./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-queue-add-2.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 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:51:29,606 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:51:29,671 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:51:29,676 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:51:29,678 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:51:29,709 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:51:29,709 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:51:29,710 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:51:29,710 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:51:29,711 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:51:29,712 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:51:29,712 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:51:29,713 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:51:29,713 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:51:29,715 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:51:29,715 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:51:29,716 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:51:29,716 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:51:29,716 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:51:29,717 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:51:29,717 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:51:29,718 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:51:29,718 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:51:29,718 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:51:29,719 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:51:29,719 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:51:29,719 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:51:29,720 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:51:29,720 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:51:29,720 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:51:29,721 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:51:29,721 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:51:29,722 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:51:29,722 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:51:29,722 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:51:29,722 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:51:29,723 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:51:29,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:51:29,723 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:51:29,723 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:51:29,724 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:51:29,724 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:51:29,725 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c3fe688d0e9a9929009fc24c8ef56c8fc1bfa15613131b287e178eb7d2f1f1e [2024-11-22 21:51:29,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:51:29,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:51:29,932 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:51:29,933 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:51:29,933 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:51:29,934 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-11-22 21:51:31,163 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:51:31,367 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:51:31,368 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-2.wvr.c [2024-11-22 21:51:31,376 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b319e071/324c232e687a42b894755a0721571403/FLAG8844e2d7d [2024-11-22 21:51:31,764 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b319e071/324c232e687a42b894755a0721571403 [2024-11-22 21:51:31,766 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:51:31,767 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:51:31,768 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:51:31,768 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:51:31,774 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:51:31,775 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:51:31" (1/1) ... [2024-11-22 21:51:31,775 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45f9efdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:31, skipping insertion in model container [2024-11-22 21:51:31,775 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:51:31" (1/1) ... [2024-11-22 21:51:31,792 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:51:31,981 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:51:31,985 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:51:31,993 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:51:32,008 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:51:32,022 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:51:32,022 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32 WrapperNode [2024-11-22 21:51:32,023 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:51:32,024 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:51:32,024 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:51:32,024 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:51:32,029 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (1/1) ... [2024-11-22 21:51:32,035 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (1/1) ... [2024-11-22 21:51:32,056 INFO L138 Inliner]: procedures = 23, calls = 30, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 151 [2024-11-22 21:51:32,056 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:51:32,057 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:51:32,057 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:51:32,057 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:51:32,066 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (1/1) ... [2024-11-22 21:51:32,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (1/1) ... [2024-11-22 21:51:32,071 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (1/1) ... [2024-11-22 21:51:32,083 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-22 21:51:32,083 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (1/1) ... [2024-11-22 21:51:32,083 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (1/1) ... [2024-11-22 21:51:32,088 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (1/1) ... [2024-11-22 21:51:32,094 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (1/1) ... [2024-11-22 21:51:32,095 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (1/1) ... [2024-11-22 21:51:32,096 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (1/1) ... [2024-11-22 21:51:32,098 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:51:32,099 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:51:32,099 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:51:32,099 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:51:32,099 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (1/1) ... [2024-11-22 21:51:32,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:51:32,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:32,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:51:32,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:51:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:51:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:51:32,167 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:51:32,167 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:51:32,168 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:51:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:51:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:51:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:51:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:51:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 21:51:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 21:51:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:51:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:51:32,168 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:51:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:51:32,168 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:51:32,171 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:51:32,262 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:51:32,264 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:51:32,486 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:51:32,487 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:51:32,675 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:51:32,675 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 21:51:32,676 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:51:32 BoogieIcfgContainer [2024-11-22 21:51:32,676 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:51:32,677 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:51:32,677 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:51:32,694 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:51:32,694 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:51:31" (1/3) ... [2024-11-22 21:51:32,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b14964c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:51:32, skipping insertion in model container [2024-11-22 21:51:32,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:32" (2/3) ... [2024-11-22 21:51:32,695 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b14964c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:51:32, skipping insertion in model container [2024-11-22 21:51:32,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:51:32" (3/3) ... [2024-11-22 21:51:32,696 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2024-11-22 21:51:32,710 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:51:32,710 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-22 21:51:32,710 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:51:32,770 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 21:51:32,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 40 transitions, 94 flow [2024-11-22 21:51:32,826 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-11-22 21:51:32,827 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:51:32,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 4/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 80 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-22 21:51:32,832 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 40 transitions, 94 flow [2024-11-22 21:51:32,835 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 86 flow [2024-11-22 21:51:32,842 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:51:32,847 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;@fc2f83e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:51:32,847 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-11-22 21:51:32,850 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:51:32,851 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:51:32,851 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:51:32,851 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:32,851 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:51:32,852 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:32,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:32,856 INFO L85 PathProgramCache]: Analyzing trace with hash 494350, now seen corresponding path program 1 times [2024-11-22 21:51:32,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:32,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406075763] [2024-11-22 21:51:32,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:32,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:32,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:33,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406075763] [2024-11-22 21:51:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406075763] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:33,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:33,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:51:33,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761223668] [2024-11-22 21:51:33,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:33,050 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:33,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:33,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-22 21:51:33,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:33,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:33,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-22 21:51:33,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:33,233 INFO L124 PetriNetUnfolderBase]: 193/366 cut-off events. [2024-11-22 21:51:33,234 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-22 21:51:33,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 737 conditions, 366 events. 193/366 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1753 event pairs, 172 based on Foata normal form. 22/260 useless extension candidates. Maximal degree in co-relation 686. Up to 336 conditions per place. [2024-11-22 21:51:33,239 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 24 selfloop transitions, 2 changer transitions 0/33 dead transitions. [2024-11-22 21:51:33,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 130 flow [2024-11-22 21:51:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:33,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-11-22 21:51:33,248 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-11-22 21:51:33,249 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 86 flow. Second operand 3 states and 59 transitions. [2024-11-22 21:51:33,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 130 flow [2024-11-22 21:51:33,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 122 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:51:33,253 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 74 flow [2024-11-22 21:51:33,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2024-11-22 21:51:33,259 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2024-11-22 21:51:33,259 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 74 flow [2024-11-22 21:51:33,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:33,259 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:33,259 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:51:33,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:51:33,260 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:33,260 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 494351, now seen corresponding path program 1 times [2024-11-22 21:51:33,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:33,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614246013] [2024-11-22 21:51:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:33,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:33,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:33,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614246013] [2024-11-22 21:51:33,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614246013] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:33,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:33,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:33,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693165730] [2024-11-22 21:51:33,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:33,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:33,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:33,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:33,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:33,579 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-22 21:51:33,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:33,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:33,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-22 21:51:33,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:33,721 INFO L124 PetriNetUnfolderBase]: 194/369 cut-off events. [2024-11-22 21:51:33,722 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:51:33,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 369 events. 194/369 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1783 event pairs, 172 based on Foata normal form. 0/241 useless extension candidates. Maximal degree in co-relation 706. Up to 341 conditions per place. [2024-11-22 21:51:33,726 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 26 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-11-22 21:51:33,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 36 transitions, 142 flow [2024-11-22 21:51:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:33,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:33,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-11-22 21:51:33,729 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44375 [2024-11-22 21:51:33,729 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 74 flow. Second operand 4 states and 71 transitions. [2024-11-22 21:51:33,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 36 transitions, 142 flow [2024-11-22 21:51:33,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:33,731 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 97 flow [2024-11-22 21:51:33,732 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=97, PETRI_PLACES=38, PETRI_TRANSITIONS=36} [2024-11-22 21:51:33,732 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2024-11-22 21:51:33,733 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 97 flow [2024-11-22 21:51:33,733 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:33,733 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:33,733 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:51:33,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:51:33,734 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:33,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:33,734 INFO L85 PathProgramCache]: Analyzing trace with hash 475087084, now seen corresponding path program 1 times [2024-11-22 21:51:33,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:33,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285238249] [2024-11-22 21:51:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:33,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:33,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:33,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285238249] [2024-11-22 21:51:33,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285238249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:33,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252117124] [2024-11-22 21:51:33,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:33,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:33,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:33,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:33,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:51:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:33,994 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 21:51:33,997 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:34,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:51:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:34,207 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:34,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252117124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:34,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:34,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:51:34,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551119473] [2024-11-22 21:51:34,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:34,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:51:34,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:51:34,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:51:34,330 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-22 21:51:34,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 36 transitions, 97 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:34,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:34,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-22 21:51:34,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:34,571 INFO L124 PetriNetUnfolderBase]: 194/368 cut-off events. [2024-11-22 21:51:34,571 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:51:34,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 368 events. 194/368 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 1768 event pairs, 172 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 713. Up to 337 conditions per place. [2024-11-22 21:51:34,575 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 22 selfloop transitions, 7 changer transitions 0/35 dead transitions. [2024-11-22 21:51:34,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 151 flow [2024-11-22 21:51:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:51:34,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:51:34,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-22 21:51:34,578 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-11-22 21:51:34,578 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 97 flow. Second operand 6 states and 90 transitions. [2024-11-22 21:51:34,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 151 flow [2024-11-22 21:51:34,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 35 transitions, 148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:34,580 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 104 flow [2024-11-22 21:51:34,580 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=104, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2024-11-22 21:51:34,581 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2024-11-22 21:51:34,581 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 104 flow [2024-11-22 21:51:34,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:34,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:34,581 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:51:34,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:51:34,786 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:34,788 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:34,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:34,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1844743689, now seen corresponding path program 1 times [2024-11-22 21:51:34,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:34,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270029706] [2024-11-22 21:51:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:34,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:34,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:34,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270029706] [2024-11-22 21:51:34,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270029706] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:34,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:34,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:34,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172362893] [2024-11-22 21:51:34,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:34,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:34,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:34,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:34,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:34,851 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-22 21:51:34,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:34,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:34,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-22 21:51:34,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:34,905 INFO L124 PetriNetUnfolderBase]: 132/258 cut-off events. [2024-11-22 21:51:34,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:51:34,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 258 events. 132/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1095 event pairs, 113 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 496. Up to 230 conditions per place. [2024-11-22 21:51:34,908 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 23 selfloop transitions, 3 changer transitions 0/32 dead transitions. [2024-11-22 21:51:34,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 150 flow [2024-11-22 21:51:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:34,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2024-11-22 21:51:34,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-11-22 21:51:34,909 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 104 flow. Second operand 4 states and 66 transitions. [2024-11-22 21:51:34,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 150 flow [2024-11-22 21:51:34,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 120 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-22 21:51:34,910 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 74 flow [2024-11-22 21:51:34,910 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2024-11-22 21:51:34,910 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2024-11-22 21:51:34,910 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 74 flow [2024-11-22 21:51:34,911 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:34,911 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:34,911 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:51:34,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:51:34,911 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:34,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1844743690, now seen corresponding path program 1 times [2024-11-22 21:51:34,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:34,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087218057] [2024-11-22 21:51:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:34,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:34,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087218057] [2024-11-22 21:51:34,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087218057] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:34,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:34,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:34,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731187774] [2024-11-22 21:51:34,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:34,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:34,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:34,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:34,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:34,978 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-22 21:51:34,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:34,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:34,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-22 21:51:34,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:35,053 INFO L124 PetriNetUnfolderBase]: 144/294 cut-off events. [2024-11-22 21:51:35,054 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:51:35,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 294 events. 144/294 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1231 event pairs, 126 based on Foata normal form. 14/252 useless extension candidates. Maximal degree in co-relation 488. Up to 233 conditions per place. [2024-11-22 21:51:35,055 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 23 selfloop transitions, 2 changer transitions 8/39 dead transitions. [2024-11-22 21:51:35,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 39 transitions, 156 flow [2024-11-22 21:51:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-22 21:51:35,057 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-11-22 21:51:35,057 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 74 flow. Second operand 4 states and 83 transitions. [2024-11-22 21:51:35,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 39 transitions, 156 flow [2024-11-22 21:51:35,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 39 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:35,058 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 83 flow [2024-11-22 21:51:35,058 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=83, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2024-11-22 21:51:35,058 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-22 21:51:35,059 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 83 flow [2024-11-22 21:51:35,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:35,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:35,059 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:35,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:51:35,059 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:35,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:35,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1404514061, now seen corresponding path program 1 times [2024-11-22 21:51:35,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:35,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072601672] [2024-11-22 21:51:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:35,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:35,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:35,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072601672] [2024-11-22 21:51:35,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072601672] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:35,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:35,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:35,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937449296] [2024-11-22 21:51:35,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:35,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:51:35,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:35,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:51:35,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:51:35,220 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-22 21:51:35,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 83 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:35,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:35,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-22 21:51:35,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:35,271 INFO L124 PetriNetUnfolderBase]: 81/167 cut-off events. [2024-11-22 21:51:35,272 INFO L125 PetriNetUnfolderBase]: For 27/30 co-relation queries the response was YES. [2024-11-22 21:51:35,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 167 events. 81/167 cut-off events. For 27/30 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 554 event pairs, 66 based on Foata normal form. 0/149 useless extension candidates. Maximal degree in co-relation 350. Up to 143 conditions per place. [2024-11-22 21:51:35,273 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 20 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2024-11-22 21:51:35,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 115 flow [2024-11-22 21:51:35,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:35,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-22 21:51:35,274 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-22 21:51:35,274 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 83 flow. Second operand 4 states and 67 transitions. [2024-11-22 21:51:35,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 115 flow [2024-11-22 21:51:35,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 111 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:35,275 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 71 flow [2024-11-22 21:51:35,275 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=71, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-11-22 21:51:35,275 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -7 predicate places. [2024-11-22 21:51:35,276 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 71 flow [2024-11-22 21:51:35,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:35,276 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:35,276 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:35,276 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:51:35,276 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:35,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:35,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1693792893, now seen corresponding path program 1 times [2024-11-22 21:51:35,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:35,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684782719] [2024-11-22 21:51:35,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:35,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:35,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:35,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:35,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:35,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684782719] [2024-11-22 21:51:35,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684782719] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:35,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:35,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:35,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638273277] [2024-11-22 21:51:35,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:35,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:35,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:35,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:35,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:35,319 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-22 21:51:35,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:35,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:35,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-22 21:51:35,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:35,363 INFO L124 PetriNetUnfolderBase]: 99/210 cut-off events. [2024-11-22 21:51:35,363 INFO L125 PetriNetUnfolderBase]: For 35/38 co-relation queries the response was YES. [2024-11-22 21:51:35,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 210 events. 99/210 cut-off events. For 35/38 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 681 event pairs, 27 based on Foata normal form. 3/201 useless extension candidates. Maximal degree in co-relation 418. Up to 132 conditions per place. [2024-11-22 21:51:35,364 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 26 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2024-11-22 21:51:35,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 35 transitions, 148 flow [2024-11-22 21:51:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:35,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-11-22 21:51:35,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-11-22 21:51:35,366 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 71 flow. Second operand 3 states and 61 transitions. [2024-11-22 21:51:35,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 35 transitions, 148 flow [2024-11-22 21:51:35,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:35,368 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 91 flow [2024-11-22 21:51:35,368 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2024-11-22 21:51:35,369 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -6 predicate places. [2024-11-22 21:51:35,369 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 91 flow [2024-11-22 21:51:35,370 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:35,370 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:35,370 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:35,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 21:51:35,370 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:35,371 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:35,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1219024711, now seen corresponding path program 2 times [2024-11-22 21:51:35,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:35,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208072579] [2024-11-22 21:51:35,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:35,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:35,386 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:51:35,386 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:35,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:35,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208072579] [2024-11-22 21:51:35,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208072579] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:35,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:35,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 21:51:35,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144373754] [2024-11-22 21:51:35,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:35,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:51:35,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:35,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:51:35,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:51:35,512 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-22 21:51:35,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 91 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:35,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:35,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-22 21:51:35,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:35,618 INFO L124 PetriNetUnfolderBase]: 191/391 cut-off events. [2024-11-22 21:51:35,618 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-11-22 21:51:35,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 391 events. 191/391 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1578 event pairs, 40 based on Foata normal form. 1/388 useless extension candidates. Maximal degree in co-relation 905. Up to 129 conditions per place. [2024-11-22 21:51:35,621 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 46 selfloop transitions, 9 changer transitions 6/65 dead transitions. [2024-11-22 21:51:35,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 314 flow [2024-11-22 21:51:35,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:51:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:51:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-11-22 21:51:35,633 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4125 [2024-11-22 21:51:35,633 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 91 flow. Second operand 8 states and 132 transitions. [2024-11-22 21:51:35,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 314 flow [2024-11-22 21:51:35,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 289 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:35,634 INFO L231 Difference]: Finished difference. Result has 42 places, 36 transitions, 128 flow [2024-11-22 21:51:35,634 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=128, PETRI_PLACES=42, PETRI_TRANSITIONS=36} [2024-11-22 21:51:35,635 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 2 predicate places. [2024-11-22 21:51:35,635 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 36 transitions, 128 flow [2024-11-22 21:51:35,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:35,635 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:35,635 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:35,635 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:51:35,635 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:35,636 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:35,636 INFO L85 PathProgramCache]: Analyzing trace with hash 2001376806, now seen corresponding path program 1 times [2024-11-22 21:51:35,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:35,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645140091] [2024-11-22 21:51:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:35,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:35,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:35,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:35,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645140091] [2024-11-22 21:51:35,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645140091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:35,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012306925] [2024-11-22 21:51:35,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:35,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:35,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:35,734 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:35,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:51:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:35,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:51:35,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:35,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:35,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012306925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:35,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:35,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-22 21:51:35,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048818680] [2024-11-22 21:51:35,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:35,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:51:35,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:35,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:51:35,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:51:35,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-22 21:51:35,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 36 transitions, 128 flow. Second operand has 12 states, 12 states have (on average 14.333333333333334) internal successors, (172), 12 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:35,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:35,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-22 21:51:35,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:36,047 INFO L124 PetriNetUnfolderBase]: 243/567 cut-off events. [2024-11-22 21:51:36,047 INFO L125 PetriNetUnfolderBase]: For 301/322 co-relation queries the response was YES. [2024-11-22 21:51:36,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404 conditions, 567 events. 243/567 cut-off events. For 301/322 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2852 event pairs, 137 based on Foata normal form. 25/570 useless extension candidates. Maximal degree in co-relation 1389. Up to 262 conditions per place. [2024-11-22 21:51:36,050 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 42 selfloop transitions, 7 changer transitions 4/62 dead transitions. [2024-11-22 21:51:36,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 62 transitions, 323 flow [2024-11-22 21:51:36,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:51:36,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:51:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-11-22 21:51:36,051 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-22 21:51:36,051 INFO L175 Difference]: Start difference. First operand has 42 places, 36 transitions, 128 flow. Second operand 7 states and 125 transitions. [2024-11-22 21:51:36,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 62 transitions, 323 flow [2024-11-22 21:51:36,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 312 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:36,053 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 171 flow [2024-11-22 21:51:36,053 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=171, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-11-22 21:51:36,054 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 9 predicate places. [2024-11-22 21:51:36,054 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 171 flow [2024-11-22 21:51:36,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.333333333333334) internal successors, (172), 12 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:36,054 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:36,054 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:36,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-22 21:51:36,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-22 21:51:36,255 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:36,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:36,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1836493961, now seen corresponding path program 1 times [2024-11-22 21:51:36,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:36,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198031077] [2024-11-22 21:51:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:36,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:36,366 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:36,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:36,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198031077] [2024-11-22 21:51:36,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198031077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:36,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882732143] [2024-11-22 21:51:36,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:36,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:36,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:36,369 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:36,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:51:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:36,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:51:36,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:36,515 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:36,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882732143] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:36,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:36,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-11-22 21:51:36,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901695280] [2024-11-22 21:51:36,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:36,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:51:36,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:36,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:51:36,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:51:36,618 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-22 21:51:36,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 171 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:36,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:36,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-22 21:51:36,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:36,779 INFO L124 PetriNetUnfolderBase]: 176/417 cut-off events. [2024-11-22 21:51:36,779 INFO L125 PetriNetUnfolderBase]: For 259/261 co-relation queries the response was YES. [2024-11-22 21:51:36,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 417 events. 176/417 cut-off events. For 259/261 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1831 event pairs, 52 based on Foata normal form. 6/420 useless extension candidates. Maximal degree in co-relation 820. Up to 214 conditions per place. [2024-11-22 21:51:36,781 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 26 selfloop transitions, 7 changer transitions 19/61 dead transitions. [2024-11-22 21:51:36,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 61 transitions, 333 flow [2024-11-22 21:51:36,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:51:36,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:51:36,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-11-22 21:51:36,782 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-22 21:51:36,782 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 171 flow. Second operand 9 states and 150 transitions. [2024-11-22 21:51:36,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 61 transitions, 333 flow [2024-11-22 21:51:36,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 61 transitions, 326 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:36,784 INFO L231 Difference]: Finished difference. Result has 57 places, 38 transitions, 166 flow [2024-11-22 21:51:36,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=166, PETRI_PLACES=57, PETRI_TRANSITIONS=38} [2024-11-22 21:51:36,785 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2024-11-22 21:51:36,785 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 38 transitions, 166 flow [2024-11-22 21:51:36,785 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:36,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:36,786 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:36,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:51:36,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:36,987 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:36,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:36,987 INFO L85 PathProgramCache]: Analyzing trace with hash -787490031, now seen corresponding path program 2 times [2024-11-22 21:51:36,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:36,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771897341] [2024-11-22 21:51:36,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:36,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:37,012 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:37,012 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:37,327 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:37,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:37,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771897341] [2024-11-22 21:51:37,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771897341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:37,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609929844] [2024-11-22 21:51:37,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:37,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:37,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:37,330 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:37,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:51:37,397 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:37,397 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:37,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 21:51:37,400 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:37,655 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:51:37,656 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 23 treesize of output 10 [2024-11-22 21:51:37,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:37,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:37,781 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:51:37,782 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 25 treesize of output 12 [2024-11-22 21:51:37,977 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:37,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609929844] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:37,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:37,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-22 21:51:37,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121949192] [2024-11-22 21:51:37,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:37,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 21:51:37,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:37,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 21:51:37,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-11-22 21:51:38,035 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-22 21:51:38,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 38 transitions, 166 flow. Second operand has 22 states, 22 states have (on average 11.727272727272727) internal successors, (258), 22 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:38,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:38,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-22 21:51:38,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:39,047 INFO L124 PetriNetUnfolderBase]: 664/1329 cut-off events. [2024-11-22 21:51:39,048 INFO L125 PetriNetUnfolderBase]: For 1058/1061 co-relation queries the response was YES. [2024-11-22 21:51:39,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3486 conditions, 1329 events. 664/1329 cut-off events. For 1058/1061 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7228 event pairs, 93 based on Foata normal form. 40/1363 useless extension candidates. Maximal degree in co-relation 3338. Up to 304 conditions per place. [2024-11-22 21:51:39,056 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 130 selfloop transitions, 36 changer transitions 0/173 dead transitions. [2024-11-22 21:51:39,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 173 transitions, 1004 flow [2024-11-22 21:51:39,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-22 21:51:39,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-22 21:51:39,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 324 transitions. [2024-11-22 21:51:39,057 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-22 21:51:39,058 INFO L175 Difference]: Start difference. First operand has 57 places, 38 transitions, 166 flow. Second operand 18 states and 324 transitions. [2024-11-22 21:51:39,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 173 transitions, 1004 flow [2024-11-22 21:51:39,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 173 transitions, 942 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-11-22 21:51:39,062 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 486 flow [2024-11-22 21:51:39,062 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=486, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2024-11-22 21:51:39,063 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 32 predicate places. [2024-11-22 21:51:39,063 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 486 flow [2024-11-22 21:51:39,063 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.727272727272727) internal successors, (258), 22 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:39,063 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:39,063 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:39,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:51:39,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:39,264 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:39,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash -15690443, now seen corresponding path program 3 times [2024-11-22 21:51:39,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:39,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320242789] [2024-11-22 21:51:39,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:51:39,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:39,281 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:51:39,281 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:39,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:39,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:39,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320242789] [2024-11-22 21:51:39,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320242789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:39,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725546940] [2024-11-22 21:51:39,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:51:39,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:39,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:39,371 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:39,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:51:39,445 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:51:39,445 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:39,447 INFO L255 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 21:51:39,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:39,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:39,473 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:39,492 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:51:39,492 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 25 treesize of output 12 [2024-11-22 21:51:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:39,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725546940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:39,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:39,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2024-11-22 21:51:39,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498679239] [2024-11-22 21:51:39,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:39,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 21:51:39,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:39,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 21:51:39,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:51:39,518 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 40 [2024-11-22 21:51:39,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 486 flow. Second operand has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:39,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:39,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 40 [2024-11-22 21:51:39,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:39,742 INFO L124 PetriNetUnfolderBase]: 1014/1916 cut-off events. [2024-11-22 21:51:39,743 INFO L125 PetriNetUnfolderBase]: For 5191/5193 co-relation queries the response was YES. [2024-11-22 21:51:39,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6458 conditions, 1916 events. 1014/1916 cut-off events. For 5191/5193 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 9992 event pairs, 203 based on Foata normal form. 40/1954 useless extension candidates. Maximal degree in co-relation 4914. Up to 712 conditions per place. [2024-11-22 21:51:39,754 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 101 selfloop transitions, 30 changer transitions 0/134 dead transitions. [2024-11-22 21:51:39,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 134 transitions, 1101 flow [2024-11-22 21:51:39,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:51:39,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:51:39,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-11-22 21:51:39,755 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-11-22 21:51:39,755 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 486 flow. Second operand 6 states and 108 transitions. [2024-11-22 21:51:39,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 134 transitions, 1101 flow [2024-11-22 21:51:39,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 134 transitions, 1023 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:39,764 INFO L231 Difference]: Finished difference. Result has 77 places, 87 transitions, 635 flow [2024-11-22 21:51:39,764 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=635, PETRI_PLACES=77, PETRI_TRANSITIONS=87} [2024-11-22 21:51:39,765 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 37 predicate places. [2024-11-22 21:51:39,765 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 87 transitions, 635 flow [2024-11-22 21:51:39,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.11111111111111) internal successors, (109), 9 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:39,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:39,765 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:39,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 21:51:39,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-22 21:51:39,968 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:39,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:39,969 INFO L85 PathProgramCache]: Analyzing trace with hash 476075896, now seen corresponding path program 2 times [2024-11-22 21:51:39,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:39,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804975033] [2024-11-22 21:51:39,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:39,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:39,987 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:39,988 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:40,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:40,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804975033] [2024-11-22 21:51:40,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804975033] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:40,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:40,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:51:40,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180174894] [2024-11-22 21:51:40,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:40,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:51:40,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:40,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:51:40,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:51:40,059 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-22 21:51:40,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 87 transitions, 635 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:40,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-22 21:51:40,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:40,219 INFO L124 PetriNetUnfolderBase]: 698/1632 cut-off events. [2024-11-22 21:51:40,220 INFO L125 PetriNetUnfolderBase]: For 7017/7142 co-relation queries the response was YES. [2024-11-22 21:51:40,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5645 conditions, 1632 events. 698/1632 cut-off events. For 7017/7142 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10418 event pairs, 126 based on Foata normal form. 52/1618 useless extension candidates. Maximal degree in co-relation 4214. Up to 695 conditions per place. [2024-11-22 21:51:40,228 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 76 selfloop transitions, 25 changer transitions 6/124 dead transitions. [2024-11-22 21:51:40,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 124 transitions, 1020 flow [2024-11-22 21:51:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:40,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:40,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-11-22 21:51:40,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-22 21:51:40,229 INFO L175 Difference]: Start difference. First operand has 77 places, 87 transitions, 635 flow. Second operand 4 states and 92 transitions. [2024-11-22 21:51:40,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 124 transitions, 1020 flow [2024-11-22 21:51:40,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 124 transitions, 1005 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:40,238 INFO L231 Difference]: Finished difference. Result has 81 places, 95 transitions, 808 flow [2024-11-22 21:51:40,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=599, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=808, PETRI_PLACES=81, PETRI_TRANSITIONS=95} [2024-11-22 21:51:40,239 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 41 predicate places. [2024-11-22 21:51:40,239 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 95 transitions, 808 flow [2024-11-22 21:51:40,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:40,239 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:40,239 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-22 21:51:40,239 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:40,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:40,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2068215199, now seen corresponding path program 1 times [2024-11-22 21:51:40,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:40,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254303447] [2024-11-22 21:51:40,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:40,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:40,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:40,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254303447] [2024-11-22 21:51:40,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254303447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:40,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185099016] [2024-11-22 21:51:40,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:40,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:40,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:40,791 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:40,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:51:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:40,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-22 21:51:40,857 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:41,167 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 12 treesize of output 3 [2024-11-22 21:51:41,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:41,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:41,488 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:51:41,489 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 26 treesize of output 18 [2024-11-22 21:51:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:41,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185099016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:41,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:41,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2024-11-22 21:51:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341890863] [2024-11-22 21:51:41,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:41,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-22 21:51:41,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:41,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-22 21:51:41,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2024-11-22 21:51:41,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-22 21:51:41,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 95 transitions, 808 flow. Second operand has 40 states, 40 states have (on average 8.95) internal successors, (358), 40 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:41,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:41,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-22 21:51:41,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:44,664 INFO L124 PetriNetUnfolderBase]: 2731/5058 cut-off events. [2024-11-22 21:51:44,665 INFO L125 PetriNetUnfolderBase]: For 20636/20636 co-relation queries the response was YES. [2024-11-22 21:51:44,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18987 conditions, 5058 events. 2731/5058 cut-off events. For 20636/20636 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 32266 event pairs, 253 based on Foata normal form. 5/5063 useless extension candidates. Maximal degree in co-relation 14939. Up to 1858 conditions per place. [2024-11-22 21:51:44,697 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 242 selfloop transitions, 191 changer transitions 52/487 dead transitions. [2024-11-22 21:51:44,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 487 transitions, 4229 flow [2024-11-22 21:51:44,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-11-22 21:51:44,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-11-22 21:51:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 659 transitions. [2024-11-22 21:51:44,699 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32303921568627453 [2024-11-22 21:51:44,699 INFO L175 Difference]: Start difference. First operand has 81 places, 95 transitions, 808 flow. Second operand 51 states and 659 transitions. [2024-11-22 21:51:44,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 487 transitions, 4229 flow [2024-11-22 21:51:44,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 487 transitions, 4101 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:44,742 INFO L231 Difference]: Finished difference. Result has 161 places, 271 transitions, 3119 flow [2024-11-22 21:51:44,742 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=3119, PETRI_PLACES=161, PETRI_TRANSITIONS=271} [2024-11-22 21:51:44,743 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 121 predicate places. [2024-11-22 21:51:44,743 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 271 transitions, 3119 flow [2024-11-22 21:51:44,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 8.95) internal successors, (358), 40 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:44,743 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:44,743 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:44,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:51:44,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:44,944 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:44,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:44,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1656084809, now seen corresponding path program 2 times [2024-11-22 21:51:44,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:44,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900329964] [2024-11-22 21:51:44,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:44,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:44,968 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:44,968 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:45,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:45,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900329964] [2024-11-22 21:51:45,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900329964] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:45,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988828215] [2024-11-22 21:51:45,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:45,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:45,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:45,537 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:45,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:51:45,588 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:45,588 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:45,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-22 21:51:45,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:45,815 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 12 treesize of output 3 [2024-11-22 21:51:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:45,989 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:46,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:51:46,265 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 37 treesize of output 21 [2024-11-22 21:51:46,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:46,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988828215] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:46,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:46,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2024-11-22 21:51:46,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937227040] [2024-11-22 21:51:46,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:46,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-22 21:51:46,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:46,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-22 21:51:46,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2024-11-22 21:51:46,689 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-22 21:51:46,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 271 transitions, 3119 flow. Second operand has 43 states, 43 states have (on average 8.837209302325581) internal successors, (380), 43 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:46,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:46,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-22 21:51:46,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:50,774 INFO L124 PetriNetUnfolderBase]: 5159/9458 cut-off events. [2024-11-22 21:51:50,775 INFO L125 PetriNetUnfolderBase]: For 90935/90935 co-relation queries the response was YES. [2024-11-22 21:51:50,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49824 conditions, 9458 events. 5159/9458 cut-off events. For 90935/90935 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 63360 event pairs, 188 based on Foata normal form. 11/9469 useless extension candidates. Maximal degree in co-relation 49719. Up to 2017 conditions per place. [2024-11-22 21:51:50,840 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 388 selfloop transitions, 565 changer transitions 93/1048 dead transitions. [2024-11-22 21:51:50,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 1048 transitions, 13149 flow [2024-11-22 21:51:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-22 21:51:50,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-11-22 21:51:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 958 transitions. [2024-11-22 21:51:50,844 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3471014492753623 [2024-11-22 21:51:50,844 INFO L175 Difference]: Start difference. First operand has 161 places, 271 transitions, 3119 flow. Second operand 69 states and 958 transitions. [2024-11-22 21:51:50,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 1048 transitions, 13149 flow [2024-11-22 21:51:51,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 1048 transitions, 12635 flow, removed 251 selfloop flow, removed 9 redundant places. [2024-11-22 21:51:51,182 INFO L231 Difference]: Finished difference. Result has 242 places, 705 transitions, 10142 flow [2024-11-22 21:51:51,182 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2870, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=10142, PETRI_PLACES=242, PETRI_TRANSITIONS=705} [2024-11-22 21:51:51,182 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 202 predicate places. [2024-11-22 21:51:51,182 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 705 transitions, 10142 flow [2024-11-22 21:51:51,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 8.837209302325581) internal successors, (380), 43 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:51,183 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:51,183 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:51,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 21:51:51,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:51,384 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:51,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:51,384 INFO L85 PathProgramCache]: Analyzing trace with hash -859393391, now seen corresponding path program 3 times [2024-11-22 21:51:51,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:51,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068674347] [2024-11-22 21:51:51,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:51:51,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:51,401 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:51:51,402 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:51,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:51,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:51,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068674347] [2024-11-22 21:51:51,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068674347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:51,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391195739] [2024-11-22 21:51:51,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:51:51,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:51,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:51,642 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:51,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:51:51,703 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:51:51,703 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:51,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 21:51:51,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:51,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:51,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:51,925 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:51:51,926 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 26 treesize of output 18 [2024-11-22 21:51:51,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:51,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391195739] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:51,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:51,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2024-11-22 21:51:51,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555466143] [2024-11-22 21:51:51,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:51,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 21:51:51,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:51,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 21:51:51,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-22 21:51:52,001 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-22 21:51:52,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 705 transitions, 10142 flow. Second operand has 21 states, 21 states have (on average 9.285714285714286) internal successors, (195), 21 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:52,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:52,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-22 21:51:52,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:54,230 INFO L124 PetriNetUnfolderBase]: 5021/9221 cut-off events. [2024-11-22 21:51:54,230 INFO L125 PetriNetUnfolderBase]: For 161500/161500 co-relation queries the response was YES. [2024-11-22 21:51:54,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61904 conditions, 9221 events. 5021/9221 cut-off events. For 161500/161500 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 62314 event pairs, 344 based on Foata normal form. 2/9223 useless extension candidates. Maximal degree in co-relation 61792. Up to 2993 conditions per place. [2024-11-22 21:51:54,401 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 512 selfloop transitions, 504 changer transitions 28/1046 dead transitions. [2024-11-22 21:51:54,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 1046 transitions, 16854 flow [2024-11-22 21:51:54,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-22 21:51:54,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-22 21:51:54,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 363 transitions. [2024-11-22 21:51:54,403 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32410714285714287 [2024-11-22 21:51:54,403 INFO L175 Difference]: Start difference. First operand has 242 places, 705 transitions, 10142 flow. Second operand 28 states and 363 transitions. [2024-11-22 21:51:54,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 1046 transitions, 16854 flow [2024-11-22 21:51:55,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1046 transitions, 15720 flow, removed 538 selfloop flow, removed 19 redundant places. [2024-11-22 21:51:55,234 INFO L231 Difference]: Finished difference. Result has 256 places, 875 transitions, 13242 flow [2024-11-22 21:51:55,235 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9398, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=340, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=13242, PETRI_PLACES=256, PETRI_TRANSITIONS=875} [2024-11-22 21:51:55,235 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 216 predicate places. [2024-11-22 21:51:55,235 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 875 transitions, 13242 flow [2024-11-22 21:51:55,236 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 9.285714285714286) internal successors, (195), 21 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:55,236 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:55,236 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:55,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 21:51:55,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 21:51:55,440 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:51:55,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:55,440 INFO L85 PathProgramCache]: Analyzing trace with hash -2045256153, now seen corresponding path program 4 times [2024-11-22 21:51:55,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:55,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850597941] [2024-11-22 21:51:55,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:51:55,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:55,461 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:51:55,462 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:55,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850597941] [2024-11-22 21:51:55,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850597941] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:55,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083280607] [2024-11-22 21:51:55,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:51:55,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:55,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:55,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:55,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:51:55,746 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:51:55,746 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:55,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-22 21:51:55,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:55,970 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:51:55,971 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 23 treesize of output 15 [2024-11-22 21:51:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:56,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:56,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:51:56,408 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 26 treesize of output 18 [2024-11-22 21:51:56,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:56,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083280607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:56,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:56,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 36 [2024-11-22 21:51:56,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716353106] [2024-11-22 21:51:56,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:56,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-22 21:51:56,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:56,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-22 21:51:56,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2024-11-22 21:51:56,760 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-22 21:51:56,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 875 transitions, 13242 flow. Second operand has 37 states, 37 states have (on average 9.054054054054054) internal successors, (335), 37 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:56,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:56,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-22 21:51:56,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:03,752 INFO L124 PetriNetUnfolderBase]: 7168/13175 cut-off events. [2024-11-22 21:52:03,752 INFO L125 PetriNetUnfolderBase]: For 243705/243705 co-relation queries the response was YES. [2024-11-22 21:52:03,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88966 conditions, 13175 events. 7168/13175 cut-off events. For 243705/243705 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 96791 event pairs, 354 based on Foata normal form. 17/13192 useless extension candidates. Maximal degree in co-relation 88849. Up to 4625 conditions per place. [2024-11-22 21:52:03,897 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 698 selfloop transitions, 939 changer transitions 139/1778 dead transitions. [2024-11-22 21:52:03,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1778 transitions, 28264 flow [2024-11-22 21:52:03,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2024-11-22 21:52:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2024-11-22 21:52:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 1307 transitions. [2024-11-22 21:52:03,901 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31723300970873786 [2024-11-22 21:52:03,901 INFO L175 Difference]: Start difference. First operand has 256 places, 875 transitions, 13242 flow. Second operand 103 states and 1307 transitions. [2024-11-22 21:52:03,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1778 transitions, 28264 flow [2024-11-22 21:52:05,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 1778 transitions, 27610 flow, removed 311 selfloop flow, removed 9 redundant places. [2024-11-22 21:52:05,595 INFO L231 Difference]: Finished difference. Result has 384 places, 1357 transitions, 23718 flow [2024-11-22 21:52:05,596 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=12996, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=875, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=527, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=103, PETRI_FLOW=23718, PETRI_PLACES=384, PETRI_TRANSITIONS=1357} [2024-11-22 21:52:05,596 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 344 predicate places. [2024-11-22 21:52:05,596 INFO L471 AbstractCegarLoop]: Abstraction has has 384 places, 1357 transitions, 23718 flow [2024-11-22 21:52:05,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.054054054054054) internal successors, (335), 37 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:05,597 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:05,597 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:05,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:05,800 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 [2024-11-22 21:52:05,801 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:52:05,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:05,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1830369352, now seen corresponding path program 5 times [2024-11-22 21:52:05,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:05,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571564794] [2024-11-22 21:52:05,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:52:05,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:05,837 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-22 21:52:05,838 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:06,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:06,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571564794] [2024-11-22 21:52:06,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571564794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:06,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759724333] [2024-11-22 21:52:06,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:52:06,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:06,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:06,398 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) [2024-11-22 21:52:06,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:52:06,453 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-22 21:52:06,453 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:06,454 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 21:52:06,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:06,651 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:06,652 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:06,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:52:06,752 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 26 treesize of output 18 [2024-11-22 21:52:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:06,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759724333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:06,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:06,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 10] total 32 [2024-11-22 21:52:06,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322793139] [2024-11-22 21:52:06,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:06,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-22 21:52:06,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-22 21:52:06,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2024-11-22 21:52:06,870 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-22 21:52:06,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 1357 transitions, 23718 flow. Second operand has 33 states, 33 states have (on average 9.090909090909092) internal successors, (300), 33 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:06,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:06,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-22 21:52:06,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:11,594 INFO L124 PetriNetUnfolderBase]: 6687/12272 cut-off events. [2024-11-22 21:52:11,594 INFO L125 PetriNetUnfolderBase]: For 397148/397148 co-relation queries the response was YES. [2024-11-22 21:52:11,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98461 conditions, 12272 events. 6687/12272 cut-off events. For 397148/397148 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 88178 event pairs, 508 based on Foata normal form. 2/12274 useless extension candidates. Maximal degree in co-relation 98307. Up to 5778 conditions per place. [2024-11-22 21:52:11,724 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 748 selfloop transitions, 721 changer transitions 13/1484 dead transitions. [2024-11-22 21:52:11,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1484 transitions, 28344 flow [2024-11-22 21:52:11,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 21:52:11,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-22 21:52:11,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 265 transitions. [2024-11-22 21:52:11,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33125 [2024-11-22 21:52:11,725 INFO L175 Difference]: Start difference. First operand has 384 places, 1357 transitions, 23718 flow. Second operand 20 states and 265 transitions. [2024-11-22 21:52:11,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1484 transitions, 28344 flow [2024-11-22 21:52:14,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1484 transitions, 26585 flow, removed 811 selfloop flow, removed 28 redundant places. [2024-11-22 21:52:15,007 INFO L231 Difference]: Finished difference. Result has 366 places, 1378 transitions, 24996 flow [2024-11-22 21:52:15,008 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=22259, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=698, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=641, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=24996, PETRI_PLACES=366, PETRI_TRANSITIONS=1378} [2024-11-22 21:52:15,008 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 326 predicate places. [2024-11-22 21:52:15,008 INFO L471 AbstractCegarLoop]: Abstraction has has 366 places, 1378 transitions, 24996 flow [2024-11-22 21:52:15,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.090909090909092) internal successors, (300), 33 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:15,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:15,008 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:15,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 21:52:15,209 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 [2024-11-22 21:52:15,209 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:52:15,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:15,209 INFO L85 PathProgramCache]: Analyzing trace with hash -734902204, now seen corresponding path program 6 times [2024-11-22 21:52:15,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:15,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039676207] [2024-11-22 21:52:15,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:52:15,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:15,226 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 21:52:15,226 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:15,424 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:15,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:15,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039676207] [2024-11-22 21:52:15,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039676207] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:15,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659846818] [2024-11-22 21:52:15,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:52:15,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:15,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:15,428 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) [2024-11-22 21:52:15,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:52:15,485 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-22 21:52:15,486 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:15,487 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:52:15,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:15,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:15,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:52:15,694 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 37 treesize of output 21 [2024-11-22 21:52:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:15,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659846818] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:15,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:15,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2024-11-22 21:52:15,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249649024] [2024-11-22 21:52:15,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:15,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 21:52:15,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:15,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 21:52:15,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2024-11-22 21:52:15,761 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-22 21:52:15,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 1378 transitions, 24996 flow. Second operand has 23 states, 23 states have (on average 9.043478260869565) internal successors, (208), 23 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:15,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:15,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-22 21:52:15,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:20,105 INFO L124 PetriNetUnfolderBase]: 6655/12245 cut-off events. [2024-11-22 21:52:20,105 INFO L125 PetriNetUnfolderBase]: For 387611/387611 co-relation queries the response was YES. [2024-11-22 21:52:20,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98229 conditions, 12245 events. 6655/12245 cut-off events. For 387611/387611 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 88351 event pairs, 375 based on Foata normal form. 1/12246 useless extension candidates. Maximal degree in co-relation 98081. Up to 5446 conditions per place. [2024-11-22 21:52:20,240 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 743 selfloop transitions, 734 changer transitions 30/1509 dead transitions. [2024-11-22 21:52:20,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1509 transitions, 29477 flow [2024-11-22 21:52:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 21:52:20,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 21:52:20,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 233 transitions. [2024-11-22 21:52:20,241 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3426470588235294 [2024-11-22 21:52:20,241 INFO L175 Difference]: Start difference. First operand has 366 places, 1378 transitions, 24996 flow. Second operand 17 states and 233 transitions. [2024-11-22 21:52:20,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1509 transitions, 29477 flow [2024-11-22 21:52:22,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1509 transitions, 29371 flow, removed 23 selfloop flow, removed 12 redundant places. [2024-11-22 21:52:22,937 INFO L231 Difference]: Finished difference. Result has 372 places, 1380 transitions, 27244 flow [2024-11-22 21:52:22,938 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=24898, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=27244, PETRI_PLACES=372, PETRI_TRANSITIONS=1380} [2024-11-22 21:52:22,938 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 332 predicate places. [2024-11-22 21:52:22,938 INFO L471 AbstractCegarLoop]: Abstraction has has 372 places, 1380 transitions, 27244 flow [2024-11-22 21:52:22,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.043478260869565) internal successors, (208), 23 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:22,939 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:22,939 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:22,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:23,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:23,141 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:52:23,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:23,141 INFO L85 PathProgramCache]: Analyzing trace with hash 490461298, now seen corresponding path program 7 times [2024-11-22 21:52:23,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:23,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815080753] [2024-11-22 21:52:23,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:52:23,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:52:23,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:23,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815080753] [2024-11-22 21:52:23,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815080753] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:23,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550776103] [2024-11-22 21:52:23,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:52:23,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:23,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:23,261 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) [2024-11-22 21:52:23,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:52:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:23,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:52:23,368 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:52:23,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:23,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:52:23,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550776103] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:23,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:23,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-22 21:52:23,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580908559] [2024-11-22 21:52:23,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:23,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:52:23,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:23,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:52:23,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:52:23,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-22 21:52:23,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 1380 transitions, 27244 flow. Second operand has 18 states, 18 states have (on average 13.666666666666666) internal successors, (246), 18 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:23,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:23,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-22 21:52:23,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:24,347 INFO L124 PetriNetUnfolderBase]: 1117/2572 cut-off events. [2024-11-22 21:52:24,347 INFO L125 PetriNetUnfolderBase]: For 98859/99005 co-relation queries the response was YES. [2024-11-22 21:52:24,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22463 conditions, 2572 events. 1117/2572 cut-off events. For 98859/99005 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 18251 event pairs, 314 based on Foata normal form. 274/2798 useless extension candidates. Maximal degree in co-relation 22347. Up to 962 conditions per place. [2024-11-22 21:52:24,378 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 152 selfloop transitions, 10 changer transitions 179/420 dead transitions. [2024-11-22 21:52:24,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 420 transitions, 8097 flow [2024-11-22 21:52:24,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:52:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:52:24,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-11-22 21:52:24,379 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-22 21:52:24,379 INFO L175 Difference]: Start difference. First operand has 372 places, 1380 transitions, 27244 flow. Second operand 9 states and 156 transitions. [2024-11-22 21:52:24,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 420 transitions, 8097 flow [2024-11-22 21:52:24,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 420 transitions, 7507 flow, removed 143 selfloop flow, removed 53 redundant places. [2024-11-22 21:52:24,838 INFO L231 Difference]: Finished difference. Result has 255 places, 223 transitions, 3748 flow [2024-11-22 21:52:24,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=6801, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3748, PETRI_PLACES=255, PETRI_TRANSITIONS=223} [2024-11-22 21:52:24,839 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 215 predicate places. [2024-11-22 21:52:24,839 INFO L471 AbstractCegarLoop]: Abstraction has has 255 places, 223 transitions, 3748 flow [2024-11-22 21:52:24,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.666666666666666) internal successors, (246), 18 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:24,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:24,839 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:24,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:25,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:25,040 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:52:25,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:25,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1182579497, now seen corresponding path program 8 times [2024-11-22 21:52:25,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:25,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114535543] [2024-11-22 21:52:25,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:25,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:25,050 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:52:25,050 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:25,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:25,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114535543] [2024-11-22 21:52:25,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114535543] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:25,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702593106] [2024-11-22 21:52:25,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:25,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:25,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:25,187 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) [2024-11-22 21:52:25,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:52:25,246 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:52:25,246 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:25,247 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:52:25,248 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:25,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:25,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:25,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702593106] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:25,476 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:25,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2024-11-22 21:52:25,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955266727] [2024-11-22 21:52:25,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:25,477 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 21:52:25,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 21:52:25,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-11-22 21:52:25,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-22 21:52:25,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 223 transitions, 3748 flow. Second operand has 19 states, 19 states have (on average 13.31578947368421) internal successors, (253), 19 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:25,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:25,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-22 21:52:25,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:25,970 INFO L124 PetriNetUnfolderBase]: 768/1641 cut-off events. [2024-11-22 21:52:25,971 INFO L125 PetriNetUnfolderBase]: For 32421/32465 co-relation queries the response was YES. [2024-11-22 21:52:25,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12273 conditions, 1641 events. 768/1641 cut-off events. For 32421/32465 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 9368 event pairs, 79 based on Foata normal form. 17/1625 useless extension candidates. Maximal degree in co-relation 12199. Up to 574 conditions per place. [2024-11-22 21:52:25,986 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 132 selfloop transitions, 40 changer transitions 35/278 dead transitions. [2024-11-22 21:52:25,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 278 transitions, 4522 flow [2024-11-22 21:52:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-22 21:52:25,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-22 21:52:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 226 transitions. [2024-11-22 21:52:25,989 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4346153846153846 [2024-11-22 21:52:25,989 INFO L175 Difference]: Start difference. First operand has 255 places, 223 transitions, 3748 flow. Second operand 13 states and 226 transitions. [2024-11-22 21:52:25,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 278 transitions, 4522 flow [2024-11-22 21:52:26,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 278 transitions, 4053 flow, removed 84 selfloop flow, removed 30 redundant places. [2024-11-22 21:52:26,053 INFO L231 Difference]: Finished difference. Result has 184 places, 205 transitions, 3167 flow [2024-11-22 21:52:26,053 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3254, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3167, PETRI_PLACES=184, PETRI_TRANSITIONS=205} [2024-11-22 21:52:26,053 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 144 predicate places. [2024-11-22 21:52:26,053 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 205 transitions, 3167 flow [2024-11-22 21:52:26,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.31578947368421) internal successors, (253), 19 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:26,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:26,053 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:26,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 21:52:26,254 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,SelfDestructingSolverStorable20 [2024-11-22 21:52:26,254 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:52:26,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:26,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1526430043, now seen corresponding path program 9 times [2024-11-22 21:52:26,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:26,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868232133] [2024-11-22 21:52:26,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:52:26,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:26,268 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 21:52:26,268 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:26,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:26,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868232133] [2024-11-22 21:52:26,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868232133] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:26,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269187772] [2024-11-22 21:52:26,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:52:26,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:26,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:26,395 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) [2024-11-22 21:52:26,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:52:26,493 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 21:52:26,493 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:26,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-22 21:52:26,499 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:26,559 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:26,605 INFO L349 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2024-11-22 21:52:26,605 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 26 treesize of output 14 [2024-11-22 21:52:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:26,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269187772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:26,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:26,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2024-11-22 21:52:26,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778292950] [2024-11-22 21:52:26,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:26,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:52:26,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:26,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:52:26,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:52:26,637 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 40 [2024-11-22 21:52:26,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 205 transitions, 3167 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:26,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:26,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 40 [2024-11-22 21:52:26,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:27,275 INFO L124 PetriNetUnfolderBase]: 1004/1989 cut-off events. [2024-11-22 21:52:27,275 INFO L125 PetriNetUnfolderBase]: For 34542/34575 co-relation queries the response was YES. [2024-11-22 21:52:27,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14231 conditions, 1989 events. 1004/1989 cut-off events. For 34542/34575 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 11108 event pairs, 30 based on Foata normal form. 99/2078 useless extension candidates. Maximal degree in co-relation 14174. Up to 453 conditions per place. [2024-11-22 21:52:27,290 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 237 selfloop transitions, 74 changer transitions 4/360 dead transitions. [2024-11-22 21:52:27,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 360 transitions, 5970 flow [2024-11-22 21:52:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:52:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:52:27,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 245 transitions. [2024-11-22 21:52:27,292 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-22 21:52:27,292 INFO L175 Difference]: Start difference. First operand has 184 places, 205 transitions, 3167 flow. Second operand 14 states and 245 transitions. [2024-11-22 21:52:27,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 360 transitions, 5970 flow [2024-11-22 21:52:27,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 360 transitions, 5600 flow, removed 41 selfloop flow, removed 13 redundant places. [2024-11-22 21:52:27,336 INFO L231 Difference]: Finished difference. Result has 170 places, 225 transitions, 3786 flow [2024-11-22 21:52:27,337 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3786, PETRI_PLACES=170, PETRI_TRANSITIONS=225} [2024-11-22 21:52:27,337 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 130 predicate places. [2024-11-22 21:52:27,337 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 225 transitions, 3786 flow [2024-11-22 21:52:27,337 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:27,337 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:27,337 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:27,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-22 21:52:27,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:27,538 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:52:27,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:27,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2080712808, now seen corresponding path program 10 times [2024-11-22 21:52:27,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:27,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258278128] [2024-11-22 21:52:27,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:52:27,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:27,560 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:52:27,561 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:27,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:27,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258278128] [2024-11-22 21:52:27,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258278128] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:27,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927443774] [2024-11-22 21:52:27,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:52:27,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:27,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:27,610 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) [2024-11-22 21:52:27,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:52:27,688 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:52:27,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:27,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:52:27,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:27,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:27,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927443774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:27,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:27,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 6] total 9 [2024-11-22 21:52:27,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960868258] [2024-11-22 21:52:27,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:27,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:52:27,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:27,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:52:27,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:52:27,825 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 40 [2024-11-22 21:52:27,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 225 transitions, 3786 flow. Second operand has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:27,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:27,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 40 [2024-11-22 21:52:27,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:28,295 INFO L124 PetriNetUnfolderBase]: 1614/3345 cut-off events. [2024-11-22 21:52:28,295 INFO L125 PetriNetUnfolderBase]: For 69212/69318 co-relation queries the response was YES. [2024-11-22 21:52:28,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24468 conditions, 3345 events. 1614/3345 cut-off events. For 69212/69318 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 21871 event pairs, 103 based on Foata normal form. 54/3310 useless extension candidates. Maximal degree in co-relation 24407. Up to 921 conditions per place. [2024-11-22 21:52:28,325 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 168 selfloop transitions, 101 changer transitions 8/349 dead transitions. [2024-11-22 21:52:28,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 349 transitions, 6291 flow [2024-11-22 21:52:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:52:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:52:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-11-22 21:52:28,326 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-11-22 21:52:28,326 INFO L175 Difference]: Start difference. First operand has 170 places, 225 transitions, 3786 flow. Second operand 5 states and 117 transitions. [2024-11-22 21:52:28,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 349 transitions, 6291 flow [2024-11-22 21:52:28,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 349 transitions, 5910 flow, removed 133 selfloop flow, removed 8 redundant places. [2024-11-22 21:52:28,444 INFO L231 Difference]: Finished difference. Result has 166 places, 282 transitions, 5121 flow [2024-11-22 21:52:28,444 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5121, PETRI_PLACES=166, PETRI_TRANSITIONS=282} [2024-11-22 21:52:28,445 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 126 predicate places. [2024-11-22 21:52:28,445 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 282 transitions, 5121 flow [2024-11-22 21:52:28,445 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.1) internal successors, (151), 10 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:28,445 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:28,445 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:28,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:28,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:28,646 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:52:28,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:28,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1064127651, now seen corresponding path program 11 times [2024-11-22 21:52:28,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:28,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120833736] [2024-11-22 21:52:28,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:52:28,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:28,662 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-22 21:52:28,662 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:29,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120833736] [2024-11-22 21:52:29,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120833736] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:29,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872045229] [2024-11-22 21:52:29,572 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:52:29,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:29,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:29,573 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) [2024-11-22 21:52:29,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 21:52:29,634 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-11-22 21:52:29,634 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:29,635 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-22 21:52:29,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:30,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:30,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:52:30,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 56 [2024-11-22 21:52:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:52:30,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872045229] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:30,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:30,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 15] total 49 [2024-11-22 21:52:30,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247058740] [2024-11-22 21:52:30,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:30,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-22 21:52:30,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:30,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-22 21:52:30,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2281, Unknown=0, NotChecked=0, Total=2450 [2024-11-22 21:52:30,724 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-22 21:52:30,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 282 transitions, 5121 flow. Second operand has 50 states, 50 states have (on average 8.9) internal successors, (445), 50 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:30,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:30,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-22 21:52:30,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:34,124 INFO L124 PetriNetUnfolderBase]: 2924/5310 cut-off events. [2024-11-22 21:52:34,124 INFO L125 PetriNetUnfolderBase]: For 78914/78914 co-relation queries the response was YES. [2024-11-22 21:52:34,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37158 conditions, 5310 events. 2924/5310 cut-off events. For 78914/78914 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 32453 event pairs, 115 based on Foata normal form. 2/5312 useless extension candidates. Maximal degree in co-relation 37099. Up to 1387 conditions per place. [2024-11-22 21:52:34,169 INFO L140 encePairwiseOnDemand]: 26/40 looper letters, 336 selfloop transitions, 291 changer transitions 22/651 dead transitions. [2024-11-22 21:52:34,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 651 transitions, 10504 flow [2024-11-22 21:52:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-22 21:52:34,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-11-22 21:52:34,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 715 transitions. [2024-11-22 21:52:34,171 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31359649122807015 [2024-11-22 21:52:34,171 INFO L175 Difference]: Start difference. First operand has 166 places, 282 transitions, 5121 flow. Second operand 57 states and 715 transitions. [2024-11-22 21:52:34,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 651 transitions, 10504 flow [2024-11-22 21:52:34,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 651 transitions, 9984 flow, removed 102 selfloop flow, removed 6 redundant places. [2024-11-22 21:52:34,342 INFO L231 Difference]: Finished difference. Result has 224 places, 416 transitions, 7924 flow [2024-11-22 21:52:34,342 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4825, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=7924, PETRI_PLACES=224, PETRI_TRANSITIONS=416} [2024-11-22 21:52:34,342 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 184 predicate places. [2024-11-22 21:52:34,342 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 416 transitions, 7924 flow [2024-11-22 21:52:34,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 8.9) internal successors, (445), 50 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:34,343 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:34,343 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:34,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:34,543 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,SelfDestructingSolverStorable23 [2024-11-22 21:52:34,543 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:52:34,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:34,544 INFO L85 PathProgramCache]: Analyzing trace with hash -664421047, now seen corresponding path program 12 times [2024-11-22 21:52:34,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:34,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448372936] [2024-11-22 21:52:34,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:52:34,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:34,560 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-22 21:52:34,560 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:35,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:35,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448372936] [2024-11-22 21:52:35,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448372936] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:35,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405076411] [2024-11-22 21:52:35,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:52:35,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:35,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:35,538 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) [2024-11-22 21:52:35,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 21:52:35,626 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-22 21:52:35,626 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:35,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-22 21:52:35,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:36,365 INFO L349 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2024-11-22 21:52:36,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 20 [2024-11-22 21:52:36,595 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:36,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:37,430 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-11-22 21:52:37,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 56 [2024-11-22 21:52:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:38,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405076411] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:38,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:38,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 61 [2024-11-22 21:52:38,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605046043] [2024-11-22 21:52:38,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:38,038 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-22 21:52:38,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:38,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-22 21:52:38,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=3345, Unknown=0, NotChecked=0, Total=3782 [2024-11-22 21:52:38,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-22 21:52:38,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 416 transitions, 7924 flow. Second operand has 62 states, 62 states have (on average 8.693548387096774) internal successors, (539), 62 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:38,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:38,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-22 21:52:38,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:53,599 INFO L124 PetriNetUnfolderBase]: 9349/17292 cut-off events. [2024-11-22 21:52:53,600 INFO L125 PetriNetUnfolderBase]: For 338469/338469 co-relation queries the response was YES. [2024-11-22 21:52:53,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129443 conditions, 17292 events. 9349/17292 cut-off events. For 338469/338469 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 129747 event pairs, 651 based on Foata normal form. 182/17474 useless extension candidates. Maximal degree in co-relation 129371. Up to 4259 conditions per place. [2024-11-22 21:52:53,714 INFO L140 encePairwiseOnDemand]: 23/40 looper letters, 533 selfloop transitions, 552 changer transitions 664/1751 dead transitions. [2024-11-22 21:52:53,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1751 transitions, 32623 flow [2024-11-22 21:52:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2024-11-22 21:52:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2024-11-22 21:52:53,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 1545 transitions. [2024-11-22 21:52:53,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3245798319327731 [2024-11-22 21:52:53,716 INFO L175 Difference]: Start difference. First operand has 224 places, 416 transitions, 7924 flow. Second operand 119 states and 1545 transitions. [2024-11-22 21:52:53,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1751 transitions, 32623 flow [2024-11-22 21:52:54,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1751 transitions, 32244 flow, removed 152 selfloop flow, removed 12 redundant places. [2024-11-22 21:52:54,788 INFO L231 Difference]: Finished difference. Result has 378 places, 730 transitions, 15768 flow [2024-11-22 21:52:54,789 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=7661, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=119, PETRI_FLOW=15768, PETRI_PLACES=378, PETRI_TRANSITIONS=730} [2024-11-22 21:52:54,789 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 338 predicate places. [2024-11-22 21:52:54,789 INFO L471 AbstractCegarLoop]: Abstraction has has 378 places, 730 transitions, 15768 flow [2024-11-22 21:52:54,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 8.693548387096774) internal successors, (539), 62 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:54,790 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:54,790 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:54,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:54,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:54,991 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-11-22 21:52:54,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:54,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1039865505, now seen corresponding path program 13 times [2024-11-22 21:52:54,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:54,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313363252] [2024-11-22 21:52:54,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:52:54,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:55,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:55,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313363252] [2024-11-22 21:52:55,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313363252] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:55,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805564458] [2024-11-22 21:52:55,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:52:55,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:55,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:55,822 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) [2024-11-22 21:52:55,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 21:52:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:55,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-22 21:52:55,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:56,625 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:57,079 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:52:57,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 53 [2024-11-22 21:52:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:57,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805564458] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:57,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:57,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 57 [2024-11-22 21:52:57,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128906182] [2024-11-22 21:52:57,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:57,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-22 21:52:57,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:57,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-22 21:52:57,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2966, Unknown=0, NotChecked=0, Total=3306 [2024-11-22 21:52:57,536 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-11-22 21:52:57,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 730 transitions, 15768 flow. Second operand has 58 states, 58 states have (on average 8.810344827586206) internal successors, (511), 58 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:57,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:57,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-11-22 21:52:57,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand