./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:45:17,799 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:45:17,883 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:45:17,888 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:45:17,889 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:45:17,928 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:45:17,930 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:45:17,931 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:45:17,931 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:45:17,933 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:45:17,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:45:17,934 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:45:17,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:45:17,935 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:45:17,936 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:45:17,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:45:17,936 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:45:17,937 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:45:17,937 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:45:17,941 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:45:17,942 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:45:17,942 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:45:17,945 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:45:17,945 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:45:17,945 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:45:17,946 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:45:17,946 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:45:17,946 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:45:17,946 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:45:17,947 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:45:17,947 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:45:17,947 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:45:17,947 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:45:17,947 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:45:17,948 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:45:17,948 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:45:17,948 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:45:17,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:45:17,950 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:45:17,950 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:45:17,950 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:45:17,951 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:45:17,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3298e0ac573b72ea1dd21021e341a1c4e9f42cf513c1ea24a79ab2c37c412bc [2024-11-19 09:45:18,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:45:18,247 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:45:18,251 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:45:18,252 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:45:18,253 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:45:18,254 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2024-11-19 09:45:19,831 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:45:20,033 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:45:20,037 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-name-comparator-symm.wvr.c [2024-11-19 09:45:20,046 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a0def8c7/f83df0e362794207bfa5de5295e0641c/FLAG20c46ca07 [2024-11-19 09:45:20,060 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a0def8c7/f83df0e362794207bfa5de5295e0641c [2024-11-19 09:45:20,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:45:20,064 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:45:20,065 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:45:20,065 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:45:20,071 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:45:20,072 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,073 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f36343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20, skipping insertion in model container [2024-11-19 09:45:20,073 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,105 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:45:20,365 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:45:20,369 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:45:20,381 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:45:20,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:45:20,443 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:45:20,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20 WrapperNode [2024-11-19 09:45:20,444 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:45:20,445 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:45:20,445 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:45:20,445 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:45:20,452 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,462 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,491 INFO L138 Inliner]: procedures = 24, calls = 25, calls flagged for inlining = 15, calls inlined = 17, statements flattened = 221 [2024-11-19 09:45:20,491 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:45:20,494 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:45:20,494 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:45:20,495 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:45:20,505 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,508 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,524 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2024-11-19 09:45:20,525 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,525 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,533 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,541 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,545 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,546 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,550 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:45:20,551 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:45:20,551 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:45:20,551 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:45:20,552 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (1/1) ... [2024-11-19 09:45:20,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:45:20,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:20,586 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) [2024-11-19 09:45:20,588 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 [2024-11-19 09:45:20,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:45:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:45:20,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:45:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:45:20,635 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:45:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:45:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:45:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:45:20,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:45:20,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:45:20,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:45:20,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:45:20,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:45:20,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:45:20,638 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:45:20,746 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:45:20,748 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:45:21,123 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:45:21,123 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:45:21,443 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:45:21,444 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 09:45:21,444 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:45:21 BoogieIcfgContainer [2024-11-19 09:45:21,444 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:45:21,447 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:45:21,447 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:45:21,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:45:21,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:45:20" (1/3) ... [2024-11-19 09:45:21,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234b31d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:45:21, skipping insertion in model container [2024-11-19 09:45:21,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:45:20" (2/3) ... [2024-11-19 09:45:21,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234b31d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:45:21, skipping insertion in model container [2024-11-19 09:45:21,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:45:21" (3/3) ... [2024-11-19 09:45:21,455 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-symm.wvr.c [2024-11-19 09:45:21,475 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:45:21,475 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-11-19 09:45:21,475 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:45:21,546 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:45:21,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 88 flow [2024-11-19 09:45:21,618 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-11-19 09:45:21,620 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:45:21,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 5/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-19 09:45:21,625 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 37 transitions, 88 flow [2024-11-19 09:45:21,630 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 34 transitions, 80 flow [2024-11-19 09:45:21,641 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:45:21,650 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;@21706c37, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:45:21,651 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-19 09:45:21,657 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:45:21,660 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:45:21,660 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:45:21,660 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:21,661 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:45:21,662 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:21,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:21,668 INFO L85 PathProgramCache]: Analyzing trace with hash 683369, now seen corresponding path program 1 times [2024-11-19 09:45:21,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:21,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346904390] [2024-11-19 09:45:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:21,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:21,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:21,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:21,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346904390] [2024-11-19 09:45:21,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346904390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:22,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:22,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:45:22,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919629815] [2024-11-19 09:45:22,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:22,012 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:45:22,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:22,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:45:22,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:45:22,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-19 09:45:22,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 80 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) [2024-11-19 09:45:22,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:22,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-19 09:45:22,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:22,217 INFO L124 PetriNetUnfolderBase]: 128/255 cut-off events. [2024-11-19 09:45:22,217 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-19 09:45:22,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 503 conditions, 255 events. 128/255 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 906 event pairs, 100 based on Foata normal form. 1/213 useless extension candidates. Maximal degree in co-relation 450. Up to 221 conditions per place. [2024-11-19 09:45:22,223 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 21 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-11-19 09:45:22,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 116 flow [2024-11-19 09:45:22,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:45:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:45:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-11-19 09:45:22,237 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2024-11-19 09:45:22,239 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 80 flow. Second operand 3 states and 54 transitions. [2024-11-19 09:45:22,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 116 flow [2024-11-19 09:45:22,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:22,246 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2024-11-19 09:45:22,248 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-11-19 09:45:22,252 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2024-11-19 09:45:22,253 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2024-11-19 09:45:22,253 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) [2024-11-19 09:45:22,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:22,253 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:45:22,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:45:22,254 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:22,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:22,255 INFO L85 PathProgramCache]: Analyzing trace with hash 683370, now seen corresponding path program 1 times [2024-11-19 09:45:22,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:22,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615718781] [2024-11-19 09:45:22,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:22,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:22,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:22,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615718781] [2024-11-19 09:45:22,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615718781] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:22,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:22,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:45:22,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649976032] [2024-11-19 09:45:22,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:22,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:45:22,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:22,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:45:22,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:45:22,571 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-19 09:45:22,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 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) [2024-11-19 09:45:22,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:22,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-19 09:45:22,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:22,707 INFO L124 PetriNetUnfolderBase]: 129/258 cut-off events. [2024-11-19 09:45:22,707 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 09:45:22,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 498 conditions, 258 events. 129/258 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 928 event pairs, 100 based on Foata normal form. 0/215 useless extension candidates. Maximal degree in co-relation 476. Up to 226 conditions per place. [2024-11-19 09:45:22,710 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 24 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-11-19 09:45:22,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 128 flow [2024-11-19 09:45:22,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:45:22,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:45:22,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-11-19 09:45:22,714 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2024-11-19 09:45:22,714 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 3 states and 55 transitions. [2024-11-19 09:45:22,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 128 flow [2024-11-19 09:45:22,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 32 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:45:22,717 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 81 flow [2024-11-19 09:45:22,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2024-11-19 09:45:22,719 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2024-11-19 09:45:22,719 INFO L471 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 81 flow [2024-11-19 09:45:22,720 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) [2024-11-19 09:45:22,720 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:22,720 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:45:22,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:45:22,720 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:22,721 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:22,721 INFO L85 PathProgramCache]: Analyzing trace with hash 656739811, now seen corresponding path program 1 times [2024-11-19 09:45:22,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:22,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820855567] [2024-11-19 09:45:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:22,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:22,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:22,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820855567] [2024-11-19 09:45:22,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820855567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:22,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730889604] [2024-11-19 09:45:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:22,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:22,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:22,971 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) [2024-11-19 09:45:22,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:45:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:23,056 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:45:23,060 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:23,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:45:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:23,182 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:23,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730889604] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:23,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:23,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-19 09:45:23,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43186053] [2024-11-19 09:45:23,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:23,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:45:23,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:23,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:45:23,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:45:23,336 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-19 09:45:23,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 81 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-11-19 09:45:23,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:23,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-19 09:45:23,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:23,535 INFO L124 PetriNetUnfolderBase]: 129/262 cut-off events. [2024-11-19 09:45:23,536 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 09:45:23,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 262 events. 129/262 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 928 event pairs, 100 based on Foata normal form. 2/221 useless extension candidates. Maximal degree in co-relation 500. Up to 226 conditions per place. [2024-11-19 09:45:23,538 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 26 selfloop transitions, 5 changer transitions 0/36 dead transitions. [2024-11-19 09:45:23,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 36 transitions, 156 flow [2024-11-19 09:45:23,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:23,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:23,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 80 transitions. [2024-11-19 09:45:23,543 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43243243243243246 [2024-11-19 09:45:23,543 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 81 flow. Second operand 5 states and 80 transitions. [2024-11-19 09:45:23,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 36 transitions, 156 flow [2024-11-19 09:45:23,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 36 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:45:23,545 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 111 flow [2024-11-19 09:45:23,546 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=111, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-11-19 09:45:23,547 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-11-19 09:45:23,547 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 111 flow [2024-11-19 09:45:23,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 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) [2024-11-19 09:45:23,548 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:23,548 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1] [2024-11-19 09:45:23,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:23,750 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 [2024-11-19 09:45:23,750 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:23,751 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:23,751 INFO L85 PathProgramCache]: Analyzing trace with hash -779276267, now seen corresponding path program 2 times [2024-11-19 09:45:23,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:23,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974393184] [2024-11-19 09:45:23,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:23,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:23,775 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:23,775 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:23,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:23,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974393184] [2024-11-19 09:45:23,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974393184] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:23,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:23,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:45:23,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647094520] [2024-11-19 09:45:23,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:23,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:45:23,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:45:23,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:45:23,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:23,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 111 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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) [2024-11-19 09:45:23,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:23,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:23,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:23,944 INFO L124 PetriNetUnfolderBase]: 128/259 cut-off events. [2024-11-19 09:45:23,945 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-19 09:45:23,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516 conditions, 259 events. 128/259 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 909 event pairs, 100 based on Foata normal form. 1/218 useless extension candidates. Maximal degree in co-relation 488. Up to 222 conditions per place. [2024-11-19 09:45:23,947 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2024-11-19 09:45:23,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 33 transitions, 157 flow [2024-11-19 09:45:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 89 transitions. [2024-11-19 09:45:23,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4009009009009009 [2024-11-19 09:45:23,949 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 111 flow. Second operand 6 states and 89 transitions. [2024-11-19 09:45:23,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 33 transitions, 157 flow [2024-11-19 09:45:23,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 33 transitions, 146 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-19 09:45:23,951 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 102 flow [2024-11-19 09:45:23,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2024-11-19 09:45:23,952 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2024-11-19 09:45:23,952 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 102 flow [2024-11-19 09:45:23,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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) [2024-11-19 09:45:23,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:23,953 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:23,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:45:23,953 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:23,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:23,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1506558022, now seen corresponding path program 1 times [2024-11-19 09:45:23,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:23,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18189422] [2024-11-19 09:45:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:23,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:24,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:24,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:24,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18189422] [2024-11-19 09:45:24,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18189422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:24,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272103188] [2024-11-19 09:45:24,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:24,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:24,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:24,040 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) [2024-11-19 09:45:24,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:45:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:24,119 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:45:24,120 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:24,171 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:24,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272103188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:24,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:24,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-19 09:45:24,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052401770] [2024-11-19 09:45:24,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:24,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:45:24,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:24,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:45:24,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:45:24,210 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:24,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 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) [2024-11-19 09:45:24,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:24,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:24,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:24,357 INFO L124 PetriNetUnfolderBase]: 127/258 cut-off events. [2024-11-19 09:45:24,358 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-19 09:45:24,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 258 events. 127/258 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 909 event pairs, 100 based on Foata normal form. 1/217 useless extension candidates. Maximal degree in co-relation 476. Up to 222 conditions per place. [2024-11-19 09:45:24,360 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 23 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-11-19 09:45:24,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 32 transitions, 158 flow [2024-11-19 09:45:24,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:24,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:24,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-11-19 09:45:24,362 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42162162162162165 [2024-11-19 09:45:24,362 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 102 flow. Second operand 5 states and 78 transitions. [2024-11-19 09:45:24,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 32 transitions, 158 flow [2024-11-19 09:45:24,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 32 transitions, 138 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-19 09:45:24,364 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 84 flow [2024-11-19 09:45:24,364 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=84, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2024-11-19 09:45:24,365 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-11-19 09:45:24,365 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 84 flow [2024-11-19 09:45:24,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 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) [2024-11-19 09:45:24,365 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:24,365 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:24,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:45:24,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:24,567 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:24,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:24,567 INFO L85 PathProgramCache]: Analyzing trace with hash -318318797, now seen corresponding path program 2 times [2024-11-19 09:45:24,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:24,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769058205] [2024-11-19 09:45:24,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:24,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:24,582 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:45:24,582 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:24,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:24,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769058205] [2024-11-19 09:45:24,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769058205] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:24,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:24,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:45:24,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075481554] [2024-11-19 09:45:24,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:24,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:45:24,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:24,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:45:24,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:45:24,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-19 09:45:24,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 84 flow. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2024-11-19 09:45:24,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:24,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-19 09:45:24,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:24,908 INFO L124 PetriNetUnfolderBase]: 253/485 cut-off events. [2024-11-19 09:45:24,908 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:45:24,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 485 events. 253/485 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2077 event pairs, 118 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 930. Up to 254 conditions per place. [2024-11-19 09:45:24,911 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 39 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-19 09:45:24,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 47 transitions, 207 flow [2024-11-19 09:45:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:24,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-11-19 09:45:24,913 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4702702702702703 [2024-11-19 09:45:24,913 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 84 flow. Second operand 5 states and 87 transitions. [2024-11-19 09:45:24,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 47 transitions, 207 flow [2024-11-19 09:45:24,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:24,915 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 92 flow [2024-11-19 09:45:24,915 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=92, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2024-11-19 09:45:24,916 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 2 predicate places. [2024-11-19 09:45:24,916 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 92 flow [2024-11-19 09:45:24,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 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) [2024-11-19 09:45:24,916 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:24,916 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:24,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:45:24,917 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:24,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:24,917 INFO L85 PathProgramCache]: Analyzing trace with hash -318318798, now seen corresponding path program 1 times [2024-11-19 09:45:24,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:24,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782495554] [2024-11-19 09:45:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:24,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:45:24,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:24,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782495554] [2024-11-19 09:45:24,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782495554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:24,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:24,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:45:24,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969102310] [2024-11-19 09:45:24,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:24,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:45:24,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:24,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:45:24,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:45:25,007 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-19 09:45:25,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 92 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) [2024-11-19 09:45:25,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:25,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-19 09:45:25,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:25,128 INFO L124 PetriNetUnfolderBase]: 233/441 cut-off events. [2024-11-19 09:45:25,128 INFO L125 PetriNetUnfolderBase]: For 67/73 co-relation queries the response was YES. [2024-11-19 09:45:25,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 441 events. 233/441 cut-off events. For 67/73 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1717 event pairs, 195 based on Foata normal form. 28/417 useless extension candidates. Maximal degree in co-relation 910. Up to 404 conditions per place. [2024-11-19 09:45:25,131 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 24 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-11-19 09:45:25,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 29 transitions, 140 flow [2024-11-19 09:45:25,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:45:25,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:45:25,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2024-11-19 09:45:25,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3581081081081081 [2024-11-19 09:45:25,133 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 92 flow. Second operand 4 states and 53 transitions. [2024-11-19 09:45:25,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 29 transitions, 140 flow [2024-11-19 09:45:25,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 134 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:45:25,135 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 86 flow [2024-11-19 09:45:25,135 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-11-19 09:45:25,136 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2024-11-19 09:45:25,137 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 86 flow [2024-11-19 09:45:25,137 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) [2024-11-19 09:45:25,137 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:25,138 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:25,138 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:45:25,138 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:25,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:25,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1802868794, now seen corresponding path program 1 times [2024-11-19 09:45:25,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:25,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327916374] [2024-11-19 09:45:25,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:25,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:25,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 09:45:25,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:25,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327916374] [2024-11-19 09:45:25,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327916374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:25,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462534723] [2024-11-19 09:45:25,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:25,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:25,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:25,364 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) [2024-11-19 09:45:25,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:45:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:25,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:45:25,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:25,460 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 [2024-11-19 09:45:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:25,584 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:25,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462534723] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:25,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:45:25,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 6] total 14 [2024-11-19 09:45:25,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555361323] [2024-11-19 09:45:25,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:25,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:45:25,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:25,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:45:25,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-19 09:45:25,831 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-19 09:45:25,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 86 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 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) [2024-11-19 09:45:25,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:25,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-19 09:45:25,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:26,099 INFO L124 PetriNetUnfolderBase]: 443/779 cut-off events. [2024-11-19 09:45:26,100 INFO L125 PetriNetUnfolderBase]: For 88/106 co-relation queries the response was YES. [2024-11-19 09:45:26,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 779 events. 443/779 cut-off events. For 88/106 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3177 event pairs, 228 based on Foata normal form. 0/655 useless extension candidates. Maximal degree in co-relation 1628. Up to 463 conditions per place. [2024-11-19 09:45:26,106 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 39 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-11-19 09:45:26,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 45 transitions, 212 flow [2024-11-19 09:45:26,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-11-19 09:45:26,107 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2024-11-19 09:45:26,107 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 86 flow. Second operand 5 states and 85 transitions. [2024-11-19 09:45:26,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 45 transitions, 212 flow [2024-11-19 09:45:26,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 45 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:45:26,110 INFO L231 Difference]: Finished difference. Result has 39 places, 30 transitions, 99 flow [2024-11-19 09:45:26,110 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=39, PETRI_TRANSITIONS=30} [2024-11-19 09:45:26,111 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2024-11-19 09:45:26,111 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 30 transitions, 99 flow [2024-11-19 09:45:26,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 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) [2024-11-19 09:45:26,112 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:26,112 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:26,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:45:26,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:26,313 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:26,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:26,314 INFO L85 PathProgramCache]: Analyzing trace with hash 253200361, now seen corresponding path program 1 times [2024-11-19 09:45:26,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:26,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033535745] [2024-11-19 09:45:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:26,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:26,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 09:45:26,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:26,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033535745] [2024-11-19 09:45:26,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033535745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:26,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160036277] [2024-11-19 09:45:26,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:26,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:26,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:26,543 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) [2024-11-19 09:45:26,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:45:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:26,630 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 09:45:26,632 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:26,639 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 [2024-11-19 09:45:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:26,763 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:26,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:26,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160036277] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:26,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:26,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2024-11-19 09:45:26,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752939682] [2024-11-19 09:45:26,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:26,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:45:26,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:26,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:45:26,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:45:27,242 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-19 09:45:27,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 30 transitions, 99 flow. Second operand has 19 states, 19 states have (on average 10.157894736842104) internal successors, (193), 19 states have internal predecessors, (193), 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) [2024-11-19 09:45:27,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:27,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-19 09:45:27,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:27,766 INFO L124 PetriNetUnfolderBase]: 815/1423 cut-off events. [2024-11-19 09:45:27,767 INFO L125 PetriNetUnfolderBase]: For 251/293 co-relation queries the response was YES. [2024-11-19 09:45:27,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3214 conditions, 1423 events. 815/1423 cut-off events. For 251/293 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 6634 event pairs, 218 based on Foata normal form. 0/1207 useless extension candidates. Maximal degree in co-relation 3181. Up to 441 conditions per place. [2024-11-19 09:45:27,776 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 75 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2024-11-19 09:45:27,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 85 transitions, 416 flow [2024-11-19 09:45:27,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:45:27,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:45:27,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-11-19 09:45:27,777 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2024-11-19 09:45:27,778 INFO L175 Difference]: Start difference. First operand has 39 places, 30 transitions, 99 flow. Second operand 9 states and 153 transitions. [2024-11-19 09:45:27,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 85 transitions, 416 flow [2024-11-19 09:45:27,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 85 transitions, 404 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:45:27,781 INFO L231 Difference]: Finished difference. Result has 46 places, 32 transitions, 127 flow [2024-11-19 09:45:27,782 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=127, PETRI_PLACES=46, PETRI_TRANSITIONS=32} [2024-11-19 09:45:27,783 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 10 predicate places. [2024-11-19 09:45:27,783 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 32 transitions, 127 flow [2024-11-19 09:45:27,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 10.157894736842104) internal successors, (193), 19 states have internal predecessors, (193), 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) [2024-11-19 09:45:27,784 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:27,784 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:27,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:45:27,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:27,989 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:27,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:27,989 INFO L85 PathProgramCache]: Analyzing trace with hash -697504417, now seen corresponding path program 1 times [2024-11-19 09:45:27,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:27,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059067353] [2024-11-19 09:45:27,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:27,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:28,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 09:45:28,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:28,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059067353] [2024-11-19 09:45:28,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059067353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:28,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422542680] [2024-11-19 09:45:28,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:28,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:28,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:28,231 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) [2024-11-19 09:45:28,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:45:28,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:28,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:45:28,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:28,461 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:28,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:45:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:45:28,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422542680] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:28,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:28,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 17 [2024-11-19 09:45:28,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7185920] [2024-11-19 09:45:28,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:28,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:45:28,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:28,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:45:28,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:45:28,899 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-19 09:45:28,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 32 transitions, 127 flow. Second operand has 19 states, 19 states have (on average 11.368421052631579) internal successors, (216), 19 states have internal predecessors, (216), 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) [2024-11-19 09:45:28,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:28,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-19 09:45:28,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:29,650 INFO L124 PetriNetUnfolderBase]: 1517/2633 cut-off events. [2024-11-19 09:45:29,650 INFO L125 PetriNetUnfolderBase]: For 1056/1094 co-relation queries the response was YES. [2024-11-19 09:45:29,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6133 conditions, 2633 events. 1517/2633 cut-off events. For 1056/1094 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 13156 event pairs, 450 based on Foata normal form. 0/2219 useless extension candidates. Maximal degree in co-relation 6096. Up to 885 conditions per place. [2024-11-19 09:45:29,667 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 77 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-11-19 09:45:29,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 87 transitions, 493 flow [2024-11-19 09:45:29,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:45:29,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:45:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-11-19 09:45:29,669 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46846846846846846 [2024-11-19 09:45:29,669 INFO L175 Difference]: Start difference. First operand has 46 places, 32 transitions, 127 flow. Second operand 9 states and 156 transitions. [2024-11-19 09:45:29,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 87 transitions, 493 flow [2024-11-19 09:45:29,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 87 transitions, 462 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-19 09:45:29,673 INFO L231 Difference]: Finished difference. Result has 51 places, 34 transitions, 148 flow [2024-11-19 09:45:29,673 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=148, PETRI_PLACES=51, PETRI_TRANSITIONS=34} [2024-11-19 09:45:29,674 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 15 predicate places. [2024-11-19 09:45:29,674 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 34 transitions, 148 flow [2024-11-19 09:45:29,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.368421052631579) internal successors, (216), 19 states have internal predecessors, (216), 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) [2024-11-19 09:45:29,675 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:29,675 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-19 09:45:29,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:45:29,875 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,SelfDestructingSolverStorable9 [2024-11-19 09:45:29,876 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:29,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2111202217, now seen corresponding path program 2 times [2024-11-19 09:45:29,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:29,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031113744] [2024-11-19 09:45:29,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:29,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:29,906 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:29,906 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:30,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:30,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031113744] [2024-11-19 09:45:30,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031113744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:30,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205960505] [2024-11-19 09:45:30,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:30,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:30,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:30,258 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) [2024-11-19 09:45:30,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:45:30,344 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:30,344 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:30,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 09:45:30,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:30,402 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:45:30,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205960505] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:30,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:45:30,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2024-11-19 09:45:30,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794649840] [2024-11-19 09:45:30,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:30,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:45:30,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:30,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:45:30,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:45:30,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:30,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 34 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2024-11-19 09:45:30,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:30,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:30,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:30,827 INFO L124 PetriNetUnfolderBase]: 1341/2363 cut-off events. [2024-11-19 09:45:30,827 INFO L125 PetriNetUnfolderBase]: For 1128/1168 co-relation queries the response was YES. [2024-11-19 09:45:30,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5595 conditions, 2363 events. 1341/2363 cut-off events. For 1128/1168 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 12293 event pairs, 20 based on Foata normal form. 0/2055 useless extension candidates. Maximal degree in co-relation 5555. Up to 595 conditions per place. [2024-11-19 09:45:30,843 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 94 selfloop transitions, 4 changer transitions 0/100 dead transitions. [2024-11-19 09:45:30,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 100 transitions, 572 flow [2024-11-19 09:45:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-11-19 09:45:30,845 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6396396396396397 [2024-11-19 09:45:30,845 INFO L175 Difference]: Start difference. First operand has 51 places, 34 transitions, 148 flow. Second operand 6 states and 142 transitions. [2024-11-19 09:45:30,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 100 transitions, 572 flow [2024-11-19 09:45:30,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 100 transitions, 526 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-11-19 09:45:30,851 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 123 flow [2024-11-19 09:45:30,852 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=123, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2024-11-19 09:45:30,853 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-11-19 09:45:30,853 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 123 flow [2024-11-19 09:45:30,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 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) [2024-11-19 09:45:30,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:30,854 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:30,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:45:31,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:31,059 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:31,060 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:31,060 INFO L85 PathProgramCache]: Analyzing trace with hash 159171789, now seen corresponding path program 1 times [2024-11-19 09:45:31,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:31,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131987195] [2024-11-19 09:45:31,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:31,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:31,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:31,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131987195] [2024-11-19 09:45:31,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131987195] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:31,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:31,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:45:31,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433147473] [2024-11-19 09:45:31,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:31,359 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:45:31,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:31,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:45:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:45:31,364 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:31,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 123 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:31,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:31,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:31,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:31,769 INFO L124 PetriNetUnfolderBase]: 1343/2417 cut-off events. [2024-11-19 09:45:31,769 INFO L125 PetriNetUnfolderBase]: For 1125/1125 co-relation queries the response was YES. [2024-11-19 09:45:31,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5781 conditions, 2417 events. 1343/2417 cut-off events. For 1125/1125 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 12495 event pairs, 987 based on Foata normal form. 3/2244 useless extension candidates. Maximal degree in co-relation 5747. Up to 1808 conditions per place. [2024-11-19 09:45:31,783 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 52 selfloop transitions, 3 changer transitions 7/64 dead transitions. [2024-11-19 09:45:31,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 350 flow [2024-11-19 09:45:31,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:31,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:31,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-11-19 09:45:31,785 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5621621621621622 [2024-11-19 09:45:31,786 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 123 flow. Second operand 5 states and 104 transitions. [2024-11-19 09:45:31,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 350 flow [2024-11-19 09:45:31,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 329 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:31,789 INFO L231 Difference]: Finished difference. Result has 50 places, 33 transitions, 136 flow [2024-11-19 09:45:31,789 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=50, PETRI_TRANSITIONS=33} [2024-11-19 09:45:31,790 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 14 predicate places. [2024-11-19 09:45:31,790 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 33 transitions, 136 flow [2024-11-19 09:45:31,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:31,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:31,792 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:31,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 09:45:31,792 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:31,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:31,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1027608845, now seen corresponding path program 2 times [2024-11-19 09:45:31,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:31,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977166232] [2024-11-19 09:45:31,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:31,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:31,818 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:45:31,818 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:32,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:32,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977166232] [2024-11-19 09:45:32,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977166232] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:32,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:32,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:45:32,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311940283] [2024-11-19 09:45:32,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:32,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:45:32,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:32,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:45:32,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:45:32,101 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:32,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 33 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:32,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:32,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:32,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:32,555 INFO L124 PetriNetUnfolderBase]: 1344/2410 cut-off events. [2024-11-19 09:45:32,556 INFO L125 PetriNetUnfolderBase]: For 1587/1596 co-relation queries the response was YES. [2024-11-19 09:45:32,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6162 conditions, 2410 events. 1344/2410 cut-off events. For 1587/1596 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 12955 event pairs, 966 based on Foata normal form. 1/2235 useless extension candidates. Maximal degree in co-relation 6125. Up to 1751 conditions per place. [2024-11-19 09:45:32,572 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 58 selfloop transitions, 3 changer transitions 9/72 dead transitions. [2024-11-19 09:45:32,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 430 flow [2024-11-19 09:45:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-11-19 09:45:32,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5783783783783784 [2024-11-19 09:45:32,574 INFO L175 Difference]: Start difference. First operand has 50 places, 33 transitions, 136 flow. Second operand 5 states and 107 transitions. [2024-11-19 09:45:32,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 430 flow [2024-11-19 09:45:32,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 410 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-19 09:45:32,580 INFO L231 Difference]: Finished difference. Result has 53 places, 34 transitions, 148 flow [2024-11-19 09:45:32,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=53, PETRI_TRANSITIONS=34} [2024-11-19 09:45:32,582 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2024-11-19 09:45:32,582 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 34 transitions, 148 flow [2024-11-19 09:45:32,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:32,582 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:32,583 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:32,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:45:32,583 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:32,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:32,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1568482809, now seen corresponding path program 3 times [2024-11-19 09:45:32,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:32,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645296178] [2024-11-19 09:45:32,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:45:32,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:32,610 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 09:45:32,611 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:32,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:32,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645296178] [2024-11-19 09:45:32,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645296178] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:32,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:32,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:45:32,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673708353] [2024-11-19 09:45:32,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:32,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:45:32,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:45:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:45:32,871 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:32,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 34 transitions, 148 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:32,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:32,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:32,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:33,284 INFO L124 PetriNetUnfolderBase]: 1441/2581 cut-off events. [2024-11-19 09:45:33,284 INFO L125 PetriNetUnfolderBase]: For 1867/1867 co-relation queries the response was YES. [2024-11-19 09:45:33,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7052 conditions, 2581 events. 1441/2581 cut-off events. For 1867/1867 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 13478 event pairs, 993 based on Foata normal form. 3/2584 useless extension candidates. Maximal degree in co-relation 7013. Up to 1839 conditions per place. [2024-11-19 09:45:33,306 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 56 selfloop transitions, 10 changer transitions 5/73 dead transitions. [2024-11-19 09:45:33,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 445 flow [2024-11-19 09:45:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:33,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:33,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-11-19 09:45:33,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-11-19 09:45:33,307 INFO L175 Difference]: Start difference. First operand has 53 places, 34 transitions, 148 flow. Second operand 5 states and 110 transitions. [2024-11-19 09:45:33,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 445 flow [2024-11-19 09:45:33,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 421 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-19 09:45:33,314 INFO L231 Difference]: Finished difference. Result has 56 places, 42 transitions, 235 flow [2024-11-19 09:45:33,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=56, PETRI_TRANSITIONS=42} [2024-11-19 09:45:33,315 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 20 predicate places. [2024-11-19 09:45:33,315 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 42 transitions, 235 flow [2024-11-19 09:45:33,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:33,316 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:33,316 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:33,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:45:33,316 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:33,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1703738957, now seen corresponding path program 4 times [2024-11-19 09:45:33,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:33,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895743364] [2024-11-19 09:45:33,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:45:33,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:33,346 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:45:33,348 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:45:33,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:33,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895743364] [2024-11-19 09:45:33,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895743364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:33,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569463288] [2024-11-19 09:45:33,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:45:33,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:33,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:33,713 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) [2024-11-19 09:45:33,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:45:33,809 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:45:33,810 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:33,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-19 09:45:33,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:34,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:34,087 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:45:34,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569463288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:34,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:45:34,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 10 [2024-11-19 09:45:34,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899311035] [2024-11-19 09:45:34,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:34,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:45:34,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:34,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:45:34,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:45:34,100 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:34,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 42 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:34,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:34,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:34,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:34,526 INFO L124 PetriNetUnfolderBase]: 1502/2680 cut-off events. [2024-11-19 09:45:34,526 INFO L125 PetriNetUnfolderBase]: For 3363/3363 co-relation queries the response was YES. [2024-11-19 09:45:34,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8062 conditions, 2680 events. 1502/2680 cut-off events. For 3363/3363 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 14372 event pairs, 957 based on Foata normal form. 1/2681 useless extension candidates. Maximal degree in co-relation 8021. Up to 1865 conditions per place. [2024-11-19 09:45:34,545 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 70 selfloop transitions, 18 changer transitions 4/94 dead transitions. [2024-11-19 09:45:34,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 672 flow [2024-11-19 09:45:34,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:34,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-11-19 09:45:34,546 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2024-11-19 09:45:34,547 INFO L175 Difference]: Start difference. First operand has 56 places, 42 transitions, 235 flow. Second operand 6 states and 130 transitions. [2024-11-19 09:45:34,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 672 flow [2024-11-19 09:45:34,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 94 transitions, 663 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:45:34,554 INFO L231 Difference]: Finished difference. Result has 64 places, 56 transitions, 426 flow [2024-11-19 09:45:34,554 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=426, PETRI_PLACES=64, PETRI_TRANSITIONS=56} [2024-11-19 09:45:34,554 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 28 predicate places. [2024-11-19 09:45:34,555 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 56 transitions, 426 flow [2024-11-19 09:45:34,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:34,555 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:34,555 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:34,573 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 09:45:34,757 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 [2024-11-19 09:45:34,757 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:34,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:34,758 INFO L85 PathProgramCache]: Analyzing trace with hash -120978433, now seen corresponding path program 2 times [2024-11-19 09:45:34,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:34,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079801691] [2024-11-19 09:45:34,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:34,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:34,775 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:34,775 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:35,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:35,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079801691] [2024-11-19 09:45:35,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079801691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:35,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270491867] [2024-11-19 09:45:35,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:35,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:35,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:35,027 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) [2024-11-19 09:45:35,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:45:35,120 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:35,120 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:35,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-19 09:45:35,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:35,174 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:45:35,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270491867] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:35,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:45:35,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 13 [2024-11-19 09:45:35,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078702670] [2024-11-19 09:45:35,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:35,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:45:35,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:35,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:45:35,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:45:35,180 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:35,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 56 transitions, 426 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:35,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:35,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:35,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:35,592 INFO L124 PetriNetUnfolderBase]: 1391/2480 cut-off events. [2024-11-19 09:45:35,592 INFO L125 PetriNetUnfolderBase]: For 4545/4545 co-relation queries the response was YES. [2024-11-19 09:45:35,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7972 conditions, 2480 events. 1391/2480 cut-off events. For 4545/4545 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 12690 event pairs, 157 based on Foata normal form. 46/2526 useless extension candidates. Maximal degree in co-relation 7927. Up to 698 conditions per place. [2024-11-19 09:45:35,616 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 103 selfloop transitions, 13 changer transitions 1/118 dead transitions. [2024-11-19 09:45:35,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 118 transitions, 1001 flow [2024-11-19 09:45:35,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-11-19 09:45:35,618 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-11-19 09:45:35,618 INFO L175 Difference]: Start difference. First operand has 64 places, 56 transitions, 426 flow. Second operand 6 states and 135 transitions. [2024-11-19 09:45:35,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 118 transitions, 1001 flow [2024-11-19 09:45:35,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 118 transitions, 960 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:35,631 INFO L231 Difference]: Finished difference. Result has 65 places, 53 transitions, 397 flow [2024-11-19 09:45:35,631 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=397, PETRI_PLACES=65, PETRI_TRANSITIONS=53} [2024-11-19 09:45:35,633 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2024-11-19 09:45:35,633 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 53 transitions, 397 flow [2024-11-19 09:45:35,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:45:35,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:35,633 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:35,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:45:35,834 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 [2024-11-19 09:45:35,835 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:35,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:35,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1654398577, now seen corresponding path program 1 times [2024-11-19 09:45:35,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:35,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484236644] [2024-11-19 09:45:35,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:35,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:35,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484236644] [2024-11-19 09:45:35,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484236644] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:35,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656134159] [2024-11-19 09:45:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:35,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:35,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:35,957 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) [2024-11-19 09:45:35,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:45:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:36,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:45:36,061 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:36,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:36,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:36,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656134159] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:36,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:45:36,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-11-19 09:45:36,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253405276] [2024-11-19 09:45:36,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:36,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:45:36,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:36,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:45:36,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:45:36,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:36,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 53 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:36,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:36,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:36,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:36,587 INFO L124 PetriNetUnfolderBase]: 1529/2717 cut-off events. [2024-11-19 09:45:36,588 INFO L125 PetriNetUnfolderBase]: For 4175/4175 co-relation queries the response was YES. [2024-11-19 09:45:36,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8647 conditions, 2717 events. 1529/2717 cut-off events. For 4175/4175 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 14677 event pairs, 62 based on Foata normal form. 33/2750 useless extension candidates. Maximal degree in co-relation 8604. Up to 1510 conditions per place. [2024-11-19 09:45:36,610 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 75 selfloop transitions, 31 changer transitions 3/110 dead transitions. [2024-11-19 09:45:36,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 110 transitions, 933 flow [2024-11-19 09:45:36,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:45:36,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:45:36,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-11-19 09:45:36,611 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.528957528957529 [2024-11-19 09:45:36,611 INFO L175 Difference]: Start difference. First operand has 65 places, 53 transitions, 397 flow. Second operand 7 states and 137 transitions. [2024-11-19 09:45:36,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 110 transitions, 933 flow [2024-11-19 09:45:36,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 110 transitions, 897 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:36,624 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 613 flow [2024-11-19 09:45:36,624 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=613, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-11-19 09:45:36,624 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 35 predicate places. [2024-11-19 09:45:36,625 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 613 flow [2024-11-19 09:45:36,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:36,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:36,625 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:36,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:36,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 09:45:36,826 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:36,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:36,826 INFO L85 PathProgramCache]: Analyzing trace with hash -27287510, now seen corresponding path program 1 times [2024-11-19 09:45:36,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:36,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212693785] [2024-11-19 09:45:36,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:36,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:36,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:36,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:36,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212693785] [2024-11-19 09:45:36,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212693785] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:36,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862573323] [2024-11-19 09:45:36,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:36,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:36,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:36,940 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:36,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:45:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:37,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:45:37,042 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:37,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:37,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862573323] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:37,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:45:37,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2024-11-19 09:45:37,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395890361] [2024-11-19 09:45:37,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:37,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:45:37,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:37,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:45:37,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:45:37,140 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:37,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 613 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:37,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:37,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:37,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:37,585 INFO L124 PetriNetUnfolderBase]: 1658/2936 cut-off events. [2024-11-19 09:45:37,585 INFO L125 PetriNetUnfolderBase]: For 7653/7653 co-relation queries the response was YES. [2024-11-19 09:45:37,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10339 conditions, 2936 events. 1658/2936 cut-off events. For 7653/7653 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 15659 event pairs, 211 based on Foata normal form. 30/2966 useless extension candidates. Maximal degree in co-relation 10292. Up to 1509 conditions per place. [2024-11-19 09:45:37,604 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 83 selfloop transitions, 40 changer transitions 3/127 dead transitions. [2024-11-19 09:45:37,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 127 transitions, 1262 flow [2024-11-19 09:45:37,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:45:37,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:45:37,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-11-19 09:45:37,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5173745173745173 [2024-11-19 09:45:37,605 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 613 flow. Second operand 7 states and 134 transitions. [2024-11-19 09:45:37,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 127 transitions, 1262 flow [2024-11-19 09:45:37,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 127 transitions, 1234 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-11-19 09:45:37,630 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 932 flow [2024-11-19 09:45:37,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=932, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-11-19 09:45:37,631 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 45 predicate places. [2024-11-19 09:45:37,631 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 932 flow [2024-11-19 09:45:37,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:37,631 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:37,631 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:37,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 09:45:37,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 09:45:37,832 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:37,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:37,832 INFO L85 PathProgramCache]: Analyzing trace with hash 162456952, now seen corresponding path program 2 times [2024-11-19 09:45:37,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:37,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704754342] [2024-11-19 09:45:37,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:37,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:37,853 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:37,857 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:37,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:37,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704754342] [2024-11-19 09:45:37,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704754342] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:37,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:37,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:45:37,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656163937] [2024-11-19 09:45:37,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:37,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:45:37,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:45:37,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:45:37,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:37,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 932 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:37,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:37,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:37,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:38,491 INFO L124 PetriNetUnfolderBase]: 1660/2953 cut-off events. [2024-11-19 09:45:38,492 INFO L125 PetriNetUnfolderBase]: For 12642/12642 co-relation queries the response was YES. [2024-11-19 09:45:38,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11393 conditions, 2953 events. 1660/2953 cut-off events. For 12642/12642 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 16285 event pairs, 997 based on Foata normal form. 6/2959 useless extension candidates. Maximal degree in co-relation 11341. Up to 1979 conditions per place. [2024-11-19 09:45:38,516 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 98 selfloop transitions, 17 changer transitions 1/117 dead transitions. [2024-11-19 09:45:38,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 117 transitions, 1306 flow [2024-11-19 09:45:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-11-19 09:45:38,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-11-19 09:45:38,517 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 932 flow. Second operand 5 states and 110 transitions. [2024-11-19 09:45:38,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 117 transitions, 1306 flow [2024-11-19 09:45:38,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 117 transitions, 1278 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-11-19 09:45:38,552 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 943 flow [2024-11-19 09:45:38,553 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=943, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2024-11-19 09:45:38,553 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 50 predicate places. [2024-11-19 09:45:38,553 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 943 flow [2024-11-19 09:45:38,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:38,554 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:38,554 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:38,554 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:45:38,554 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:38,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:38,554 INFO L85 PathProgramCache]: Analyzing trace with hash -2008416708, now seen corresponding path program 3 times [2024-11-19 09:45:38,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:38,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417396901] [2024-11-19 09:45:38,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:45:38,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:38,575 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:45:38,575 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:38,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:38,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417396901] [2024-11-19 09:45:38,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417396901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:38,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:38,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:45:38,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794322325] [2024-11-19 09:45:38,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:38,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:45:38,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:38,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:45:38,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:45:38,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:38,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 943 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:38,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:38,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:38,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:39,087 INFO L124 PetriNetUnfolderBase]: 1780/3145 cut-off events. [2024-11-19 09:45:39,088 INFO L125 PetriNetUnfolderBase]: For 13853/13853 co-relation queries the response was YES. [2024-11-19 09:45:39,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12155 conditions, 3145 events. 1780/3145 cut-off events. For 13853/13853 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 17464 event pairs, 999 based on Foata normal form. 30/3175 useless extension candidates. Maximal degree in co-relation 12101. Up to 1985 conditions per place. [2024-11-19 09:45:39,116 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 91 selfloop transitions, 37 changer transitions 7/136 dead transitions. [2024-11-19 09:45:39,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 136 transitions, 1514 flow [2024-11-19 09:45:39,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:45:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:45:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-11-19 09:45:39,119 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6081081081081081 [2024-11-19 09:45:39,120 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 943 flow. Second operand 6 states and 135 transitions. [2024-11-19 09:45:39,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 136 transitions, 1514 flow [2024-11-19 09:45:39,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 136 transitions, 1471 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 09:45:39,168 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 1213 flow [2024-11-19 09:45:39,168 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1213, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-11-19 09:45:39,169 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 55 predicate places. [2024-11-19 09:45:39,169 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 1213 flow [2024-11-19 09:45:39,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:39,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:39,170 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:39,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 09:45:39,170 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:39,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:39,170 INFO L85 PathProgramCache]: Analyzing trace with hash 636749041, now seen corresponding path program 2 times [2024-11-19 09:45:39,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:39,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779704751] [2024-11-19 09:45:39,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:39,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:39,190 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:39,191 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:39,268 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:39,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:39,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779704751] [2024-11-19 09:45:39,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779704751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:39,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819721920] [2024-11-19 09:45:39,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:39,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:39,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:39,271 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:39,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:45:39,374 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:39,374 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:39,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:45:39,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:39,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:39,457 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:39,519 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:39,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819721920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:39,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:39,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-19 09:45:39,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275827784] [2024-11-19 09:45:39,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:39,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:45:39,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:39,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:45:39,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:45:39,538 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:39,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 1213 flow. Second operand has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 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) [2024-11-19 09:45:39,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:39,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:39,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:40,258 INFO L124 PetriNetUnfolderBase]: 2082/3695 cut-off events. [2024-11-19 09:45:40,259 INFO L125 PetriNetUnfolderBase]: For 17941/17941 co-relation queries the response was YES. [2024-11-19 09:45:40,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14832 conditions, 3695 events. 2082/3695 cut-off events. For 17941/17941 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 21315 event pairs, 310 based on Foata normal form. 33/3728 useless extension candidates. Maximal degree in co-relation 14775. Up to 1245 conditions per place. [2024-11-19 09:45:40,345 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 87 selfloop transitions, 91 changer transitions 6/185 dead transitions. [2024-11-19 09:45:40,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 185 transitions, 2126 flow [2024-11-19 09:45:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:45:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:45:40,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-11-19 09:45:40,346 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5257985257985258 [2024-11-19 09:45:40,347 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 1213 flow. Second operand 11 states and 214 transitions. [2024-11-19 09:45:40,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 185 transitions, 2126 flow [2024-11-19 09:45:40,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 185 transitions, 2085 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-11-19 09:45:40,409 INFO L231 Difference]: Finished difference. Result has 102 places, 128 transitions, 1855 flow [2024-11-19 09:45:40,411 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1180, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1855, PETRI_PLACES=102, PETRI_TRANSITIONS=128} [2024-11-19 09:45:40,412 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 66 predicate places. [2024-11-19 09:45:40,412 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 128 transitions, 1855 flow [2024-11-19 09:45:40,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.7) internal successors, (137), 10 states have internal predecessors, (137), 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) [2024-11-19 09:45:40,412 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:40,412 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:40,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 09:45:40,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-19 09:45:40,613 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:40,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:40,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1456950443, now seen corresponding path program 3 times [2024-11-19 09:45:40,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:40,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801994647] [2024-11-19 09:45:40,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:45:40,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:40,638 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:45:40,638 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:40,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:40,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801994647] [2024-11-19 09:45:40,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801994647] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:40,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:40,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:45:40,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413663038] [2024-11-19 09:45:40,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:40,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:45:40,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:40,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:45:40,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:45:40,718 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:40,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 128 transitions, 1855 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:40,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:40,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:40,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:41,317 INFO L124 PetriNetUnfolderBase]: 2067/3638 cut-off events. [2024-11-19 09:45:41,318 INFO L125 PetriNetUnfolderBase]: For 24262/24262 co-relation queries the response was YES. [2024-11-19 09:45:41,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16116 conditions, 3638 events. 2067/3638 cut-off events. For 24262/24262 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 20871 event pairs, 1273 based on Foata normal form. 2/3640 useless extension candidates. Maximal degree in co-relation 16055. Up to 2509 conditions per place. [2024-11-19 09:45:41,354 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 122 selfloop transitions, 21 changer transitions 6/150 dead transitions. [2024-11-19 09:45:41,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 150 transitions, 2244 flow [2024-11-19 09:45:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-11-19 09:45:41,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5621621621621622 [2024-11-19 09:45:41,356 INFO L175 Difference]: Start difference. First operand has 102 places, 128 transitions, 1855 flow. Second operand 5 states and 104 transitions. [2024-11-19 09:45:41,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 150 transitions, 2244 flow [2024-11-19 09:45:41,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 150 transitions, 2134 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:41,489 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1798 flow [2024-11-19 09:45:41,490 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1745, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1798, PETRI_PLACES=104, PETRI_TRANSITIONS=128} [2024-11-19 09:45:41,490 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 68 predicate places. [2024-11-19 09:45:41,490 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1798 flow [2024-11-19 09:45:41,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:41,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:41,491 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:41,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-19 09:45:41,491 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:41,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:41,492 INFO L85 PathProgramCache]: Analyzing trace with hash 301963538, now seen corresponding path program 4 times [2024-11-19 09:45:41,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:41,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544729438] [2024-11-19 09:45:41,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:45:41,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:41,512 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:45:41,512 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:41,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:41,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544729438] [2024-11-19 09:45:41,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544729438] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:41,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:41,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:45:41,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530421502] [2024-11-19 09:45:41,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:41,611 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:45:41,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:41,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:45:41,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:45:41,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:41,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 1798 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:41,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:41,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:41,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:42,174 INFO L124 PetriNetUnfolderBase]: 2062/3642 cut-off events. [2024-11-19 09:45:42,174 INFO L125 PetriNetUnfolderBase]: For 20726/20726 co-relation queries the response was YES. [2024-11-19 09:45:42,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15340 conditions, 3642 events. 2062/3642 cut-off events. For 20726/20726 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 20599 event pairs, 1182 based on Foata normal form. 6/3648 useless extension candidates. Maximal degree in co-relation 15279. Up to 2250 conditions per place. [2024-11-19 09:45:42,199 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 130 selfloop transitions, 26 changer transitions 1/158 dead transitions. [2024-11-19 09:45:42,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 158 transitions, 2289 flow [2024-11-19 09:45:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-11-19 09:45:42,201 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5837837837837838 [2024-11-19 09:45:42,201 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1798 flow. Second operand 5 states and 108 transitions. [2024-11-19 09:45:42,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 158 transitions, 2289 flow [2024-11-19 09:45:42,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 158 transitions, 2237 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-19 09:45:42,302 INFO L231 Difference]: Finished difference. Result has 106 places, 131 transitions, 1887 flow [2024-11-19 09:45:42,302 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1887, PETRI_PLACES=106, PETRI_TRANSITIONS=131} [2024-11-19 09:45:42,303 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 70 predicate places. [2024-11-19 09:45:42,303 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 131 transitions, 1887 flow [2024-11-19 09:45:42,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:42,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:42,303 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:42,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-19 09:45:42,304 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:42,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:42,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1618543610, now seen corresponding path program 5 times [2024-11-19 09:45:42,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:42,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774161885] [2024-11-19 09:45:42,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:45:42,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:42,334 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 09:45:42,337 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:45:42,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:42,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774161885] [2024-11-19 09:45:42,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774161885] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:42,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876587117] [2024-11-19 09:45:42,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:45:42,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:42,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:42,659 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:42,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:45:42,767 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 09:45:42,767 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:42,769 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:45:42,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:42,842 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:42,843 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:45:42,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876587117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:42,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:45:42,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2024-11-19 09:45:42,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801434081] [2024-11-19 09:45:42,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:42,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:45:42,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:42,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:45:42,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:45:42,849 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:42,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 131 transitions, 1887 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:42,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:42,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:42,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:43,377 INFO L124 PetriNetUnfolderBase]: 2086/3657 cut-off events. [2024-11-19 09:45:43,378 INFO L125 PetriNetUnfolderBase]: For 23166/23166 co-relation queries the response was YES. [2024-11-19 09:45:43,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16113 conditions, 3657 events. 2086/3657 cut-off events. For 23166/23166 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 20506 event pairs, 1058 based on Foata normal form. 30/3687 useless extension candidates. Maximal degree in co-relation 16050. Up to 1995 conditions per place. [2024-11-19 09:45:43,412 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 128 selfloop transitions, 44 changer transitions 9/182 dead transitions. [2024-11-19 09:45:43,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 182 transitions, 2657 flow [2024-11-19 09:45:43,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:45:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:45:43,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-11-19 09:45:43,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-19 09:45:43,414 INFO L175 Difference]: Start difference. First operand has 106 places, 131 transitions, 1887 flow. Second operand 7 states and 148 transitions. [2024-11-19 09:45:43,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 182 transitions, 2657 flow [2024-11-19 09:45:43,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 182 transitions, 2631 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-19 09:45:43,525 INFO L231 Difference]: Finished difference. Result has 114 places, 145 transitions, 2259 flow [2024-11-19 09:45:43,526 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2259, PETRI_PLACES=114, PETRI_TRANSITIONS=145} [2024-11-19 09:45:43,527 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 78 predicate places. [2024-11-19 09:45:43,527 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 145 transitions, 2259 flow [2024-11-19 09:45:43,527 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:43,527 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:43,527 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:43,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 09:45:43,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-19 09:45:43,728 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:43,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:43,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1068478093, now seen corresponding path program 4 times [2024-11-19 09:45:43,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:43,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218651050] [2024-11-19 09:45:43,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:45:43,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:43,747 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:45:43,747 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:43,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:43,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218651050] [2024-11-19 09:45:43,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218651050] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:43,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426846420] [2024-11-19 09:45:43,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:45:43,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:43,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:43,849 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:43,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 09:45:43,961 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:45:43,961 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:43,963 INFO L255 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:45:43,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:44,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:44,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426846420] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:44,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:45:44,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2024-11-19 09:45:44,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989489883] [2024-11-19 09:45:44,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:44,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:45:44,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:44,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:45:44,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:45:44,115 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:44,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 145 transitions, 2259 flow. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:44,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:44,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:44,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:44,577 INFO L124 PetriNetUnfolderBase]: 2024/3535 cut-off events. [2024-11-19 09:45:44,578 INFO L125 PetriNetUnfolderBase]: For 24023/24023 co-relation queries the response was YES. [2024-11-19 09:45:44,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15847 conditions, 3535 events. 2024/3535 cut-off events. For 24023/24023 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 19505 event pairs, 949 based on Foata normal form. 33/3568 useless extension candidates. Maximal degree in co-relation 15781. Up to 1987 conditions per place. [2024-11-19 09:45:44,599 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 93 selfloop transitions, 63 changer transitions 6/163 dead transitions. [2024-11-19 09:45:44,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 163 transitions, 2599 flow [2024-11-19 09:45:44,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:45:44,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:45:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-19 09:45:44,600 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-11-19 09:45:44,600 INFO L175 Difference]: Start difference. First operand has 114 places, 145 transitions, 2259 flow. Second operand 5 states and 105 transitions. [2024-11-19 09:45:44,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 163 transitions, 2599 flow [2024-11-19 09:45:44,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 163 transitions, 2442 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-11-19 09:45:44,704 INFO L231 Difference]: Finished difference. Result has 107 places, 142 transitions, 2174 flow [2024-11-19 09:45:44,704 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2074, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2174, PETRI_PLACES=107, PETRI_TRANSITIONS=142} [2024-11-19 09:45:44,704 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 71 predicate places. [2024-11-19 09:45:44,704 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 142 transitions, 2174 flow [2024-11-19 09:45:44,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 5 states have internal predecessors, (72), 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) [2024-11-19 09:45:44,704 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:44,705 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:44,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:44,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-19 09:45:44,909 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:44,909 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:44,909 INFO L85 PathProgramCache]: Analyzing trace with hash -195013336, now seen corresponding path program 1 times [2024-11-19 09:45:44,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:44,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244672715] [2024-11-19 09:45:44,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:44,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:44,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:45,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:45,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244672715] [2024-11-19 09:45:45,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244672715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:45,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25588563] [2024-11-19 09:45:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:45,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:45,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:45,952 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:45,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 09:45:46,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:46,054 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-19 09:45:46,057 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:46,603 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 183 treesize of output 119 [2024-11-19 09:45:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:46,781 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:48,563 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:45:48,564 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 245 treesize of output 161 [2024-11-19 09:45:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:48,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25588563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:48,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:48,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2024-11-19 09:45:48,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397365803] [2024-11-19 09:45:48,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:48,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 09:45:48,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:48,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 09:45:48,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:45:49,255 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:49,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 142 transitions, 2174 flow. Second operand has 26 states, 26 states have (on average 12.538461538461538) internal successors, (326), 26 states have internal predecessors, (326), 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) [2024-11-19 09:45:49,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:49,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:49,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:54,335 INFO L124 PetriNetUnfolderBase]: 2861/5037 cut-off events. [2024-11-19 09:45:54,335 INFO L125 PetriNetUnfolderBase]: For 29601/29601 co-relation queries the response was YES. [2024-11-19 09:45:54,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22181 conditions, 5037 events. 2861/5037 cut-off events. For 29601/29601 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 30879 event pairs, 549 based on Foata normal form. 8/5045 useless extension candidates. Maximal degree in co-relation 22120. Up to 1046 conditions per place. [2024-11-19 09:45:54,368 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 235 selfloop transitions, 269 changer transitions 37/542 dead transitions. [2024-11-19 09:45:54,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 542 transitions, 6596 flow [2024-11-19 09:45:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-19 09:45:54,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-19 09:45:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 840 transitions. [2024-11-19 09:45:54,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47297297297297297 [2024-11-19 09:45:54,372 INFO L175 Difference]: Start difference. First operand has 107 places, 142 transitions, 2174 flow. Second operand 48 states and 840 transitions. [2024-11-19 09:45:54,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 542 transitions, 6596 flow [2024-11-19 09:45:54,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 542 transitions, 5717 flow, removed 31 selfloop flow, removed 12 redundant places. [2024-11-19 09:45:54,466 INFO L231 Difference]: Finished difference. Result has 157 places, 320 transitions, 4829 flow [2024-11-19 09:45:54,467 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1862, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=4829, PETRI_PLACES=157, PETRI_TRANSITIONS=320} [2024-11-19 09:45:54,467 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 121 predicate places. [2024-11-19 09:45:54,467 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 320 transitions, 4829 flow [2024-11-19 09:45:54,468 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 12.538461538461538) internal successors, (326), 26 states have internal predecessors, (326), 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) [2024-11-19 09:45:54,468 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:54,468 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:45:54,485 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-19 09:45:54,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:54,669 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:45:54,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1396601676, now seen corresponding path program 2 times [2024-11-19 09:45:54,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:54,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955879637] [2024-11-19 09:45:54,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:54,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:54,694 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:54,695 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:55,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:55,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955879637] [2024-11-19 09:45:55,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955879637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:45:55,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377557850] [2024-11-19 09:45:55,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:55,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:45:55,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:45:55,576 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:45:55,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 09:45:55,698 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:45:55,698 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:55,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 09:45:55,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:45:56,243 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 182 treesize of output 118 [2024-11-19 09:45:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:56,569 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:45:58,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:45:58,455 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 284 treesize of output 196 [2024-11-19 09:45:59,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:45:59,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377557850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:45:59,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:45:59,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2024-11-19 09:45:59,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858495330] [2024-11-19 09:45:59,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:45:59,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 09:45:59,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 09:45:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2024-11-19 09:45:59,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:45:59,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 320 transitions, 4829 flow. Second operand has 29 states, 29 states have (on average 12.482758620689655) internal successors, (362), 29 states have internal predecessors, (362), 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) [2024-11-19 09:45:59,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:59,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:45:59,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:03,433 INFO L124 PetriNetUnfolderBase]: 3393/6168 cut-off events. [2024-11-19 09:46:03,433 INFO L125 PetriNetUnfolderBase]: For 40048/40048 co-relation queries the response was YES. [2024-11-19 09:46:03,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29207 conditions, 6168 events. 3393/6168 cut-off events. For 40048/40048 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 40825 event pairs, 979 based on Foata normal form. 14/6182 useless extension candidates. Maximal degree in co-relation 29136. Up to 2472 conditions per place. [2024-11-19 09:46:03,477 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 252 selfloop transitions, 348 changer transitions 46/647 dead transitions. [2024-11-19 09:46:03,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 647 transitions, 8827 flow [2024-11-19 09:46:03,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-19 09:46:03,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-19 09:46:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 724 transitions. [2024-11-19 09:46:03,480 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46589446589446587 [2024-11-19 09:46:03,480 INFO L175 Difference]: Start difference. First operand has 157 places, 320 transitions, 4829 flow. Second operand 42 states and 724 transitions. [2024-11-19 09:46:03,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 647 transitions, 8827 flow [2024-11-19 09:46:03,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 647 transitions, 8334 flow, removed 226 selfloop flow, removed 6 redundant places. [2024-11-19 09:46:03,707 INFO L231 Difference]: Finished difference. Result has 210 places, 454 transitions, 7585 flow [2024-11-19 09:46:03,708 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4547, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=7585, PETRI_PLACES=210, PETRI_TRANSITIONS=454} [2024-11-19 09:46:03,708 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 174 predicate places. [2024-11-19 09:46:03,708 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 454 transitions, 7585 flow [2024-11-19 09:46:03,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 12.482758620689655) internal successors, (362), 29 states have internal predecessors, (362), 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) [2024-11-19 09:46:03,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:03,709 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:03,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 09:46:03,912 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-19 09:46:03,913 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:46:03,913 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:03,913 INFO L85 PathProgramCache]: Analyzing trace with hash -589551178, now seen corresponding path program 3 times [2024-11-19 09:46:03,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:03,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322589873] [2024-11-19 09:46:03,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:46:03,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:03,951 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 09:46:03,952 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:04,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:04,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:04,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322589873] [2024-11-19 09:46:04,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322589873] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:04,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733621883] [2024-11-19 09:46:04,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:46:04,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:04,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:04,665 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:46:04,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 09:46:04,768 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-19 09:46:04,769 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:04,771 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 09:46:04,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:05,090 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 161 treesize of output 105 [2024-11-19 09:46:05,416 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:05,416 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:06,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:46:06,877 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 333 treesize of output 229 [2024-11-19 09:46:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:07,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733621883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:07,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:07,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 29 [2024-11-19 09:46:07,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497396022] [2024-11-19 09:46:07,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:07,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-19 09:46:07,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:07,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-19 09:46:07,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2024-11-19 09:46:07,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:46:07,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 454 transitions, 7585 flow. Second operand has 29 states, 29 states have (on average 12.586206896551724) internal successors, (365), 29 states have internal predecessors, (365), 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) [2024-11-19 09:46:07,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:07,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:46:07,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:11,637 INFO L124 PetriNetUnfolderBase]: 3840/6962 cut-off events. [2024-11-19 09:46:11,637 INFO L125 PetriNetUnfolderBase]: For 71152/71152 co-relation queries the response was YES. [2024-11-19 09:46:11,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41474 conditions, 6962 events. 3840/6962 cut-off events. For 71152/71152 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 47111 event pairs, 1104 based on Foata normal form. 10/6972 useless extension candidates. Maximal degree in co-relation 41386. Up to 2696 conditions per place. [2024-11-19 09:46:11,689 INFO L140 encePairwiseOnDemand]: 24/37 looper letters, 215 selfloop transitions, 444 changer transitions 25/685 dead transitions. [2024-11-19 09:46:11,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 685 transitions, 11487 flow [2024-11-19 09:46:11,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-19 09:46:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-19 09:46:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 549 transitions. [2024-11-19 09:46:11,691 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44963144963144963 [2024-11-19 09:46:11,691 INFO L175 Difference]: Start difference. First operand has 210 places, 454 transitions, 7585 flow. Second operand 33 states and 549 transitions. [2024-11-19 09:46:11,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 685 transitions, 11487 flow [2024-11-19 09:46:12,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 685 transitions, 10865 flow, removed 247 selfloop flow, removed 10 redundant places. [2024-11-19 09:46:12,370 INFO L231 Difference]: Finished difference. Result has 240 places, 562 transitions, 10214 flow [2024-11-19 09:46:12,371 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=7184, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10214, PETRI_PLACES=240, PETRI_TRANSITIONS=562} [2024-11-19 09:46:12,371 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 204 predicate places. [2024-11-19 09:46:12,371 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 562 transitions, 10214 flow [2024-11-19 09:46:12,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 12.586206896551724) internal successors, (365), 29 states have internal predecessors, (365), 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) [2024-11-19 09:46:12,372 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:12,372 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:12,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-19 09:46:12,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-19 09:46:12,572 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:46:12,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:12,573 INFO L85 PathProgramCache]: Analyzing trace with hash -707310932, now seen corresponding path program 4 times [2024-11-19 09:46:12,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:12,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670315125] [2024-11-19 09:46:12,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:46:12,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:12,593 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:46:12,594 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:13,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:13,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670315125] [2024-11-19 09:46:13,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670315125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:13,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984419094] [2024-11-19 09:46:13,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:46:13,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:13,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:13,318 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:46:13,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 09:46:13,432 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:46:13,432 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:13,434 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-19 09:46:13,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:13,871 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 182 treesize of output 118 [2024-11-19 09:46:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:14,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:15,899 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:46:15,899 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 303 treesize of output 215 [2024-11-19 09:46:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:16,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984419094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:16,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:16,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2024-11-19 09:46:16,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91741311] [2024-11-19 09:46:16,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:16,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-19 09:46:16,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:16,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-19 09:46:16,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:46:16,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:46:16,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 562 transitions, 10214 flow. Second operand has 26 states, 26 states have (on average 12.76923076923077) internal successors, (332), 26 states have internal predecessors, (332), 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) [2024-11-19 09:46:16,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:16,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:46:16,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:20,864 INFO L124 PetriNetUnfolderBase]: 4152/7682 cut-off events. [2024-11-19 09:46:20,864 INFO L125 PetriNetUnfolderBase]: For 102646/102646 co-relation queries the response was YES. [2024-11-19 09:46:20,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50487 conditions, 7682 events. 4152/7682 cut-off events. For 102646/102646 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 54053 event pairs, 1057 based on Foata normal form. 12/7694 useless extension candidates. Maximal degree in co-relation 50390. Up to 2685 conditions per place. [2024-11-19 09:46:20,944 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 207 selfloop transitions, 522 changer transitions 33/763 dead transitions. [2024-11-19 09:46:20,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 763 transitions, 13903 flow [2024-11-19 09:46:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 09:46:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-19 09:46:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 555 transitions. [2024-11-19 09:46:20,946 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-11-19 09:46:20,946 INFO L175 Difference]: Start difference. First operand has 240 places, 562 transitions, 10214 flow. Second operand 32 states and 555 transitions. [2024-11-19 09:46:20,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 763 transitions, 13903 flow [2024-11-19 09:46:21,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 763 transitions, 13535 flow, removed 119 selfloop flow, removed 11 redundant places. [2024-11-19 09:46:21,870 INFO L231 Difference]: Finished difference. Result has 268 places, 625 transitions, 12872 flow [2024-11-19 09:46:21,870 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=9951, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=459, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12872, PETRI_PLACES=268, PETRI_TRANSITIONS=625} [2024-11-19 09:46:21,871 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 232 predicate places. [2024-11-19 09:46:21,871 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 625 transitions, 12872 flow [2024-11-19 09:46:21,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 12.76923076923077) internal successors, (332), 26 states have internal predecessors, (332), 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) [2024-11-19 09:46:21,871 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:21,872 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:21,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-19 09:46:22,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-19 09:46:22,072 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:46:22,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:22,073 INFO L85 PathProgramCache]: Analyzing trace with hash -112830000, now seen corresponding path program 5 times [2024-11-19 09:46:22,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:22,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558536816] [2024-11-19 09:46:22,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:46:22,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:22,101 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 09:46:22,101 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:22,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:22,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558536816] [2024-11-19 09:46:22,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558536816] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:22,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357512052] [2024-11-19 09:46:22,721 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:46:22,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:22,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:22,723 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:46:22,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 09:46:22,836 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-19 09:46:22,837 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:22,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 09:46:22,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:23,242 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 203 treesize of output 131 [2024-11-19 09:46:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:23,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:46:25,273 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:46:25,274 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 320 treesize of output 216 [2024-11-19 09:46:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:25,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357512052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:46:25,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:46:25,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 27 [2024-11-19 09:46:25,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340876956] [2024-11-19 09:46:25,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:46:25,900 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-19 09:46:25,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:46:25,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-19 09:46:25,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2024-11-19 09:46:26,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 37 [2024-11-19 09:46:26,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 625 transitions, 12872 flow. Second operand has 27 states, 27 states have (on average 12.37037037037037) internal successors, (334), 27 states have internal predecessors, (334), 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) [2024-11-19 09:46:26,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:46:26,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 37 [2024-11-19 09:46:26,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:46:30,878 INFO L124 PetriNetUnfolderBase]: 4510/8378 cut-off events. [2024-11-19 09:46:30,878 INFO L125 PetriNetUnfolderBase]: For 135953/135953 co-relation queries the response was YES. [2024-11-19 09:46:30,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58955 conditions, 8378 events. 4510/8378 cut-off events. For 135953/135953 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 60719 event pairs, 1304 based on Foata normal form. 10/8388 useless extension candidates. Maximal degree in co-relation 58849. Up to 3656 conditions per place. [2024-11-19 09:46:30,957 INFO L140 encePairwiseOnDemand]: 26/37 looper letters, 262 selfloop transitions, 610 changer transitions 25/898 dead transitions. [2024-11-19 09:46:30,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 898 transitions, 18235 flow [2024-11-19 09:46:30,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-19 09:46:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-19 09:46:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 617 transitions. [2024-11-19 09:46:30,959 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46321321321321324 [2024-11-19 09:46:30,959 INFO L175 Difference]: Start difference. First operand has 268 places, 625 transitions, 12872 flow. Second operand 36 states and 617 transitions. [2024-11-19 09:46:30,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 898 transitions, 18235 flow [2024-11-19 09:46:32,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 898 transitions, 17946 flow, removed 88 selfloop flow, removed 9 redundant places. [2024-11-19 09:46:32,150 INFO L231 Difference]: Finished difference. Result has 302 places, 739 transitions, 17001 flow [2024-11-19 09:46:32,151 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=12632, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=505, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=17001, PETRI_PLACES=302, PETRI_TRANSITIONS=739} [2024-11-19 09:46:32,152 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 266 predicate places. [2024-11-19 09:46:32,152 INFO L471 AbstractCegarLoop]: Abstraction has has 302 places, 739 transitions, 17001 flow [2024-11-19 09:46:32,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 12.37037037037037) internal successors, (334), 27 states have internal predecessors, (334), 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) [2024-11-19 09:46:32,152 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:46:32,152 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:46:32,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-19 09:46:32,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:32,353 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-19 09:46:32,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:46:32,353 INFO L85 PathProgramCache]: Analyzing trace with hash -869891378, now seen corresponding path program 6 times [2024-11-19 09:46:32,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:46:32,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152009128] [2024-11-19 09:46:32,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:46:32,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:46:32,397 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 09:46:32,397 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:33,286 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:33,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:46:33,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152009128] [2024-11-19 09:46:33,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152009128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:46:33,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063350775] [2024-11-19 09:46:33,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-19 09:46:33,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:46:33,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:46:33,289 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:46:33,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-19 09:46:33,400 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-19 09:46:33,401 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:46:33,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-19 09:46:33,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:46:33,949 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 76 [2024-11-19 09:46:34,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:46:34,095 INFO L311 TraceCheckSpWp]: Computing backward predicates...