./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.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 be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:44:09,367 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:44:09,441 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:44:09,449 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:44:09,450 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:44:09,485 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:44:09,487 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:44:09,488 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:44:09,489 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:44:09,490 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:44:09,491 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:44:09,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:44:09,492 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:44:09,493 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:44:09,493 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:44:09,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:44:09,494 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:44:09,494 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:44:09,494 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:44:09,495 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:44:09,495 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:44:09,498 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:44:09,498 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:44:09,498 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:44:09,499 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:44:09,499 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:44:09,499 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:44:09,499 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:44:09,500 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:44:09,500 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:44:09,500 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:44:09,500 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:44:09,501 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:44:09,501 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:44:09,501 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:44:09,501 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:44:09,502 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:44:09,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:44:09,502 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:44:09,502 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:44:09,503 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:44:09,504 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:44:09,505 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be394a9cdc866c1e1426a3fe296e99873bcf37ee5e7e1c9e487b239a3e0a8fbe [2024-11-20 17:44:09,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:44:09,803 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:44:09,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:44:09,808 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:44:09,808 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:44:09,810 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-11-20 17:44:11,299 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:44:11,474 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:44:11,475 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-ring.wvr.c [2024-11-20 17:44:11,483 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a0da7b7/8f216d5dbbc943e88a96064f0cdad842/FLAG9bd4bc67b [2024-11-20 17:44:11,498 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90a0da7b7/8f216d5dbbc943e88a96064f0cdad842 [2024-11-20 17:44:11,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:44:11,503 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:44:11,505 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:44:11,506 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:44:11,515 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:44:11,516 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,519 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba3e709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11, skipping insertion in model container [2024-11-20 17:44:11,519 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,551 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:44:11,783 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:44:11,786 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:44:11,795 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:44:11,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:44:11,848 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:44:11,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11 WrapperNode [2024-11-20 17:44:11,849 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:44:11,850 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:44:11,851 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:44:11,851 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:44:11,858 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,869 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,899 INFO L138 Inliner]: procedures = 24, calls = 47, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 314 [2024-11-20 17:44:11,899 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:44:11,900 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:44:11,900 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:44:11,900 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:44:11,911 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,911 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,919 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,941 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-20 17:44:11,945 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,945 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,954 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,959 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,961 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,962 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,969 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:44:11,974 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:44:11,974 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:44:11,974 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:44:11,975 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (1/1) ... [2024-11-20 17:44:11,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:44:11,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:12,011 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) [2024-11-20 17:44:12,018 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 [2024-11-20 17:44:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:44:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:44:12,070 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:44:12,070 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:44:12,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:44:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 17:44:12,071 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 17:44:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:44:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:44:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:44:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:44:12,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 17:44:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 17:44:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:44:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:44:12,072 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:44:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:44:12,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:44:12,074 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:44:12,173 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:44:12,177 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:44:12,748 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:44:12,749 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:44:13,116 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:44:13,117 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-20 17:44:13,117 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:44:13 BoogieIcfgContainer [2024-11-20 17:44:13,118 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:44:13,121 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:44:13,121 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:44:13,125 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:44:13,126 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:44:11" (1/3) ... [2024-11-20 17:44:13,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292e3058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:44:13, skipping insertion in model container [2024-11-20 17:44:13,127 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:11" (2/3) ... [2024-11-20 17:44:13,127 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@292e3058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:44:13, skipping insertion in model container [2024-11-20 17:44:13,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:44:13" (3/3) ... [2024-11-20 17:44:13,129 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-ring.wvr.c [2024-11-20 17:44:13,146 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:44:13,147 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-20 17:44:13,147 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:44:13,325 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:44:13,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 73 transitions, 167 flow [2024-11-20 17:44:13,406 INFO L124 PetriNetUnfolderBase]: 8/70 cut-off events. [2024-11-20 17:44:13,406 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:44:13,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 70 events. 8/70 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 179 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 51. Up to 2 conditions per place. [2024-11-20 17:44:13,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 75 places, 73 transitions, 167 flow [2024-11-20 17:44:13,415 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 69 transitions, 156 flow [2024-11-20 17:44:13,423 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:44:13,429 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;@5273b35a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:44:13,430 INFO L334 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2024-11-20 17:44:13,433 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:44:13,433 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:44:13,433 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:44:13,433 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:13,434 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:44:13,435 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:13,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:13,440 INFO L85 PathProgramCache]: Analyzing trace with hash 944471, now seen corresponding path program 1 times [2024-11-20 17:44:13,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:13,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730443606] [2024-11-20 17:44:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:13,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:13,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730443606] [2024-11-20 17:44:13,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730443606] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:13,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:13,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:44:13,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77406462] [2024-11-20 17:44:13,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:13,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:44:13,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:13,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:44:13,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:44:13,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-20 17:44:13,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:13,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:13,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-20 17:44:13,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:14,985 INFO L124 PetriNetUnfolderBase]: 5811/9209 cut-off events. [2024-11-20 17:44:14,986 INFO L125 PetriNetUnfolderBase]: For 359/359 co-relation queries the response was YES. [2024-11-20 17:44:15,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17453 conditions, 9209 events. 5811/9209 cut-off events. For 359/359 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63097 event pairs, 5236 based on Foata normal form. 514/6076 useless extension candidates. Maximal degree in co-relation 16841. Up to 7878 conditions per place. [2024-11-20 17:44:15,072 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 47 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2024-11-20 17:44:15,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 62 transitions, 240 flow [2024-11-20 17:44:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:44:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:44:15,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-11-20 17:44:15,086 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4840182648401826 [2024-11-20 17:44:15,088 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 156 flow. Second operand 3 states and 106 transitions. [2024-11-20 17:44:15,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 62 transitions, 240 flow [2024-11-20 17:44:15,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 62 transitions, 228 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:44:15,101 INFO L231 Difference]: Finished difference. Result has 62 places, 62 transitions, 134 flow [2024-11-20 17:44:15,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=62} [2024-11-20 17:44:15,107 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -9 predicate places. [2024-11-20 17:44:15,107 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 62 transitions, 134 flow [2024-11-20 17:44:15,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:15,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:15,108 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:44:15,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:44:15,109 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:15,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:15,109 INFO L85 PathProgramCache]: Analyzing trace with hash 944472, now seen corresponding path program 1 times [2024-11-20 17:44:15,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:15,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845009604] [2024-11-20 17:44:15,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:15,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:15,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:15,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845009604] [2024-11-20 17:44:15,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845009604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:15,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:15,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:44:15,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40987835] [2024-11-20 17:44:15,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:15,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:44:15,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:15,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:44:15,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:44:15,467 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-20 17:44:15,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 62 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:15,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:15,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-20 17:44:15,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:16,620 INFO L124 PetriNetUnfolderBase]: 5812/9212 cut-off events. [2024-11-20 17:44:16,620 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-20 17:44:16,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17240 conditions, 9212 events. 5812/9212 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63115 event pairs, 5236 based on Foata normal form. 0/5562 useless extension candidates. Maximal degree in co-relation 17203. Up to 7891 conditions per place. [2024-11-20 17:44:16,685 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 51 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-11-20 17:44:16,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 65 transitions, 250 flow [2024-11-20 17:44:16,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:44:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:44:16,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-11-20 17:44:16,689 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4246575342465753 [2024-11-20 17:44:16,689 INFO L175 Difference]: Start difference. First operand has 62 places, 62 transitions, 134 flow. Second operand 4 states and 124 transitions. [2024-11-20 17:44:16,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 65 transitions, 250 flow [2024-11-20 17:44:16,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 65 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:16,692 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 157 flow [2024-11-20 17:44:16,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=157, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-11-20 17:44:16,693 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -6 predicate places. [2024-11-20 17:44:16,694 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 157 flow [2024-11-20 17:44:16,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:16,695 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:16,695 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-20 17:44:16,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:44:16,696 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:16,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:16,697 INFO L85 PathProgramCache]: Analyzing trace with hash 29280847, now seen corresponding path program 1 times [2024-11-20 17:44:16,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:16,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256634894] [2024-11-20 17:44:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:16,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:16,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:16,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256634894] [2024-11-20 17:44:16,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256634894] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:16,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:16,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:44:16,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274249633] [2024-11-20 17:44:16,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:16,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:44:16,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:16,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:44:16,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:44:16,963 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-20 17:44:16,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 157 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-11-20 17:44:16,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:16,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-20 17:44:16,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:17,890 INFO L124 PetriNetUnfolderBase]: 5813/9215 cut-off events. [2024-11-20 17:44:17,890 INFO L125 PetriNetUnfolderBase]: For 76/76 co-relation queries the response was YES. [2024-11-20 17:44:17,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17257 conditions, 9215 events. 5813/9215 cut-off events. For 76/76 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63116 event pairs, 5236 based on Foata normal form. 0/5564 useless extension candidates. Maximal degree in co-relation 17232. Up to 7890 conditions per place. [2024-11-20 17:44:17,937 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 51 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-11-20 17:44:17,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 68 transitions, 279 flow [2024-11-20 17:44:17,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:44:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:44:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-11-20 17:44:17,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39452054794520547 [2024-11-20 17:44:17,940 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 157 flow. Second operand 5 states and 144 transitions. [2024-11-20 17:44:17,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 68 transitions, 279 flow [2024-11-20 17:44:17,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 68 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:44:17,942 INFO L231 Difference]: Finished difference. Result has 70 places, 68 transitions, 191 flow [2024-11-20 17:44:17,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=70, PETRI_TRANSITIONS=68} [2024-11-20 17:44:17,943 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, -1 predicate places. [2024-11-20 17:44:17,943 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 68 transitions, 191 flow [2024-11-20 17:44:17,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 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) [2024-11-20 17:44:17,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:17,944 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:44:17,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:44:17,944 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:17,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:17,945 INFO L85 PathProgramCache]: Analyzing trace with hash 907668153, now seen corresponding path program 1 times [2024-11-20 17:44:17,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:17,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978353556] [2024-11-20 17:44:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:17,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:17,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:18,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:18,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:18,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978353556] [2024-11-20 17:44:18,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978353556] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:18,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025210868] [2024-11-20 17:44:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:18,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:18,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:18,125 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) [2024-11-20 17:44:18,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:44:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:18,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:44:18,215 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:18,297 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 [2024-11-20 17:44:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:18,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:18,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:18,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025210868] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:18,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:18,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:44:18,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083266247] [2024-11-20 17:44:18,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:18,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:44:18,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:44:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:44:18,690 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-20 17:44:18,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 191 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 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) [2024-11-20 17:44:18,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:18,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-20 17:44:18,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:20,072 INFO L124 PetriNetUnfolderBase]: 5814/9217 cut-off events. [2024-11-20 17:44:20,073 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-20 17:44:20,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17280 conditions, 9217 events. 5814/9217 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63148 event pairs, 5236 based on Foata normal form. 0/5569 useless extension candidates. Maximal degree in co-relation 17242. Up to 7891 conditions per place. [2024-11-20 17:44:20,123 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 50 selfloop transitions, 10 changer transitions 0/70 dead transitions. [2024-11-20 17:44:20,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 70 transitions, 322 flow [2024-11-20 17:44:20,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:44:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:44:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-11-20 17:44:20,125 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3339041095890411 [2024-11-20 17:44:20,125 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 191 flow. Second operand 8 states and 195 transitions. [2024-11-20 17:44:20,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 70 transitions, 322 flow [2024-11-20 17:44:20,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 321 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:44:20,128 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 221 flow [2024-11-20 17:44:20,128 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=221, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-11-20 17:44:20,129 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-11-20 17:44:20,129 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 221 flow [2024-11-20 17:44:20,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 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) [2024-11-20 17:44:20,130 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:20,130 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-20 17:44:20,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-20 17:44:20,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:20,335 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:20,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:20,335 INFO L85 PathProgramCache]: Analyzing trace with hash 907707653, now seen corresponding path program 1 times [2024-11-20 17:44:20,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:20,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20373831] [2024-11-20 17:44:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:20,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:20,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:20,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:20,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20373831] [2024-11-20 17:44:20,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20373831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:20,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:20,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:44:20,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178287705] [2024-11-20 17:44:20,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:20,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:44:20,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:20,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:44:20,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:44:20,580 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-20 17:44:20,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2024-11-20 17:44:20,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:20,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-20 17:44:20,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:21,432 INFO L124 PetriNetUnfolderBase]: 5815/9220 cut-off events. [2024-11-20 17:44:21,432 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-20 17:44:21,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17296 conditions, 9220 events. 5815/9220 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 63161 event pairs, 5236 based on Foata normal form. 0/5571 useless extension candidates. Maximal degree in co-relation 17250. Up to 7895 conditions per place. [2024-11-20 17:44:21,500 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 54 selfloop transitions, 9 changer transitions 0/73 dead transitions. [2024-11-20 17:44:21,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 353 flow [2024-11-20 17:44:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:44:21,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:44:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-20 17:44:21,503 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3917808219178082 [2024-11-20 17:44:21,503 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 221 flow. Second operand 5 states and 143 transitions. [2024-11-20 17:44:21,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 353 flow [2024-11-20 17:44:21,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 73 transitions, 306 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-20 17:44:21,509 INFO L231 Difference]: Finished difference. Result has 73 places, 73 transitions, 217 flow [2024-11-20 17:44:21,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=217, PETRI_PLACES=73, PETRI_TRANSITIONS=73} [2024-11-20 17:44:21,510 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-20 17:44:21,510 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 73 transitions, 217 flow [2024-11-20 17:44:21,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2024-11-20 17:44:21,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:21,511 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-20 17:44:21,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:44:21,511 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:21,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:21,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1925847176, now seen corresponding path program 1 times [2024-11-20 17:44:21,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:21,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509736717] [2024-11-20 17:44:21,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:21,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:21,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509736717] [2024-11-20 17:44:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509736717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406543195] [2024-11-20 17:44:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:21,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:21,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:21,746 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) [2024-11-20 17:44:21,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:44:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:21,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:44:21,825 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:21,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:44:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:21,971 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:22,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:22,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406543195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:22,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:22,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-20 17:44:22,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870093446] [2024-11-20 17:44:22,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:22,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:44:22,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:44:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:44:22,241 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-20 17:44:22,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 217 flow. Second operand has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 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) [2024-11-20 17:44:22,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:22,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-20 17:44:22,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:23,169 INFO L124 PetriNetUnfolderBase]: 5815/9219 cut-off events. [2024-11-20 17:44:23,169 INFO L125 PetriNetUnfolderBase]: For 81/81 co-relation queries the response was YES. [2024-11-20 17:44:23,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17288 conditions, 9219 events. 5815/9219 cut-off events. For 81/81 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 63136 event pairs, 5236 based on Foata normal form. 0/5573 useless extension candidates. Maximal degree in co-relation 17239. Up to 7885 conditions per place. [2024-11-20 17:44:23,222 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 47 selfloop transitions, 15 changer transitions 0/72 dead transitions. [2024-11-20 17:44:23,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 337 flow [2024-11-20 17:44:23,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:44:23,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:44:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-11-20 17:44:23,224 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34442270058708413 [2024-11-20 17:44:23,224 INFO L175 Difference]: Start difference. First operand has 73 places, 73 transitions, 217 flow. Second operand 7 states and 176 transitions. [2024-11-20 17:44:23,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 337 flow [2024-11-20 17:44:23,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 72 transitions, 330 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:23,226 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 236 flow [2024-11-20 17:44:23,227 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=236, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2024-11-20 17:44:23,228 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2024-11-20 17:44:23,228 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 236 flow [2024-11-20 17:44:23,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 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) [2024-11-20 17:44:23,228 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:23,228 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-20 17:44:23,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-20 17:44:23,429 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,SelfDestructingSolverStorable5 [2024-11-20 17:44:23,430 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:23,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:23,430 INFO L85 PathProgramCache]: Analyzing trace with hash 428724105, now seen corresponding path program 1 times [2024-11-20 17:44:23,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:23,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871433004] [2024-11-20 17:44:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:23,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:23,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:23,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:23,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871433004] [2024-11-20 17:44:23,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871433004] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:23,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612532447] [2024-11-20 17:44:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:23,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:23,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:23,707 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) [2024-11-20 17:44:23,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:44:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:23,798 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:44:23,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:23,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:44:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:23,944 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:24,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612532447] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:24,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:24,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-20 17:44:24,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227462032] [2024-11-20 17:44:24,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:24,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:44:24,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:24,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:44:24,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:44:24,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-20 17:44:24,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 236 flow. Second operand has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 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) [2024-11-20 17:44:24,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:24,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-20 17:44:24,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:25,199 INFO L124 PetriNetUnfolderBase]: 5815/9218 cut-off events. [2024-11-20 17:44:25,199 INFO L125 PetriNetUnfolderBase]: For 82/82 co-relation queries the response was YES. [2024-11-20 17:44:25,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17296 conditions, 9218 events. 5815/9218 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 63189 event pairs, 5236 based on Foata normal form. 0/5573 useless extension candidates. Maximal degree in co-relation 17241. Up to 7885 conditions per place. [2024-11-20 17:44:25,262 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 43 selfloop transitions, 18 changer transitions 0/71 dead transitions. [2024-11-20 17:44:25,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 71 transitions, 354 flow [2024-11-20 17:44:25,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:44:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:44:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-11-20 17:44:25,264 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3424657534246575 [2024-11-20 17:44:25,264 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 236 flow. Second operand 7 states and 175 transitions. [2024-11-20 17:44:25,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 71 transitions, 354 flow [2024-11-20 17:44:25,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 71 transitions, 327 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-20 17:44:25,269 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 241 flow [2024-11-20 17:44:25,271 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=241, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-11-20 17:44:25,272 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2024-11-20 17:44:25,272 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 241 flow [2024-11-20 17:44:25,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 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) [2024-11-20 17:44:25,273 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:25,273 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:25,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:44:25,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:25,477 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:25,477 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:25,478 INFO L85 PathProgramCache]: Analyzing trace with hash 409480633, now seen corresponding path program 1 times [2024-11-20 17:44:25,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:25,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698316665] [2024-11-20 17:44:25,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:25,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:25,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:25,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:25,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698316665] [2024-11-20 17:44:25,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698316665] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:25,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:25,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:44:25,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871782272] [2024-11-20 17:44:25,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:25,561 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:44:25,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:25,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:44:25,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:44:25,572 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-20 17:44:25,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:25,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:25,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-20 17:44:25,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:26,444 INFO L124 PetriNetUnfolderBase]: 6017/9598 cut-off events. [2024-11-20 17:44:26,444 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-20 17:44:26,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18037 conditions, 9598 events. 6017/9598 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 65354 event pairs, 5423 based on Foata normal form. 140/6048 useless extension candidates. Maximal degree in co-relation 17253. Up to 7896 conditions per place. [2024-11-20 17:44:26,511 INFO L140 encePairwiseOnDemand]: 57/73 looper letters, 82 selfloop transitions, 7 changer transitions 1/100 dead transitions. [2024-11-20 17:44:26,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 100 transitions, 528 flow [2024-11-20 17:44:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:44:26,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:44:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2024-11-20 17:44:26,514 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2024-11-20 17:44:26,514 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 241 flow. Second operand 5 states and 190 transitions. [2024-11-20 17:44:26,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 100 transitions, 528 flow [2024-11-20 17:44:26,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 100 transitions, 470 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-20 17:44:26,521 INFO L231 Difference]: Finished difference. Result has 76 places, 75 transitions, 270 flow [2024-11-20 17:44:26,522 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=270, PETRI_PLACES=76, PETRI_TRANSITIONS=75} [2024-11-20 17:44:26,524 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2024-11-20 17:44:26,524 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 75 transitions, 270 flow [2024-11-20 17:44:26,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:26,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:26,525 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:26,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:44:26,526 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:26,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:26,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1209310984, now seen corresponding path program 1 times [2024-11-20 17:44:26,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:26,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445534110] [2024-11-20 17:44:26,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:26,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:44:26,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:26,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445534110] [2024-11-20 17:44:26,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445534110] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:26,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:26,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:44:26,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325067434] [2024-11-20 17:44:26,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:26,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:44:26,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:26,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:44:26,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:44:26,721 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-20 17:44:26,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 75 transitions, 270 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:26,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:26,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-20 17:44:26,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:27,261 INFO L124 PetriNetUnfolderBase]: 4591/7317 cut-off events. [2024-11-20 17:44:27,262 INFO L125 PetriNetUnfolderBase]: For 574/574 co-relation queries the response was YES. [2024-11-20 17:44:27,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14879 conditions, 7317 events. 4591/7317 cut-off events. For 574/574 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 47248 event pairs, 4099 based on Foata normal form. 0/4764 useless extension candidates. Maximal degree in co-relation 14122. Up to 6256 conditions per place. [2024-11-20 17:44:27,283 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 55 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-20 17:44:27,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 72 transitions, 382 flow [2024-11-20 17:44:27,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:44:27,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:44:27,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-11-20 17:44:27,285 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36712328767123287 [2024-11-20 17:44:27,285 INFO L175 Difference]: Start difference. First operand has 76 places, 75 transitions, 270 flow. Second operand 5 states and 134 transitions. [2024-11-20 17:44:27,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 72 transitions, 382 flow [2024-11-20 17:44:27,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 72 transitions, 377 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:27,288 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 267 flow [2024-11-20 17:44:27,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=267, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-11-20 17:44:27,288 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-11-20 17:44:27,288 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 267 flow [2024-11-20 17:44:27,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:27,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:27,289 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:27,289 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 17:44:27,289 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:27,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:27,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1209310983, now seen corresponding path program 1 times [2024-11-20 17:44:27,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:27,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714635790] [2024-11-20 17:44:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:27,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:27,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:27,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714635790] [2024-11-20 17:44:27,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714635790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:27,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493378583] [2024-11-20 17:44:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:27,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:27,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:27,550 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) [2024-11-20 17:44:27,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:44:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:27,638 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:44:27,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:27,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:44:27,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:44:27,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-20 17:44:27,718 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 17:44:27,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-20 17:44:27,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:44:27,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-20 17:44:27,749 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:44:27,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:44:27,772 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:27,773 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:44:27,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493378583] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:27,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:44:27,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-11-20 17:44:27,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034096879] [2024-11-20 17:44:27,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:27,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:44:27,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:27,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:44:27,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-11-20 17:44:27,804 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-20 17:44:27,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 267 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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) [2024-11-20 17:44:27,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:27,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-20 17:44:27,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:28,200 INFO L124 PetriNetUnfolderBase]: 3361/5408 cut-off events. [2024-11-20 17:44:28,200 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2024-11-20 17:44:28,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10647 conditions, 5408 events. 3361/5408 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 32670 event pairs, 2963 based on Foata normal form. 0/3834 useless extension candidates. Maximal degree in co-relation 9842. Up to 4610 conditions per place. [2024-11-20 17:44:28,224 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 55 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2024-11-20 17:44:28,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 69 transitions, 373 flow [2024-11-20 17:44:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:44:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:44:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-20 17:44:28,225 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3904109589041096 [2024-11-20 17:44:28,226 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 267 flow. Second operand 4 states and 114 transitions. [2024-11-20 17:44:28,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 69 transitions, 373 flow [2024-11-20 17:44:28,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 69 transitions, 362 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:44:28,228 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 252 flow [2024-11-20 17:44:28,229 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=252, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-11-20 17:44:28,229 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2024-11-20 17:44:28,229 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 252 flow [2024-11-20 17:44:28,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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) [2024-11-20 17:44:28,230 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:28,230 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:28,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:44:28,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:28,434 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:28,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:28,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1166066191, now seen corresponding path program 1 times [2024-11-20 17:44:28,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:28,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699885174] [2024-11-20 17:44:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:28,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:44:28,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:28,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699885174] [2024-11-20 17:44:28,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699885174] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:28,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:28,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:44:28,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77997246] [2024-11-20 17:44:28,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:28,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:44:28,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:28,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:44:28,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:44:28,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-20 17:44:28,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-11-20 17:44:28,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:28,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-20 17:44:28,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:28,876 INFO L124 PetriNetUnfolderBase]: 4121/6672 cut-off events. [2024-11-20 17:44:28,876 INFO L125 PetriNetUnfolderBase]: For 735/735 co-relation queries the response was YES. [2024-11-20 17:44:28,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13372 conditions, 6672 events. 4121/6672 cut-off events. For 735/735 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 41789 event pairs, 1846 based on Foata normal form. 114/4805 useless extension candidates. Maximal degree in co-relation 12233. Up to 3446 conditions per place. [2024-11-20 17:44:28,905 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 77 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2024-11-20 17:44:28,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 89 transitions, 458 flow [2024-11-20 17:44:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:44:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:44:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-11-20 17:44:28,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5753424657534246 [2024-11-20 17:44:28,906 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 252 flow. Second operand 3 states and 126 transitions. [2024-11-20 17:44:28,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 89 transitions, 458 flow [2024-11-20 17:44:28,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 89 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:28,909 INFO L231 Difference]: Finished difference. Result has 73 places, 70 transitions, 263 flow [2024-11-20 17:44:28,909 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=263, PETRI_PLACES=73, PETRI_TRANSITIONS=70} [2024-11-20 17:44:28,909 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-20 17:44:28,909 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 70 transitions, 263 flow [2024-11-20 17:44:28,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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) [2024-11-20 17:44:28,909 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:28,910 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:28,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 17:44:28,910 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:28,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:28,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1326810422, now seen corresponding path program 1 times [2024-11-20 17:44:28,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:28,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20855835] [2024-11-20 17:44:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:28,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:28,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:28,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:28,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:28,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20855835] [2024-11-20 17:44:28,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20855835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:28,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:28,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:44:28,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705400637] [2024-11-20 17:44:28,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:28,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:44:28,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:28,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:44:28,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:44:28,969 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-20 17:44:28,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 70 transitions, 263 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:28,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:28,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-20 17:44:28,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:29,349 INFO L124 PetriNetUnfolderBase]: 3232/5161 cut-off events. [2024-11-20 17:44:29,349 INFO L125 PetriNetUnfolderBase]: For 791/791 co-relation queries the response was YES. [2024-11-20 17:44:29,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11077 conditions, 5161 events. 3232/5161 cut-off events. For 791/791 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 30650 event pairs, 1349 based on Foata normal form. 71/3804 useless extension candidates. Maximal degree in co-relation 10777. Up to 4054 conditions per place. [2024-11-20 17:44:29,362 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 67 selfloop transitions, 2 changer transitions 5/84 dead transitions. [2024-11-20 17:44:29,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 84 transitions, 447 flow [2024-11-20 17:44:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:44:29,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:44:29,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 120 transitions. [2024-11-20 17:44:29,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.547945205479452 [2024-11-20 17:44:29,363 INFO L175 Difference]: Start difference. First operand has 73 places, 70 transitions, 263 flow. Second operand 3 states and 120 transitions. [2024-11-20 17:44:29,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 84 transitions, 447 flow [2024-11-20 17:44:29,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 84 transitions, 445 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:44:29,366 INFO L231 Difference]: Finished difference. Result has 75 places, 66 transitions, 238 flow [2024-11-20 17:44:29,366 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=75, PETRI_TRANSITIONS=66} [2024-11-20 17:44:29,367 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-11-20 17:44:29,367 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 66 transitions, 238 flow [2024-11-20 17:44:29,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:29,367 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:29,367 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:29,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 17:44:29,368 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:29,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:29,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1760590007, now seen corresponding path program 1 times [2024-11-20 17:44:29,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:29,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399377402] [2024-11-20 17:44:29,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:29,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:29,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:44:29,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:29,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399377402] [2024-11-20 17:44:29,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399377402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:29,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:29,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:44:29,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401242476] [2024-11-20 17:44:29,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:29,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:44:29,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:29,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:44:29,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:44:29,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-20 17:44:29,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 66 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:29,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:29,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-20 17:44:29,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:29,675 INFO L124 PetriNetUnfolderBase]: 2197/3548 cut-off events. [2024-11-20 17:44:29,675 INFO L125 PetriNetUnfolderBase]: For 700/705 co-relation queries the response was YES. [2024-11-20 17:44:29,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8156 conditions, 3548 events. 2197/3548 cut-off events. For 700/705 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 20592 event pairs, 1219 based on Foata normal form. 15/2693 useless extension candidates. Maximal degree in co-relation 8111. Up to 3137 conditions per place. [2024-11-20 17:44:29,689 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 63 selfloop transitions, 3 changer transitions 0/76 dead transitions. [2024-11-20 17:44:29,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 76 transitions, 396 flow [2024-11-20 17:44:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:44:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:44:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 114 transitions. [2024-11-20 17:44:29,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205479452054794 [2024-11-20 17:44:29,690 INFO L175 Difference]: Start difference. First operand has 75 places, 66 transitions, 238 flow. Second operand 3 states and 114 transitions. [2024-11-20 17:44:29,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 76 transitions, 396 flow [2024-11-20 17:44:29,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 386 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:29,693 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 251 flow [2024-11-20 17:44:29,693 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=251, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2024-11-20 17:44:29,694 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2024-11-20 17:44:29,694 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 251 flow [2024-11-20 17:44:29,694 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:29,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:29,694 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:29,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 17:44:29,695 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:29,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:29,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1726459373, now seen corresponding path program 1 times [2024-11-20 17:44:29,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:29,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708211744] [2024-11-20 17:44:29,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:29,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:44:29,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:29,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708211744] [2024-11-20 17:44:29,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708211744] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:29,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:29,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:44:29,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405971981] [2024-11-20 17:44:29,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:29,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:44:29,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:29,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:44:29,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:44:29,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-20 17:44:29,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2024-11-20 17:44:29,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:29,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-20 17:44:29,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:30,238 INFO L124 PetriNetUnfolderBase]: 2336/3863 cut-off events. [2024-11-20 17:44:30,239 INFO L125 PetriNetUnfolderBase]: For 1518/1518 co-relation queries the response was YES. [2024-11-20 17:44:30,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9242 conditions, 3863 events. 2336/3863 cut-off events. For 1518/1518 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22815 event pairs, 1929 based on Foata normal form. 40/3015 useless extension candidates. Maximal degree in co-relation 9196. Up to 3243 conditions per place. [2024-11-20 17:44:30,258 INFO L140 encePairwiseOnDemand]: 65/73 looper letters, 54 selfloop transitions, 3 changer transitions 22/89 dead transitions. [2024-11-20 17:44:30,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 89 transitions, 481 flow [2024-11-20 17:44:30,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:44:30,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:44:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2024-11-20 17:44:30,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4657534246575342 [2024-11-20 17:44:30,259 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 251 flow. Second operand 5 states and 170 transitions. [2024-11-20 17:44:30,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 89 transitions, 481 flow [2024-11-20 17:44:30,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 89 transitions, 460 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:30,263 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 249 flow [2024-11-20 17:44:30,264 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2024-11-20 17:44:30,264 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2024-11-20 17:44:30,264 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 249 flow [2024-11-20 17:44:30,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 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) [2024-11-20 17:44:30,264 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:30,264 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:30,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-20 17:44:30,265 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:30,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:30,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1046662206, now seen corresponding path program 1 times [2024-11-20 17:44:30,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:30,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073250486] [2024-11-20 17:44:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:30,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:30,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:30,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073250486] [2024-11-20 17:44:30,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073250486] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:30,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:30,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:44:30,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540236268] [2024-11-20 17:44:30,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:30,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:44:30,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:30,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:44:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:44:30,389 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-20 17:44:30,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-20 17:44:30,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:30,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-20 17:44:30,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:30,615 INFO L124 PetriNetUnfolderBase]: 1554/2585 cut-off events. [2024-11-20 17:44:30,616 INFO L125 PetriNetUnfolderBase]: For 761/761 co-relation queries the response was YES. [2024-11-20 17:44:30,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6071 conditions, 2585 events. 1554/2585 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 14688 event pairs, 1234 based on Foata normal form. 0/2146 useless extension candidates. Maximal degree in co-relation 6022. Up to 2293 conditions per place. [2024-11-20 17:44:30,626 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 51 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2024-11-20 17:44:30,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 65 transitions, 351 flow [2024-11-20 17:44:30,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:44:30,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:44:30,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-20 17:44:30,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3506849315068493 [2024-11-20 17:44:30,629 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 249 flow. Second operand 5 states and 128 transitions. [2024-11-20 17:44:30,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 65 transitions, 351 flow [2024-11-20 17:44:30,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 65 transitions, 340 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-20 17:44:30,631 INFO L231 Difference]: Finished difference. Result has 75 places, 65 transitions, 238 flow [2024-11-20 17:44:30,631 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=238, PETRI_PLACES=75, PETRI_TRANSITIONS=65} [2024-11-20 17:44:30,632 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-11-20 17:44:30,632 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 65 transitions, 238 flow [2024-11-20 17:44:30,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-11-20 17:44:30,632 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:30,632 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:30,632 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 17:44:30,632 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:30,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:30,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1046662205, now seen corresponding path program 1 times [2024-11-20 17:44:30,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:30,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104911906] [2024-11-20 17:44:30,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:30,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:44:30,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:30,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104911906] [2024-11-20 17:44:30,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104911906] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:30,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954941473] [2024-11-20 17:44:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:30,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:30,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:30,864 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) [2024-11-20 17:44:30,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:44:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:30,965 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:44:30,967 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:30,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:44:31,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:44:31,025 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-20 17:44:31,031 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:44:31,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:44:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:44:31,082 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:44:31,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954941473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:31,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:44:31,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-20 17:44:31,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903205939] [2024-11-20 17:44:31,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:31,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:44:31,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:31,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:44:31,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-20 17:44:31,109 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-20 17:44:31,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 65 transitions, 238 flow. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2024-11-20 17:44:31,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:31,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-20 17:44:31,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:31,286 INFO L124 PetriNetUnfolderBase]: 1022/1763 cut-off events. [2024-11-20 17:44:31,286 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2024-11-20 17:44:31,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3992 conditions, 1763 events. 1022/1763 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9743 event pairs, 779 based on Foata normal form. 146/1663 useless extension candidates. Maximal degree in co-relation 3944. Up to 1522 conditions per place. [2024-11-20 17:44:31,292 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 50 selfloop transitions, 3 changer transitions 0/63 dead transitions. [2024-11-20 17:44:31,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 63 transitions, 338 flow [2024-11-20 17:44:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:44:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:44:31,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-11-20 17:44:31,294 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3732876712328767 [2024-11-20 17:44:31,294 INFO L175 Difference]: Start difference. First operand has 75 places, 65 transitions, 238 flow. Second operand 4 states and 109 transitions. [2024-11-20 17:44:31,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 63 transitions, 338 flow [2024-11-20 17:44:31,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 63 transitions, 332 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:44:31,296 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 232 flow [2024-11-20 17:44:31,296 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2024-11-20 17:44:31,297 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-20 17:44:31,297 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 232 flow [2024-11-20 17:44:31,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 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) [2024-11-20 17:44:31,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:31,297 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] [2024-11-20 17:44:31,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 17:44:31,501 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,SelfDestructingSolverStorable15 [2024-11-20 17:44:31,502 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:31,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:31,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1435455118, now seen corresponding path program 1 times [2024-11-20 17:44:31,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:31,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553701813] [2024-11-20 17:44:31,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:31,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:31,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:31,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553701813] [2024-11-20 17:44:31,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553701813] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:31,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:31,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:44:31,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37253680] [2024-11-20 17:44:31,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:31,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:44:31,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:31,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:44:31,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:44:31,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-20 17:44:31,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2024-11-20 17:44:31,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:31,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-20 17:44:31,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:31,932 INFO L124 PetriNetUnfolderBase]: 1301/2348 cut-off events. [2024-11-20 17:44:31,932 INFO L125 PetriNetUnfolderBase]: For 580/580 co-relation queries the response was YES. [2024-11-20 17:44:31,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5225 conditions, 2348 events. 1301/2348 cut-off events. For 580/580 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13719 event pairs, 1032 based on Foata normal form. 44/2112 useless extension candidates. Maximal degree in co-relation 5176. Up to 1533 conditions per place. [2024-11-20 17:44:31,937 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 50 selfloop transitions, 2 changer transitions 21/83 dead transitions. [2024-11-20 17:44:31,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 83 transitions, 435 flow [2024-11-20 17:44:31,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:44:31,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:44:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-11-20 17:44:31,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4931506849315068 [2024-11-20 17:44:31,938 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 232 flow. Second operand 4 states and 144 transitions. [2024-11-20 17:44:31,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 83 transitions, 435 flow [2024-11-20 17:44:31,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 83 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:31,940 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 232 flow [2024-11-20 17:44:31,940 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2024-11-20 17:44:31,940 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2024-11-20 17:44:31,940 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 232 flow [2024-11-20 17:44:31,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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) [2024-11-20 17:44:31,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:31,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:31,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 17:44:31,941 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:31,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:31,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2002134126, now seen corresponding path program 1 times [2024-11-20 17:44:31,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:31,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772755764] [2024-11-20 17:44:31,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:31,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:32,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:32,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772755764] [2024-11-20 17:44:32,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772755764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:32,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834918150] [2024-11-20 17:44:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:32,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:32,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:32,212 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) [2024-11-20 17:44:32,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:44:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:32,322 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:44:32,324 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:32,437 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:44:32,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834918150] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:32,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:44:32,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-20 17:44:32,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584701886] [2024-11-20 17:44:32,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:32,438 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:44:32,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:32,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:44:32,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-20 17:44:32,456 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-20 17:44:32,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 232 flow. Second operand has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 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) [2024-11-20 17:44:32,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:32,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-20 17:44:32,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:32,643 INFO L124 PetriNetUnfolderBase]: 794/1431 cut-off events. [2024-11-20 17:44:32,643 INFO L125 PetriNetUnfolderBase]: For 418/418 co-relation queries the response was YES. [2024-11-20 17:44:32,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3294 conditions, 1431 events. 794/1431 cut-off events. For 418/418 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7686 event pairs, 602 based on Foata normal form. 0/1306 useless extension candidates. Maximal degree in co-relation 3246. Up to 1191 conditions per place. [2024-11-20 17:44:32,648 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 48 selfloop transitions, 2 changer transitions 0/60 dead transitions. [2024-11-20 17:44:32,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 60 transitions, 324 flow [2024-11-20 17:44:32,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:44:32,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:44:32,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-11-20 17:44:32,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4075342465753425 [2024-11-20 17:44:32,649 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 232 flow. Second operand 4 states and 119 transitions. [2024-11-20 17:44:32,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 60 transitions, 324 flow [2024-11-20 17:44:32,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 60 transitions, 318 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:32,652 INFO L231 Difference]: Finished difference. Result has 73 places, 60 transitions, 222 flow [2024-11-20 17:44:32,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=222, PETRI_PLACES=73, PETRI_TRANSITIONS=60} [2024-11-20 17:44:32,652 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-20 17:44:32,653 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 60 transitions, 222 flow [2024-11-20 17:44:32,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.6) internal successors, (123), 5 states have internal predecessors, (123), 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) [2024-11-20 17:44:32,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:32,653 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:32,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-20 17:44:32,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 17:44:32,854 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:32,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash 2002134125, now seen corresponding path program 1 times [2024-11-20 17:44:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:32,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882925339] [2024-11-20 17:44:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:32,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:32,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:32,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:32,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882925339] [2024-11-20 17:44:32,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882925339] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:32,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:32,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:44:32,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690445576] [2024-11-20 17:44:32,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:32,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:44:32,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:32,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:44:32,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:44:32,996 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 73 [2024-11-20 17:44:32,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 60 transitions, 222 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:32,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:32,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 73 [2024-11-20 17:44:32,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:33,144 INFO L124 PetriNetUnfolderBase]: 597/1142 cut-off events. [2024-11-20 17:44:33,145 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2024-11-20 17:44:33,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2522 conditions, 1142 events. 597/1142 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5995 event pairs, 451 based on Foata normal form. 62/1116 useless extension candidates. Maximal degree in co-relation 2475. Up to 908 conditions per place. [2024-11-20 17:44:33,150 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 46 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-11-20 17:44:33,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 58 transitions, 312 flow [2024-11-20 17:44:33,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:44:33,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:44:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-20 17:44:33,151 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3595890410958904 [2024-11-20 17:44:33,151 INFO L175 Difference]: Start difference. First operand has 73 places, 60 transitions, 222 flow. Second operand 4 states and 105 transitions. [2024-11-20 17:44:33,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 58 transitions, 312 flow [2024-11-20 17:44:33,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 58 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:33,153 INFO L231 Difference]: Finished difference. Result has 72 places, 58 transitions, 217 flow [2024-11-20 17:44:33,153 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=213, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=72, PETRI_TRANSITIONS=58} [2024-11-20 17:44:33,154 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 1 predicate places. [2024-11-20 17:44:33,154 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 58 transitions, 217 flow [2024-11-20 17:44:33,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:44:33,154 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:33,155 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:33,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-20 17:44:33,155 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:33,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:33,155 INFO L85 PathProgramCache]: Analyzing trace with hash 355496843, now seen corresponding path program 1 times [2024-11-20 17:44:33,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:33,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352302842] [2024-11-20 17:44:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:33,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:33,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:44:33,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:33,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352302842] [2024-11-20 17:44:33,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352302842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:33,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:33,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:44:33,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774386510] [2024-11-20 17:44:33,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:33,207 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:44:33,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:33,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:44:33,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:44:33,207 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-20 17:44:33,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 58 transitions, 217 flow. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 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) [2024-11-20 17:44:33,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:33,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-20 17:44:33,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:33,377 INFO L124 PetriNetUnfolderBase]: 780/1410 cut-off events. [2024-11-20 17:44:33,377 INFO L125 PetriNetUnfolderBase]: For 379/379 co-relation queries the response was YES. [2024-11-20 17:44:33,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3187 conditions, 1410 events. 780/1410 cut-off events. For 379/379 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7569 event pairs, 385 based on Foata normal form. 1/1334 useless extension candidates. Maximal degree in co-relation 3139. Up to 763 conditions per place. [2024-11-20 17:44:33,381 INFO L140 encePairwiseOnDemand]: 70/73 looper letters, 54 selfloop transitions, 2 changer transitions 6/72 dead transitions. [2024-11-20 17:44:33,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 72 transitions, 382 flow [2024-11-20 17:44:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:44:33,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:44:33,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-20 17:44:33,382 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5114155251141552 [2024-11-20 17:44:33,382 INFO L175 Difference]: Start difference. First operand has 72 places, 58 transitions, 217 flow. Second operand 3 states and 112 transitions. [2024-11-20 17:44:33,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 72 transitions, 382 flow [2024-11-20 17:44:33,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 72 transitions, 379 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:33,384 INFO L231 Difference]: Finished difference. Result has 73 places, 58 transitions, 222 flow [2024-11-20 17:44:33,384 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=73, PETRI_TRANSITIONS=58} [2024-11-20 17:44:33,385 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 2 predicate places. [2024-11-20 17:44:33,385 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 58 transitions, 222 flow [2024-11-20 17:44:33,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 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) [2024-11-20 17:44:33,385 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:33,385 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:33,386 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 17:44:33,386 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:33,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:33,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1299118255, now seen corresponding path program 1 times [2024-11-20 17:44:33,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:33,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681927796] [2024-11-20 17:44:33,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:33,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:33,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:33,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:33,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:33,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681927796] [2024-11-20 17:44:33,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681927796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:33,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251847681] [2024-11-20 17:44:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:33,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:33,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:33,609 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) [2024-11-20 17:44:33,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:44:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:33,734 INFO L255 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-20 17:44:33,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:33,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:33,892 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 4 [2024-11-20 17:44:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:34,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251847681] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:34,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:34,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-20 17:44:34,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414356125] [2024-11-20 17:44:34,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:34,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:44:34,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:44:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:44:34,139 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-20 17:44:34,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 58 transitions, 222 flow. Second operand has 18 states, 18 states have (on average 24.72222222222222) internal successors, (445), 18 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) [2024-11-20 17:44:34,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:34,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-20 17:44:34,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:34,568 INFO L124 PetriNetUnfolderBase]: 772/1369 cut-off events. [2024-11-20 17:44:34,568 INFO L125 PetriNetUnfolderBase]: For 368/368 co-relation queries the response was YES. [2024-11-20 17:44:34,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3255 conditions, 1369 events. 772/1369 cut-off events. For 368/368 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 7039 event pairs, 380 based on Foata normal form. 36/1330 useless extension candidates. Maximal degree in co-relation 2000. Up to 649 conditions per place. [2024-11-20 17:44:34,574 INFO L140 encePairwiseOnDemand]: 60/73 looper letters, 40 selfloop transitions, 14 changer transitions 46/110 dead transitions. [2024-11-20 17:44:34,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 110 transitions, 583 flow [2024-11-20 17:44:34,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 17:44:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 17:44:34,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 311 transitions. [2024-11-20 17:44:34,576 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38729763387297633 [2024-11-20 17:44:34,576 INFO L175 Difference]: Start difference. First operand has 73 places, 58 transitions, 222 flow. Second operand 11 states and 311 transitions. [2024-11-20 17:44:34,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 110 transitions, 583 flow [2024-11-20 17:44:34,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 110 transitions, 578 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 17:44:34,578 INFO L231 Difference]: Finished difference. Result has 85 places, 57 transitions, 249 flow [2024-11-20 17:44:34,579 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=249, PETRI_PLACES=85, PETRI_TRANSITIONS=57} [2024-11-20 17:44:34,579 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 14 predicate places. [2024-11-20 17:44:34,579 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 57 transitions, 249 flow [2024-11-20 17:44:34,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 24.72222222222222) internal successors, (445), 18 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) [2024-11-20 17:44:34,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:34,581 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:34,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-20 17:44:34,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:34,782 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:34,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:34,782 INFO L85 PathProgramCache]: Analyzing trace with hash 358105602, now seen corresponding path program 2 times [2024-11-20 17:44:34,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:34,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974299134] [2024-11-20 17:44:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:34,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:35,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:35,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974299134] [2024-11-20 17:44:35,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974299134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:35,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332735092] [2024-11-20 17:44:35,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:44:35,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:35,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:35,335 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) [2024-11-20 17:44:35,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:44:35,458 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:44:35,458 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:44:35,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:44:35,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:35,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-20 17:44:35,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-20 17:44:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:44:35,552 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:35,600 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-20 17:44:35,600 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 24 treesize of output 11 [2024-11-20 17:44:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 17:44:35,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332735092] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:35,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:44:35,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 16 [2024-11-20 17:44:35,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853729783] [2024-11-20 17:44:35,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:35,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:44:35,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:35,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:44:35,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:44:35,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-20 17:44:35,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 57 transitions, 249 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 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) [2024-11-20 17:44:35,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:35,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-20 17:44:35,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:35,833 INFO L124 PetriNetUnfolderBase]: 907/1462 cut-off events. [2024-11-20 17:44:35,834 INFO L125 PetriNetUnfolderBase]: For 680/692 co-relation queries the response was YES. [2024-11-20 17:44:35,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3628 conditions, 1462 events. 907/1462 cut-off events. For 680/692 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7151 event pairs, 160 based on Foata normal form. 0/1382 useless extension candidates. Maximal degree in co-relation 3576. Up to 793 conditions per place. [2024-11-20 17:44:35,839 INFO L140 encePairwiseOnDemand]: 68/73 looper letters, 73 selfloop transitions, 5 changer transitions 1/87 dead transitions. [2024-11-20 17:44:35,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 87 transitions, 496 flow [2024-11-20 17:44:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:44:35,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:44:35,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-11-20 17:44:35,840 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4328767123287671 [2024-11-20 17:44:35,841 INFO L175 Difference]: Start difference. First operand has 85 places, 57 transitions, 249 flow. Second operand 5 states and 158 transitions. [2024-11-20 17:44:35,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 87 transitions, 496 flow [2024-11-20 17:44:35,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 87 transitions, 462 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-11-20 17:44:35,843 INFO L231 Difference]: Finished difference. Result has 78 places, 59 transitions, 247 flow [2024-11-20 17:44:35,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=247, PETRI_PLACES=78, PETRI_TRANSITIONS=59} [2024-11-20 17:44:35,843 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 7 predicate places. [2024-11-20 17:44:35,843 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 59 transitions, 247 flow [2024-11-20 17:44:35,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 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) [2024-11-20 17:44:35,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:35,844 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:35,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 17:44:36,044 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,SelfDestructingSolverStorable21 [2024-11-20 17:44:36,045 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:36,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:36,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1766571899, now seen corresponding path program 1 times [2024-11-20 17:44:36,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:36,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50648532] [2024-11-20 17:44:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:36,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:44:36,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:36,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50648532] [2024-11-20 17:44:36,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50648532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:36,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760495130] [2024-11-20 17:44:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:36,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:36,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:36,321 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) [2024-11-20 17:44:36,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:44:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:36,446 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-20 17:44:36,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:36,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:44:36,586 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:44:36,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760495130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:36,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:36,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-11-20 17:44:36,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815657555] [2024-11-20 17:44:36,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:36,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 17:44:36,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:36,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 17:44:36,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:44:36,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-20 17:44:36,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 59 transitions, 247 flow. Second operand has 16 states, 16 states have (on average 25.8125) internal successors, (413), 16 states have internal predecessors, (413), 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) [2024-11-20 17:44:36,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:36,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-20 17:44:36,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:37,264 INFO L124 PetriNetUnfolderBase]: 928/1628 cut-off events. [2024-11-20 17:44:37,265 INFO L125 PetriNetUnfolderBase]: For 1584/1686 co-relation queries the response was YES. [2024-11-20 17:44:37,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4304 conditions, 1628 events. 928/1628 cut-off events. For 1584/1686 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8737 event pairs, 487 based on Foata normal form. 59/1629 useless extension candidates. Maximal degree in co-relation 4256. Up to 793 conditions per place. [2024-11-20 17:44:37,270 INFO L140 encePairwiseOnDemand]: 61/73 looper letters, 37 selfloop transitions, 17 changer transitions 40/105 dead transitions. [2024-11-20 17:44:37,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 105 transitions, 603 flow [2024-11-20 17:44:37,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 17:44:37,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 17:44:37,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 305 transitions. [2024-11-20 17:44:37,271 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37982565379825656 [2024-11-20 17:44:37,271 INFO L175 Difference]: Start difference. First operand has 78 places, 59 transitions, 247 flow. Second operand 11 states and 305 transitions. [2024-11-20 17:44:37,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 105 transitions, 603 flow [2024-11-20 17:44:37,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 105 transitions, 596 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-20 17:44:37,274 INFO L231 Difference]: Finished difference. Result has 92 places, 61 transitions, 317 flow [2024-11-20 17:44:37,275 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=317, PETRI_PLACES=92, PETRI_TRANSITIONS=61} [2024-11-20 17:44:37,275 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 21 predicate places. [2024-11-20 17:44:37,275 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 61 transitions, 317 flow [2024-11-20 17:44:37,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 25.8125) internal successors, (413), 16 states have internal predecessors, (413), 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) [2024-11-20 17:44:37,276 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:37,276 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:37,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 17:44:37,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:37,481 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:37,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:37,481 INFO L85 PathProgramCache]: Analyzing trace with hash 322013520, now seen corresponding path program 2 times [2024-11-20 17:44:37,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:37,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672919459] [2024-11-20 17:44:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:37,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:44:37,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:37,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672919459] [2024-11-20 17:44:37,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672919459] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:37,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:37,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:44:37,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727625081] [2024-11-20 17:44:37,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:37,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:44:37,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:37,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:44:37,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:44:37,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 73 [2024-11-20 17:44:37,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 61 transitions, 317 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2024-11-20 17:44:37,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:37,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 73 [2024-11-20 17:44:37,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:37,864 INFO L124 PetriNetUnfolderBase]: 1153/2082 cut-off events. [2024-11-20 17:44:37,864 INFO L125 PetriNetUnfolderBase]: For 2840/3002 co-relation queries the response was YES. [2024-11-20 17:44:37,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5723 conditions, 2082 events. 1153/2082 cut-off events. For 2840/3002 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12898 event pairs, 335 based on Foata normal form. 57/2110 useless extension candidates. Maximal degree in co-relation 5658. Up to 608 conditions per place. [2024-11-20 17:44:37,872 INFO L140 encePairwiseOnDemand]: 69/73 looper letters, 81 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2024-11-20 17:44:37,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 100 transitions, 627 flow [2024-11-20 17:44:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:44:37,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:44:37,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-11-20 17:44:37,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5308219178082192 [2024-11-20 17:44:37,873 INFO L175 Difference]: Start difference. First operand has 92 places, 61 transitions, 317 flow. Second operand 4 states and 155 transitions. [2024-11-20 17:44:37,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 100 transitions, 627 flow [2024-11-20 17:44:37,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 100 transitions, 601 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-20 17:44:37,879 INFO L231 Difference]: Finished difference. Result has 86 places, 66 transitions, 364 flow [2024-11-20 17:44:37,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=86, PETRI_TRANSITIONS=66} [2024-11-20 17:44:37,879 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 15 predicate places. [2024-11-20 17:44:37,879 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 66 transitions, 364 flow [2024-11-20 17:44:37,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 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) [2024-11-20 17:44:37,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:37,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:37,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-20 17:44:37,880 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:37,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:37,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1264049954, now seen corresponding path program 3 times [2024-11-20 17:44:37,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:37,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956721486] [2024-11-20 17:44:37,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:37,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:37,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:39,107 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:44:39,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956721486] [2024-11-20 17:44:39,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956721486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:39,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551753159] [2024-11-20 17:44:39,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:44:39,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:39,111 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) [2024-11-20 17:44:39,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:44:39,257 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-20 17:44:39,258 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:44:39,260 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-20 17:44:39,266 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:39,787 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:44:39,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-20 17:44:39,797 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-20 17:44:39,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 17:44:39,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:44:39,923 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 34 treesize of output 30 [2024-11-20 17:44:39,982 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:44:39,982 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:40,473 INFO L349 Elim1Store]: treesize reduction 4, result has 95.7 percent of original size [2024-11-20 17:44:40,473 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 45 treesize of output 101 [2024-11-20 17:44:40,504 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:44:40,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-20 17:44:40,526 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-20 17:44:40,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2024-11-20 17:44:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:44:40,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551753159] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:40,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:44:40,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [16, 11] total 33 [2024-11-20 17:44:40,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119161496] [2024-11-20 17:44:40,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:40,914 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 17:44:40,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:40,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 17:44:40,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2024-11-20 17:44:41,086 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 73 [2024-11-20 17:44:41,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 66 transitions, 364 flow. Second operand has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 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) [2024-11-20 17:44:41,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:41,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 73 [2024-11-20 17:44:41,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:41,636 INFO L124 PetriNetUnfolderBase]: 2829/4693 cut-off events. [2024-11-20 17:44:41,637 INFO L125 PetriNetUnfolderBase]: For 9556/9764 co-relation queries the response was YES. [2024-11-20 17:44:41,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12870 conditions, 4693 events. 2829/4693 cut-off events. For 9556/9764 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 29122 event pairs, 359 based on Foata normal form. 104/4488 useless extension candidates. Maximal degree in co-relation 12807. Up to 2059 conditions per place. [2024-11-20 17:44:41,661 INFO L140 encePairwiseOnDemand]: 64/73 looper letters, 102 selfloop transitions, 10 changer transitions 2/123 dead transitions. [2024-11-20 17:44:41,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 123 transitions, 813 flow [2024-11-20 17:44:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:44:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:44:41,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 232 transitions. [2024-11-20 17:44:41,662 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3972602739726027 [2024-11-20 17:44:41,662 INFO L175 Difference]: Start difference. First operand has 86 places, 66 transitions, 364 flow. Second operand 8 states and 232 transitions. [2024-11-20 17:44:41,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 123 transitions, 813 flow [2024-11-20 17:44:41,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 123 transitions, 797 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-11-20 17:44:41,669 INFO L231 Difference]: Finished difference. Result has 96 places, 69 transitions, 404 flow [2024-11-20 17:44:41,669 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=73, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=404, PETRI_PLACES=96, PETRI_TRANSITIONS=69} [2024-11-20 17:44:41,670 INFO L277 CegarLoopForPetriNet]: 71 programPoint places, 25 predicate places. [2024-11-20 17:44:41,670 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 69 transitions, 404 flow [2024-11-20 17:44:41,670 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.75) internal successors, (182), 8 states have internal predecessors, (182), 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) [2024-11-20 17:44:41,671 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:41,671 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:41,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-20 17:44:41,871 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,SelfDestructingSolverStorable24 [2024-11-20 17:44:41,871 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2024-11-20 17:44:41,871 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:41,872 INFO L85 PathProgramCache]: Analyzing trace with hash 160456804, now seen corresponding path program 4 times [2024-11-20 17:44:41,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:41,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430668021] [2024-11-20 17:44:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:41,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:43,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:44:43,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:43,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430668021] [2024-11-20 17:44:43,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430668021] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:43,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188866033] [2024-11-20 17:44:43,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 17:44:43,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:43,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:43,058 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) [2024-11-20 17:44:43,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 17:44:43,238 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 17:44:43,238 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:44:43,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:44:43,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:44,113 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 17:44:44,133 INFO L349 Elim1Store]: treesize reduction 3, result has 92.9 percent of original size [2024-11-20 17:44:44,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 53 [2024-11-20 17:44:44,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:44:44,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 22 [2024-11-20 17:44:44,157 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-20 17:44:44,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2024-11-20 17:44:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 17:44:44,234 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:44,880 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 17:44:44,972 INFO L349 Elim1Store]: treesize reduction 4, result has 97.0 percent of original size [2024-11-20 17:44:44,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 58 treesize of output 145 [2024-11-20 17:44:44,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:44:44,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2024-11-20 17:44:45,006 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-20 17:44:45,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2024-11-20 17:44:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-20 17:44:45,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188866033] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:45,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:45,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 33 [2024-11-20 17:44:45,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306127061] [2024-11-20 17:44:45,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:45,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-20 17:44:45,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:45,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-20 17:44:45,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2024-11-20 17:44:47,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 73 [2024-11-20 17:44:47,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 69 transitions, 404 flow. Second operand has 34 states, 34 states have (on average 19.058823529411764) internal successors, (648), 34 states have internal predecessors, (648), 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) [2024-11-20 17:44:47,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:47,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 73 [2024-11-20 17:44:47,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:02,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]