:38,599 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 101 flow [2024-11-22 21:51:38,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2024-11-22 21:51:38,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:38,600 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:38,600 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:51:38,600 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:38,600 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:38,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1340572448, now seen corresponding path program 1 times [2024-11-22 21:51:38,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:38,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195875503] [2024-11-22 21:51:38,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:38,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:38,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:38,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:38,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195875503] [2024-11-22 21:51:38,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195875503] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:38,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:38,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:38,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709333851] [2024-11-22 21:51:38,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:38,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:38,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:38,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:38,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:38,661 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-11-22 21:51:38,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 101 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2024-11-22 21:51:38,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:38,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-11-22 21:51:38,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:38,730 INFO L124 PetriNetUnfolderBase]: 303/568 cut-off events. [2024-11-22 21:51:38,730 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2024-11-22 21:51:38,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1196 conditions, 568 events. 303/568 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2437 event pairs, 246 based on Foata normal form. 0/472 useless extension candidates. Maximal degree in co-relation 460. Up to 510 conditions per place. [2024-11-22 21:51:38,733 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 28 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2024-11-22 21:51:38,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 155 flow [2024-11-22 21:51:38,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:38,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:38,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2024-11-22 21:51:38,734 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37790697674418605 [2024-11-22 21:51:38,734 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 101 flow. Second operand 4 states and 65 transitions. [2024-11-22 21:51:38,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 155 flow [2024-11-22 21:51:38,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 152 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:38,735 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 96 flow [2024-11-22 21:51:38,736 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=96, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-22 21:51:38,736 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-22 21:51:38,736 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 96 flow [2024-11-22 21:51:38,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2024-11-22 21:51:38,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:38,737 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:38,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:51:38,737 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:38,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:38,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1340572447, now seen corresponding path program 1 times [2024-11-22 21:51:38,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:38,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950780545] [2024-11-22 21:51:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:38,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:38,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:38,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950780545] [2024-11-22 21:51:38,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950780545] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:38,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:38,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:38,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061905611] [2024-11-22 21:51:38,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:38,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:38,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:38,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:38,783 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-22 21:51:38,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-11-22 21:51:38,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:38,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-22 21:51:38,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:38,863 INFO L124 PetriNetUnfolderBase]: 370/705 cut-off events. [2024-11-22 21:51:38,863 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-22 21:51:38,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 705 events. 370/705 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 3132 event pairs, 314 based on Foata normal form. 0/599 useless extension candidates. Maximal degree in co-relation 1155. Up to 513 conditions per place. [2024-11-22 21:51:38,866 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 42 selfloop transitions, 3 changer transitions 1/51 dead transitions. [2024-11-22 21:51:38,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 222 flow [2024-11-22 21:51:38,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:38,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:38,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-11-22 21:51:38,867 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4941860465116279 [2024-11-22 21:51:38,867 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 96 flow. Second operand 4 states and 85 transitions. [2024-11-22 21:51:38,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 222 flow [2024-11-22 21:51:38,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:38,868 INFO L231 Difference]: Finished difference. Result has 39 places, 36 transitions, 101 flow [2024-11-22 21:51:38,868 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=36} [2024-11-22 21:51:38,869 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-11-22 21:51:38,869 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 36 transitions, 101 flow [2024-11-22 21:51:38,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-11-22 21:51:38,870 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:38,870 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:38,870 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:51:38,870 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:38,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:38,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1756260920, now seen corresponding path program 1 times [2024-11-22 21:51:38,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:38,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477012144] [2024-11-22 21:51:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:38,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:38,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:38,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477012144] [2024-11-22 21:51:38,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477012144] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:38,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833240953] [2024-11-22 21:51:38,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:38,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:38,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:38,999 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) [2024-11-22 21:51:39,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:51:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:39,060 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:51:39,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:39,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:39,144 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:51:39,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833240953] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:39,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:51:39,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-22 21:51:39,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307228322] [2024-11-22 21:51:39,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:39,144 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:51:39,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:39,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:51:39,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:51:39,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-22 21:51:39,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 36 transitions, 101 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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) [2024-11-22 21:51:39,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:39,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-22 21:51:39,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:39,267 INFO L124 PetriNetUnfolderBase]: 281/562 cut-off events. [2024-11-22 21:51:39,268 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-22 21:51:39,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1166 conditions, 562 events. 281/562 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 2419 event pairs, 202 based on Foata normal form. 48/546 useless extension candidates. Maximal degree in co-relation 870. Up to 437 conditions per place. [2024-11-22 21:51:39,270 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 27 selfloop transitions, 8 changer transitions 0/40 dead transitions. [2024-11-22 21:51:39,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 40 transitions, 180 flow [2024-11-22 21:51:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:51:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:51:39,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-11-22 21:51:39,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39069767441860465 [2024-11-22 21:51:39,272 INFO L175 Difference]: Start difference. First operand has 39 places, 36 transitions, 101 flow. Second operand 5 states and 84 transitions. [2024-11-22 21:51:39,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 40 transitions, 180 flow [2024-11-22 21:51:39,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 40 transitions, 175 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:39,273 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 104 flow [2024-11-22 21:51:39,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2024-11-22 21:51:39,275 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -3 predicate places. [2024-11-22 21:51:39,276 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 104 flow [2024-11-22 21:51:39,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 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) [2024-11-22 21:51:39,276 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:39,276 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:39,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:51:39,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-22 21:51:39,477 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:39,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:39,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1108381587, now seen corresponding path program 1 times [2024-11-22 21:51:39,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:39,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000501309] [2024-11-22 21:51:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:39,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:39,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:39,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:39,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000501309] [2024-11-22 21:51:39,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000501309] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:39,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:39,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:39,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659841811] [2024-11-22 21:51:39,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:39,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:39,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:39,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:39,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:39,506 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-22 21:51:39,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-11-22 21:51:39,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:39,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-22 21:51:39,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:39,567 INFO L124 PetriNetUnfolderBase]: 355/670 cut-off events. [2024-11-22 21:51:39,568 INFO L125 PetriNetUnfolderBase]: For 271/271 co-relation queries the response was YES. [2024-11-22 21:51:39,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1529 conditions, 670 events. 355/670 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2786 event pairs, 220 based on Foata normal form. 3/600 useless extension candidates. Maximal degree in co-relation 1228. Up to 459 conditions per place. [2024-11-22 21:51:39,570 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 35 selfloop transitions, 2 changer transitions 5/47 dead transitions. [2024-11-22 21:51:39,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 47 transitions, 232 flow [2024-11-22 21:51:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:39,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:39,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-11-22 21:51:39,571 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5271317829457365 [2024-11-22 21:51:39,571 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 104 flow. Second operand 3 states and 68 transitions. [2024-11-22 21:51:39,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 47 transitions, 232 flow [2024-11-22 21:51:39,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 47 transitions, 210 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:51:39,573 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 97 flow [2024-11-22 21:51:39,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-11-22 21:51:39,573 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-22 21:51:39,573 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 97 flow [2024-11-22 21:51:39,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 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) [2024-11-22 21:51:39,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:39,574 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:39,574 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:51:39,574 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:39,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:39,574 INFO L85 PathProgramCache]: Analyzing trace with hash -258662319, now seen corresponding path program 1 times [2024-11-22 21:51:39,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:39,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140520390] [2024-11-22 21:51:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:39,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:39,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:40,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:40,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:40,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140520390] [2024-11-22 21:51:40,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140520390] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:40,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068292660] [2024-11-22 21:51:40,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:40,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:40,081 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) [2024-11-22 21:51:40,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:51:40,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:40,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-22 21:51:40,142 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:40,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2024-11-22 21:51:40,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:40,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:40,810 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 61 treesize of output 55 [2024-11-22 21:51:40,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:51:40,824 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 78 treesize of output 68 [2024-11-22 21:51:40,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:40,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068292660] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:40,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:40,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2024-11-22 21:51:40,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782165240] [2024-11-22 21:51:40,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:40,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 21:51:40,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:40,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 21:51:40,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-11-22 21:51:40,960 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-22 21:51:40,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 97 flow. Second operand has 19 states, 19 states have (on average 13.473684210526315) internal successors, (256), 19 states have internal predecessors, (256), 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) [2024-11-22 21:51:40,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:40,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-22 21:51:40,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:42,257 INFO L124 PetriNetUnfolderBase]: 1547/2943 cut-off events. [2024-11-22 21:51:42,257 INFO L125 PetriNetUnfolderBase]: For 797/797 co-relation queries the response was YES. [2024-11-22 21:51:42,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6366 conditions, 2943 events. 1547/2943 cut-off events. For 797/797 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 17465 event pairs, 321 based on Foata normal form. 35/2646 useless extension candidates. Maximal degree in co-relation 5178. Up to 521 conditions per place. [2024-11-22 21:51:42,268 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 144 selfloop transitions, 39 changer transitions 62/250 dead transitions. [2024-11-22 21:51:42,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 250 transitions, 1194 flow [2024-11-22 21:51:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-22 21:51:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-22 21:51:42,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 473 transitions. [2024-11-22 21:51:42,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-22 21:51:42,270 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 97 flow. Second operand 22 states and 473 transitions. [2024-11-22 21:51:42,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 250 transitions, 1194 flow [2024-11-22 21:51:42,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 250 transitions, 1162 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:42,276 INFO L231 Difference]: Finished difference. Result has 67 places, 77 transitions, 465 flow [2024-11-22 21:51:42,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=465, PETRI_PLACES=67, PETRI_TRANSITIONS=77} [2024-11-22 21:51:42,277 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-11-22 21:51:42,277 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 77 transitions, 465 flow [2024-11-22 21:51:42,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.473684210526315) internal successors, (256), 19 states have internal predecessors, (256), 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) [2024-11-22 21:51:42,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:42,277 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:42,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:51:42,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:42,482 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:42,482 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:42,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1644429965, now seen corresponding path program 1 times [2024-11-22 21:51:42,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:42,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942633671] [2024-11-22 21:51:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:42,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:42,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:42,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942633671] [2024-11-22 21:51:42,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942633671] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:42,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:42,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:42,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783428542] [2024-11-22 21:51:42,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:42,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:42,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:42,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:42,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:42,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-11-22 21:51:42,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 77 transitions, 465 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-11-22 21:51:42,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:42,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-11-22 21:51:42,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:42,782 INFO L124 PetriNetUnfolderBase]: 1606/2830 cut-off events. [2024-11-22 21:51:42,782 INFO L125 PetriNetUnfolderBase]: For 2542/2542 co-relation queries the response was YES. [2024-11-22 21:51:42,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7205 conditions, 2830 events. 1606/2830 cut-off events. For 2542/2542 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 15008 event pairs, 1054 based on Foata normal form. 22/2656 useless extension candidates. Maximal degree in co-relation 7164. Up to 2325 conditions per place. [2024-11-22 21:51:42,795 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 76 selfloop transitions, 2 changer transitions 3/84 dead transitions. [2024-11-22 21:51:42,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 84 transitions, 634 flow [2024-11-22 21:51:42,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:42,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 64 transitions. [2024-11-22 21:51:42,797 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49612403100775193 [2024-11-22 21:51:42,797 INFO L175 Difference]: Start difference. First operand has 67 places, 77 transitions, 465 flow. Second operand 3 states and 64 transitions. [2024-11-22 21:51:42,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 84 transitions, 634 flow [2024-11-22 21:51:42,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 84 transitions, 550 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:42,806 INFO L231 Difference]: Finished difference. Result has 65 places, 67 transitions, 326 flow [2024-11-22 21:51:42,806 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=326, PETRI_PLACES=65, PETRI_TRANSITIONS=67} [2024-11-22 21:51:42,807 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2024-11-22 21:51:42,807 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 67 transitions, 326 flow [2024-11-22 21:51:42,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 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) [2024-11-22 21:51:42,807 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:42,807 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:42,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:51:42,807 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:42,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:42,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1682861776, now seen corresponding path program 2 times [2024-11-22 21:51:42,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:42,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726070752] [2024-11-22 21:51:42,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:42,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:42,834 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:42,834 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:43,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:43,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:43,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726070752] [2024-11-22 21:51:43,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726070752] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:43,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077362019] [2024-11-22 21:51:43,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:43,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:43,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:43,209 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) [2024-11-22 21:51:43,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:51:43,261 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:43,262 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:43,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:51:43,264 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:43,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:43,396 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:51:43,396 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 40 treesize of output 24 [2024-11-22 21:51:43,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:43,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077362019] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:43,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:43,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 14 [2024-11-22 21:51:43,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528556737] [2024-11-22 21:51:43,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:43,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:51:43,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:43,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:51:43,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:51:43,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-22 21:51:43,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 67 transitions, 326 flow. Second operand has 15 states, 15 states have (on average 14.466666666666667) internal successors, (217), 15 states have internal predecessors, (217), 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) [2024-11-22 21:51:43,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:43,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-22 21:51:43,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:43,928 INFO L124 PetriNetUnfolderBase]: 1510/2850 cut-off events. [2024-11-22 21:51:43,928 INFO L125 PetriNetUnfolderBase]: For 2283/2283 co-relation queries the response was YES. [2024-11-22 21:51:43,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7140 conditions, 2850 events. 1510/2850 cut-off events. For 2283/2283 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 16729 event pairs, 444 based on Foata normal form. 1/2661 useless extension candidates. Maximal degree in co-relation 6658. Up to 975 conditions per place. [2024-11-22 21:51:43,941 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 96 selfloop transitions, 17 changer transitions 19/138 dead transitions. [2024-11-22 21:51:43,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 138 transitions, 831 flow [2024-11-22 21:51:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:51:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:51:43,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-11-22 21:51:43,942 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4697674418604651 [2024-11-22 21:51:43,942 INFO L175 Difference]: Start difference. First operand has 65 places, 67 transitions, 326 flow. Second operand 10 states and 202 transitions. [2024-11-22 21:51:43,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 138 transitions, 831 flow [2024-11-22 21:51:43,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 138 transitions, 828 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:43,950 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 405 flow [2024-11-22 21:51:43,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=405, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-11-22 21:51:43,951 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-11-22 21:51:43,951 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 405 flow [2024-11-22 21:51:43,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 14.466666666666667) internal successors, (217), 15 states have internal predecessors, (217), 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) [2024-11-22 21:51:43,951 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:43,952 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:43,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:51:44,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:44,155 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:44,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:44,156 INFO L85 PathProgramCache]: Analyzing trace with hash 78307836, now seen corresponding path program 3 times [2024-11-22 21:51:44,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:44,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559394153] [2024-11-22 21:51:44,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:51:44,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:44,177 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 21:51:44,178 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 21:51:44,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:44,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559394153] [2024-11-22 21:51:44,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559394153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:44,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096105636] [2024-11-22 21:51:44,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:51:44,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:44,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:44,223 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) [2024-11-22 21:51:44,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:51:44,284 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 21:51:44,285 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:44,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-22 21:51:44,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 21:51:44,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:44,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096105636] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:44,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:44,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4] total 6 [2024-11-22 21:51:44,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824669073] [2024-11-22 21:51:44,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:44,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:51:44,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:44,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:51:44,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:51:44,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-22 21:51:44,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 405 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2024-11-22 21:51:44,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:44,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-22 21:51:44,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:44,726 INFO L124 PetriNetUnfolderBase]: 2374/4576 cut-off events. [2024-11-22 21:51:44,727 INFO L125 PetriNetUnfolderBase]: For 4617/4617 co-relation queries the response was YES. [2024-11-22 21:51:44,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11619 conditions, 4576 events. 2374/4576 cut-off events. For 4617/4617 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 29544 event pairs, 882 based on Foata normal form. 38/4326 useless extension candidates. Maximal degree in co-relation 11083. Up to 2031 conditions per place. [2024-11-22 21:51:44,746 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 88 selfloop transitions, 23 changer transitions 0/117 dead transitions. [2024-11-22 21:51:44,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 117 transitions, 873 flow [2024-11-22 21:51:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-11-22 21:51:44,747 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5406976744186046 [2024-11-22 21:51:44,747 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 405 flow. Second operand 4 states and 93 transitions. [2024-11-22 21:51:44,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 117 transitions, 873 flow [2024-11-22 21:51:44,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 117 transitions, 812 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-11-22 21:51:44,756 INFO L231 Difference]: Finished difference. Result has 72 places, 91 transitions, 610 flow [2024-11-22 21:51:44,756 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=610, PETRI_PLACES=72, PETRI_TRANSITIONS=91} [2024-11-22 21:51:44,757 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-11-22 21:51:44,757 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 91 transitions, 610 flow [2024-11-22 21:51:44,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2024-11-22 21:51:44,757 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:44,757 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:44,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:51:44,958 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,SelfDestructingSolverStorable11 [2024-11-22 21:51:44,958 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:44,958 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:44,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1809442933, now seen corresponding path program 4 times [2024-11-22 21:51:44,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:44,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438956628] [2024-11-22 21:51:44,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:51:44,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:44,975 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:51:44,975 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:45,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:45,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438956628] [2024-11-22 21:51:45,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438956628] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:45,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:45,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:51:45,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454816614] [2024-11-22 21:51:45,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:45,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:45,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:45,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:45,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:45,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 43 [2024-11-22 21:51:45,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 91 transitions, 610 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-11-22 21:51:45,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:45,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 43 [2024-11-22 21:51:45,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:45,410 INFO L124 PetriNetUnfolderBase]: 3037/5277 cut-off events. [2024-11-22 21:51:45,411 INFO L125 PetriNetUnfolderBase]: For 6373/6373 co-relation queries the response was YES. [2024-11-22 21:51:45,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14563 conditions, 5277 events. 3037/5277 cut-off events. For 6373/6373 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 29729 event pairs, 542 based on Foata normal form. 275/5151 useless extension candidates. Maximal degree in co-relation 14484. Up to 2597 conditions per place. [2024-11-22 21:51:45,432 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 88 selfloop transitions, 4 changer transitions 4/98 dead transitions. [2024-11-22 21:51:45,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 858 flow [2024-11-22 21:51:45,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:45,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:45,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-22 21:51:45,433 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-11-22 21:51:45,433 INFO L175 Difference]: Start difference. First operand has 72 places, 91 transitions, 610 flow. Second operand 4 states and 76 transitions. [2024-11-22 21:51:45,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 858 flow [2024-11-22 21:51:45,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 832 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:45,443 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 449 flow [2024-11-22 21:51:45,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=449, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-11-22 21:51:45,443 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 30 predicate places. [2024-11-22 21:51:45,443 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 449 flow [2024-11-22 21:51:45,444 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 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) [2024-11-22 21:51:45,444 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:45,444 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:45,444 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-22 21:51:45,444 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:45,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:45,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1001308381, now seen corresponding path program 1 times [2024-11-22 21:51:45,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:45,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936287642] [2024-11-22 21:51:45,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:45,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:46,015 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:46,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:46,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936287642] [2024-11-22 21:51:46,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936287642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:46,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366539457] [2024-11-22 21:51:46,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:46,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:46,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:46,018 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) [2024-11-22 21:51:46,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:51:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:46,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 21:51:46,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:46,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2024-11-22 21:51:46,414 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-22 21:51:46,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-11-22 21:51:46,433 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:46,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:47,099 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 116 treesize of output 104 [2024-11-22 21:51:47,125 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-22 21:51:47,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 232 treesize of output 196 [2024-11-22 21:51:47,785 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:47,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366539457] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:47,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:47,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2024-11-22 21:51:47,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385593567] [2024-11-22 21:51:47,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:47,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-22 21:51:47,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:47,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-22 21:51:47,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2024-11-22 21:51:47,876 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-22 21:51:47,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 449 flow. Second operand has 30 states, 30 states have (on average 12.9) internal successors, (387), 30 states have internal predecessors, (387), 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) [2024-11-22 21:51:47,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:47,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-22 21:51:47,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:51,953 INFO L124 PetriNetUnfolderBase]: 5854/11234 cut-off events. [2024-11-22 21:51:51,953 INFO L125 PetriNetUnfolderBase]: For 16241/16253 co-relation queries the response was YES. [2024-11-22 21:51:51,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31276 conditions, 11234 events. 5854/11234 cut-off events. For 16241/16253 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 79116 event pairs, 948 based on Foata normal form. 85/10548 useless extension candidates. Maximal degree in co-relation 26234. Up to 1885 conditions per place. [2024-11-22 21:51:51,995 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 347 selfloop transitions, 115 changer transitions 111/580 dead transitions. [2024-11-22 21:51:51,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 580 transitions, 3642 flow [2024-11-22 21:51:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-22 21:51:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-11-22 21:51:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 1056 transitions. [2024-11-22 21:51:51,998 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48153214774281805 [2024-11-22 21:51:51,998 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 449 flow. Second operand 51 states and 1056 transitions. [2024-11-22 21:51:51,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 580 transitions, 3642 flow [2024-11-22 21:51:52,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 580 transitions, 3632 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:52,016 INFO L231 Difference]: Finished difference. Result has 135 places, 185 transitions, 1864 flow [2024-11-22 21:51:52,017 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=1864, PETRI_PLACES=135, PETRI_TRANSITIONS=185} [2024-11-22 21:51:52,017 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-11-22 21:51:52,017 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 185 transitions, 1864 flow [2024-11-22 21:51:52,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 12.9) internal successors, (387), 30 states have internal predecessors, (387), 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) [2024-11-22 21:51:52,018 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:52,018 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:52,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:51:52,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:52,222 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:52,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:52,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1831512565, now seen corresponding path program 2 times [2024-11-22 21:51:52,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:52,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484406341] [2024-11-22 21:51:52,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:52,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:52,245 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:52,248 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:52,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:52,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484406341] [2024-11-22 21:51:52,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484406341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:52,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984487176] [2024-11-22 21:51:52,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:52,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:52,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:52,989 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) [2024-11-22 21:51:52,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:51:53,038 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:53,039 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:53,039 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 21:51:53,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:53,427 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-11-22 21:51:53,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-11-22 21:51:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:53,436 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:53,667 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-22 21:51:53,668 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 74 treesize of output 60 [2024-11-22 21:51:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:54,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984487176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:54,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:54,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2024-11-22 21:51:54,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198283007] [2024-11-22 21:51:54,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:54,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-22 21:51:54,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:54,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-22 21:51:54,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2024-11-22 21:51:54,239 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-22 21:51:54,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 185 transitions, 1864 flow. Second operand has 31 states, 31 states have (on average 12.903225806451612) internal successors, (400), 31 states have internal predecessors, (400), 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) [2024-11-22 21:51:54,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:54,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-22 21:51:54,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:03,884 INFO L124 PetriNetUnfolderBase]: 27214/52235 cut-off events. [2024-11-22 21:52:03,885 INFO L125 PetriNetUnfolderBase]: For 135227/135227 co-relation queries the response was YES. [2024-11-22 21:52:04,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156642 conditions, 52235 events. 27214/52235 cut-off events. For 135227/135227 co-relation queries the response was YES. Maximal size of possible extension queue 842. Compared 451861 event pairs, 3291 based on Foata normal form. 356/49122 useless extension candidates. Maximal degree in co-relation 151645. Up to 8645 conditions per place. [2024-11-22 21:52:04,230 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 788 selfloop transitions, 679 changer transitions 242/1716 dead transitions. [2024-11-22 21:52:04,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 1716 transitions, 16207 flow [2024-11-22 21:52:04,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2024-11-22 21:52:04,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2024-11-22 21:52:04,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 1886 transitions. [2024-11-22 21:52:04,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5160054719562244 [2024-11-22 21:52:04,233 INFO L175 Difference]: Start difference. First operand has 135 places, 185 transitions, 1864 flow. Second operand 85 states and 1886 transitions. [2024-11-22 21:52:04,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 1716 transitions, 16207 flow [2024-11-22 21:52:04,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 1716 transitions, 12907 flow, removed 1641 selfloop flow, removed 6 redundant places. [2024-11-22 21:52:04,627 INFO L231 Difference]: Finished difference. Result has 262 places, 816 transitions, 9230 flow [2024-11-22 21:52:04,628 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1337, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=9230, PETRI_PLACES=262, PETRI_TRANSITIONS=816} [2024-11-22 21:52:04,628 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-11-22 21:52:04,628 INFO L471 AbstractCegarLoop]: Abstraction has has 262 places, 816 transitions, 9230 flow [2024-11-22 21:52:04,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 12.903225806451612) internal successors, (400), 31 states have internal predecessors, (400), 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) [2024-11-22 21:52:04,629 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:04,629 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:04,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:04,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:04,829 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:52:04,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1766859919, now seen corresponding path program 3 times [2024-11-22 21:52:04,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:04,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279209589] [2024-11-22 21:52:04,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:52:04,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:04,858 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 21:52:04,858 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:05,599 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:05,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:05,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279209589] [2024-11-22 21:52:05,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279209589] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:05,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57335020] [2024-11-22 21:52:05,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:52:05,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:05,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:05,602 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) [2024-11-22 21:52:05,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:52:05,665 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 21:52:05,665 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:05,666 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-22 21:52:05,668 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:06,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:52:06,047 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 21:52:06,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:52:06,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-11-22 21:52:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:06,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:06,272 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 21:52:06,273 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 21:52:06,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:52:06,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 52 [2024-11-22 21:52:06,730 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:06,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57335020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:06,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:06,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2024-11-22 21:52:06,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134253749] [2024-11-22 21:52:06,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:06,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-22 21:52:06,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:06,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-22 21:52:06,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2024-11-22 21:52:06,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-22 21:52:06,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 816 transitions, 9230 flow. Second operand has 29 states, 29 states have (on average 13.10344827586207) internal successors, (380), 29 states have internal predecessors, (380), 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) [2024-11-22 21:52:06,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:06,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-22 21:52:06,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:31,907 INFO L124 PetriNetUnfolderBase]: 53813/103643 cut-off events. [2024-11-22 21:52:31,908 INFO L125 PetriNetUnfolderBase]: For 1247951/1247951 co-relation queries the response was YES. [2024-11-22 21:52:33,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381563 conditions, 103643 events. 53813/103643 cut-off events. For 1247951/1247951 co-relation queries the response was YES. Maximal size of possible extension queue 1773. Compared 1005663 event pairs, 5923 based on Foata normal form. 94/96913 useless extension candidates. Maximal degree in co-relation 376329. Up to 17025 conditions per place. [2024-11-22 21:52:33,523 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 400 selfloop transitions, 1977 changer transitions 140/2524 dead transitions. [2024-11-22 21:52:33,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 2524 transitions, 33731 flow [2024-11-22 21:52:33,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-22 21:52:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-11-22 21:52:33,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1111 transitions. [2024-11-22 21:52:33,526 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4784668389319552 [2024-11-22 21:52:33,526 INFO L175 Difference]: Start difference. First operand has 262 places, 816 transitions, 9230 flow. Second operand 54 states and 1111 transitions. [2024-11-22 21:52:33,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 2524 transitions, 33731 flow [2024-11-22 21:52:44,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 2524 transitions, 27252 flow, removed 3222 selfloop flow, removed 13 redundant places. [2024-11-22 21:52:44,416 INFO L231 Difference]: Finished difference. Result has 313 places, 2091 transitions, 25787 flow [2024-11-22 21:52:44,416 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=7356, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=814, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=732, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=25787, PETRI_PLACES=313, PETRI_TRANSITIONS=2091} [2024-11-22 21:52:44,416 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-11-22 21:52:44,417 INFO L471 AbstractCegarLoop]: Abstraction has has 313 places, 2091 transitions, 25787 flow [2024-11-22 21:52:44,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.10344827586207) internal successors, (380), 29 states have internal predecessors, (380), 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) [2024-11-22 21:52:44,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:44,417 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:44,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:44,617 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,SelfDestructingSolverStorable15 [2024-11-22 21:52:44,618 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:52:44,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:44,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2137450404, now seen corresponding path program 4 times [2024-11-22 21:52:44,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:44,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746818113] [2024-11-22 21:52:44,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:52:44,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:44,630 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:52:44,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:44,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:44,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746818113] [2024-11-22 21:52:44,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746818113] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:44,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501948997] [2024-11-22 21:52:44,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:52:44,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:44,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:44,822 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) [2024-11-22 21:52:44,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:52:44,886 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:52:44,887 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:44,888 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 21:52:44,889 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:45,027 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:52:45,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:45,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:52:45,151 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 75 treesize of output 60 [2024-11-22 21:52:45,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:45,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501948997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:45,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:45,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2024-11-22 21:52:45,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781323011] [2024-11-22 21:52:45,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:45,248 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:52:45,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:52:45,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:52:45,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-11-22 21:52:45,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 2091 transitions, 25787 flow. Second operand has 17 states, 17 states have (on average 14.941176470588236) internal successors, (254), 17 states have internal predecessors, (254), 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) [2024-11-22 21:52:45,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:45,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-11-22 21:52:45,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand