./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-send-receive.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 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:51:34,001 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:51:34,047 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:51:34,050 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:51:34,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:51:34,073 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:51:34,073 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:51:34,074 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:51:34,074 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:51:34,077 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:51:34,077 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:51:34,077 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:51:34,078 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:51:34,078 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:51:34,078 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:51:34,079 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:51:34,079 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:51:34,080 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:51:34,080 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:51:34,080 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:51:34,080 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:51:34,081 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:51:34,081 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:51:34,082 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:51:34,082 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:51:34,082 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:51:34,082 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:51:34,082 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:51:34,083 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:51:34,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:51:34,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:51:34,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:51:34,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:51:34,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:51:34,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:51:34,084 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:51:34,085 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:51:34,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:51:34,085 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:51:34,085 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:51:34,085 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:51:34,086 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:51:34,086 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2024-11-22 21:51:34,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:51:34,315 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:51:34,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:51:34,319 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:51:34,319 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:51:34,320 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-22 21:51:35,526 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:51:35,698 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:51:35,699 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2024-11-22 21:51:35,706 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3ff0aec8/1c1622ebc63048b7a7d03f4d1357d253/FLAG0ecb1cf8b [2024-11-22 21:51:36,100 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3ff0aec8/1c1622ebc63048b7a7d03f4d1357d253 [2024-11-22 21:51:36,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:51:36,104 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:51:36,104 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:51:36,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:51:36,114 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:51:36,116 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,117 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4815d98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36, skipping insertion in model container [2024-11-22 21:51:36,117 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,134 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:51:36,296 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:51:36,299 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:51:36,309 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:51:36,336 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:51:36,354 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:51:36,355 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36 WrapperNode [2024-11-22 21:51:36,355 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:51:36,356 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:51:36,357 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:51:36,357 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:51:36,362 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,369 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,390 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 150 [2024-11-22 21:51:36,391 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:51:36,391 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:51:36,391 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:51:36,392 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:51:36,400 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,400 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,404 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,415 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-22 21:51:36,415 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,416 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,424 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,426 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,429 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,432 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:51:36,432 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:51:36,432 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:51:36,433 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:51:36,433 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (1/1) ... [2024-11-22 21:51:36,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:51:36,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:36,469 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:51:36,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:51:36,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:51:36,507 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:51:36,507 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:51:36,508 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:51:36,508 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:51:36,509 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:51:36,509 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:51:36,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:51:36,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:51:36,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:51:36,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:51:36,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 21:51:36,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 21:51:36,511 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:51:36,511 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:51:36,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:51:36,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:51:36,511 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:51:36,513 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:51:36,624 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:51:36,625 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:51:36,887 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:51:36,888 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:51:37,061 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:51:37,065 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 21:51:37,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:51:37 BoogieIcfgContainer [2024-11-22 21:51:37,066 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:51:37,067 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:51:37,070 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:51:37,073 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:51:37,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:51:36" (1/3) ... [2024-11-22 21:51:37,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469065bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:51:37, skipping insertion in model container [2024-11-22 21:51:37,074 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:51:36" (2/3) ... [2024-11-22 21:51:37,074 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@469065bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:51:37, skipping insertion in model container [2024-11-22 21:51:37,075 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:51:37" (3/3) ... [2024-11-22 21:51:37,076 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2024-11-22 21:51:37,089 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:51:37,089 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-22 21:51:37,089 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:51:37,151 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:51:37,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 48 transitions, 117 flow [2024-11-22 21:51:37,211 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2024-11-22 21:51:37,211 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:51:37,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 4/45 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 100 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-22 21:51:37,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 48 transitions, 117 flow [2024-11-22 21:51:37,219 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 44 transitions, 106 flow [2024-11-22 21:51:37,231 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:51:37,236 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;@15059916, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:51:37,236 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-22 21:51:37,241 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:51:37,242 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:51:37,242 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:51:37,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:37,243 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:51:37,243 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:37,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash 453619, now seen corresponding path program 1 times [2024-11-22 21:51:37,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:37,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391316081] [2024-11-22 21:51:37,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:37,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:37,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:37,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:37,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391316081] [2024-11-22 21:51:37,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391316081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:37,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:37,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:51:37,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767094513] [2024-11-22 21:51:37,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:37,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:37,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:37,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:37,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:37,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-22 21:51:37,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:37,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:37,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-22 21:51:37,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:37,749 INFO L124 PetriNetUnfolderBase]: 535/975 cut-off events. [2024-11-22 21:51:37,750 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2024-11-22 21:51:37,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1931 conditions, 975 events. 535/975 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6794 event pairs, 491 based on Foata normal form. 1/630 useless extension candidates. Maximal degree in co-relation 1792. Up to 826 conditions per place. [2024-11-22 21:51:37,767 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 25 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-11-22 21:51:37,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 154 flow [2024-11-22 21:51:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:37,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:37,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-11-22 21:51:37,777 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5763888888888888 [2024-11-22 21:51:37,778 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 106 flow. Second operand 3 states and 83 transitions. [2024-11-22 21:51:37,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 154 flow [2024-11-22 21:51:37,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 142 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:51:37,784 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 92 flow [2024-11-22 21:51:37,785 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-11-22 21:51:37,787 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2024-11-22 21:51:37,787 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 92 flow [2024-11-22 21:51:37,787 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:37,788 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:37,788 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:51:37,788 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:51:37,788 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:37,788 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:37,788 INFO L85 PathProgramCache]: Analyzing trace with hash 453620, now seen corresponding path program 1 times [2024-11-22 21:51:37,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:37,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766610929] [2024-11-22 21:51:37,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:37,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:38,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:38,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766610929] [2024-11-22 21:51:38,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766610929] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:38,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:38,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:38,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4247170] [2024-11-22 21:51:38,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:38,033 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:38,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:38,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:38,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:38,043 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-22 21:51:38,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:38,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:38,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-22 21:51:38,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:38,184 INFO L124 PetriNetUnfolderBase]: 536/978 cut-off events. [2024-11-22 21:51:38,184 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:51:38,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1867 conditions, 978 events. 536/978 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6810 event pairs, 491 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 1845. Up to 831 conditions per place. [2024-11-22 21:51:38,191 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 27 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-11-22 21:51:38,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 162 flow [2024-11-22 21:51:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:38,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-22 21:51:38,194 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-22 21:51:38,194 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 92 flow. Second operand 4 states and 104 transitions. [2024-11-22 21:51:38,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 162 flow [2024-11-22 21:51:38,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:38,197 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 115 flow [2024-11-22 21:51:38,197 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-11-22 21:51:38,198 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-11-22 21:51:38,198 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 115 flow [2024-11-22 21:51:38,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:38,198 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:38,199 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:51:38,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:51:38,199 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:38,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:38,199 INFO L85 PathProgramCache]: Analyzing trace with hash 435942302, now seen corresponding path program 1 times [2024-11-22 21:51:38,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:38,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644359764] [2024-11-22 21:51:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:38,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:38,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:38,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644359764] [2024-11-22 21:51:38,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644359764] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:38,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213090137] [2024-11-22 21:51:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:38,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:38,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:38,441 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:38,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:51:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:38,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:51:38,504 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:38,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:51:38,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:38,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:38,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213090137] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:38,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:38,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:51:38,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046887452] [2024-11-22 21:51:38,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:38,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:51:38,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:38,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:51:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:51:38,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-22 21:51:38,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 115 flow. Second operand has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:38,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:38,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-22 21:51:38,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:39,126 INFO L124 PetriNetUnfolderBase]: 536/977 cut-off events. [2024-11-22 21:51:39,126 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:51:39,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1874 conditions, 977 events. 536/977 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 6788 event pairs, 491 based on Foata normal form. 0/631 useless extension candidates. Maximal degree in co-relation 1852. Up to 827 conditions per place. [2024-11-22 21:51:39,131 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 23 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-11-22 21:51:39,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 171 flow [2024-11-22 21:51:39,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:51:39,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:51:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-11-22 21:51:39,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4826388888888889 [2024-11-22 21:51:39,133 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 115 flow. Second operand 6 states and 139 transitions. [2024-11-22 21:51:39,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 171 flow [2024-11-22 21:51:39,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:39,134 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 122 flow [2024-11-22 21:51:39,134 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2024-11-22 21:51:39,135 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2024-11-22 21:51:39,135 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 122 flow [2024-11-22 21:51:39,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:39,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:39,135 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:39,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-22 21:51:39,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:39,343 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:39,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:39,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1911380750, now seen corresponding path program 1 times [2024-11-22 21:51:39,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:39,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084786009] [2024-11-22 21:51:39,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:39,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:39,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:39,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084786009] [2024-11-22 21:51:39,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084786009] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:39,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:39,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:51:39,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713476564] [2024-11-22 21:51:39,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:39,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:39,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:39,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:39,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:39,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-22 21:51:39,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:39,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:39,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-22 21:51:39,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:39,506 INFO L124 PetriNetUnfolderBase]: 788/1330 cut-off events. [2024-11-22 21:51:39,506 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-22 21:51:39,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2543 conditions, 1330 events. 788/1330 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7083 event pairs, 266 based on Foata normal form. 48/938 useless extension candidates. Maximal degree in co-relation 2517. Up to 856 conditions per place. [2024-11-22 21:51:39,514 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 43 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-11-22 21:51:39,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 59 transitions, 250 flow [2024-11-22 21:51:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-11-22 21:51:39,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7152777777777778 [2024-11-22 21:51:39,517 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 122 flow. Second operand 3 states and 103 transitions. [2024-11-22 21:51:39,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 59 transitions, 250 flow [2024-11-22 21:51:39,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 59 transitions, 220 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-22 21:51:39,519 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 115 flow [2024-11-22 21:51:39,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2024-11-22 21:51:39,519 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2024-11-22 21:51:39,519 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 115 flow [2024-11-22 21:51:39,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:39,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:39,520 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:39,520 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:51:39,520 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:39,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:39,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1971454629, now seen corresponding path program 1 times [2024-11-22 21:51:39,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:39,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044493113] [2024-11-22 21:51:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:39,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:39,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:39,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:39,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044493113] [2024-11-22 21:51:39,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044493113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:39,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:39,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:51:39,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981579585] [2024-11-22 21:51:39,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:39,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:39,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:39,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:39,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:39,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 48 [2024-11-22 21:51:39,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:39,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:39,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 48 [2024-11-22 21:51:39,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:39,680 INFO L124 PetriNetUnfolderBase]: 488/856 cut-off events. [2024-11-22 21:51:39,681 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-22 21:51:39,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1841 conditions, 856 events. 488/856 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4376 event pairs, 330 based on Foata normal form. 0/701 useless extension candidates. Maximal degree in co-relation 842. Up to 712 conditions per place. [2024-11-22 21:51:39,688 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 26 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2024-11-22 21:51:39,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 165 flow [2024-11-22 21:51:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:39,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:39,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-11-22 21:51:39,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-11-22 21:51:39,690 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 115 flow. Second operand 4 states and 99 transitions. [2024-11-22 21:51:39,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 165 flow [2024-11-22 21:51:39,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 162 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:39,692 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 110 flow [2024-11-22 21:51:39,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2024-11-22 21:51:39,692 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2024-11-22 21:51:39,693 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 110 flow [2024-11-22 21:51:39,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:39,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:39,693 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:39,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:51:39,696 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:39,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:39,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1971454630, now seen corresponding path program 1 times [2024-11-22 21:51:39,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:39,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730574798] [2024-11-22 21:51:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:39,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:39,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:39,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:39,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730574798] [2024-11-22 21:51:39,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730574798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:39,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:39,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:39,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515604191] [2024-11-22 21:51:39,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:39,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:39,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:39,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:39,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:39,745 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-22 21:51:39,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 110 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) [2024-11-22 21:51:39,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:39,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-22 21:51:39,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:39,844 INFO L124 PetriNetUnfolderBase]: 540/979 cut-off events. [2024-11-22 21:51:39,845 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-22 21:51:39,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2050 conditions, 979 events. 540/979 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 5249 event pairs, 383 based on Foata normal form. 0/819 useless extension candidates. Maximal degree in co-relation 1794. Up to 715 conditions per place. [2024-11-22 21:51:39,850 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 39 selfloop transitions, 3 changer transitions 0/55 dead transitions. [2024-11-22 21:51:39,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 226 flow [2024-11-22 21:51:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-22 21:51:39,851 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-11-22 21:51:39,851 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 110 flow. Second operand 4 states and 117 transitions. [2024-11-22 21:51:39,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 226 flow [2024-11-22 21:51:39,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 55 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:39,853 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 115 flow [2024-11-22 21:51:39,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2024-11-22 21:51:39,857 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2024-11-22 21:51:39,857 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 115 flow [2024-11-22 21:51:39,858 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) [2024-11-22 21:51:39,858 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:39,858 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:39,858 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:51:39,858 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:39,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:39,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1370417084, now seen corresponding path program 1 times [2024-11-22 21:51:39,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:39,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298754879] [2024-11-22 21:51:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:39,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:51:39,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:39,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298754879] [2024-11-22 21:51:39,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298754879] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:39,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:39,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:39,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077009085] [2024-11-22 21:51:39,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:39,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:51:39,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:39,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:51:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:51:39,895 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 48 [2024-11-22 21:51:39,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:39,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:39,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 48 [2024-11-22 21:51:39,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:40,011 INFO L124 PetriNetUnfolderBase]: 694/1162 cut-off events. [2024-11-22 21:51:40,011 INFO L125 PetriNetUnfolderBase]: For 185/185 co-relation queries the response was YES. [2024-11-22 21:51:40,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2562 conditions, 1162 events. 694/1162 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6219 event pairs, 219 based on Foata normal form. 14/1013 useless extension candidates. Maximal degree in co-relation 2313. Up to 743 conditions per place. [2024-11-22 21:51:40,016 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 42 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-22 21:51:40,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 237 flow [2024-11-22 21:51:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:51:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:51:40,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-11-22 21:51:40,018 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-22 21:51:40,018 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 115 flow. Second operand 3 states and 93 transitions. [2024-11-22 21:51:40,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 237 flow [2024-11-22 21:51:40,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:40,019 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 118 flow [2024-11-22 21:51:40,019 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-11-22 21:51:40,020 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2024-11-22 21:51:40,020 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 118 flow [2024-11-22 21:51:40,020 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:40,020 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:40,020 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 21:51:40,020 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:40,020 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:40,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1370417050, now seen corresponding path program 1 times [2024-11-22 21:51:40,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:40,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997390954] [2024-11-22 21:51:40,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:40,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:40,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:40,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997390954] [2024-11-22 21:51:40,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997390954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:40,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:40,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:51:40,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635547971] [2024-11-22 21:51:40,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:40,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:51:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:51:40,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:51:40,188 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-22 21:51:40,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 118 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:40,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-22 21:51:40,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:40,303 INFO L124 PetriNetUnfolderBase]: 327/682 cut-off events. [2024-11-22 21:51:40,303 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2024-11-22 21:51:40,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1444 conditions, 682 events. 327/682 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3677 event pairs, 200 based on Foata normal form. 54/701 useless extension candidates. Maximal degree in co-relation 1172. Up to 419 conditions per place. [2024-11-22 21:51:40,307 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 25 selfloop transitions, 7 changer transitions 0/46 dead transitions. [2024-11-22 21:51:40,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 192 flow [2024-11-22 21:51:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:51:40,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:51:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-11-22 21:51:40,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291666666666667 [2024-11-22 21:51:40,311 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 118 flow. Second operand 5 states and 127 transitions. [2024-11-22 21:51:40,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 192 flow [2024-11-22 21:51:40,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:40,312 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 122 flow [2024-11-22 21:51:40,312 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=122, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2024-11-22 21:51:40,313 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -3 predicate places. [2024-11-22 21:51:40,313 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 122 flow [2024-11-22 21:51:40,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,313 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:40,313 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:40,313 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:51:40,313 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:40,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:40,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1133173084, now seen corresponding path program 1 times [2024-11-22 21:51:40,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:40,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157110038] [2024-11-22 21:51:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:40,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:40,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:40,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:40,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:40,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157110038] [2024-11-22 21:51:40,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157110038] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:40,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:40,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:40,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207485295] [2024-11-22 21:51:40,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:40,382 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:40,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:40,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:40,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:40,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-22 21:51:40,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:40,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-22 21:51:40,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:40,511 INFO L124 PetriNetUnfolderBase]: 497/875 cut-off events. [2024-11-22 21:51:40,511 INFO L125 PetriNetUnfolderBase]: For 460/460 co-relation queries the response was YES. [2024-11-22 21:51:40,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2062 conditions, 875 events. 497/875 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4266 event pairs, 63 based on Foata normal form. 48/913 useless extension candidates. Maximal degree in co-relation 1650. Up to 522 conditions per place. [2024-11-22 21:51:40,516 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 46 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2024-11-22 21:51:40,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 306 flow [2024-11-22 21:51:40,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:40,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:40,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-11-22 21:51:40,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5677083333333334 [2024-11-22 21:51:40,517 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 122 flow. Second operand 4 states and 109 transitions. [2024-11-22 21:51:40,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 306 flow [2024-11-22 21:51:40,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 276 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:51:40,519 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 129 flow [2024-11-22 21:51:40,519 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-11-22 21:51:40,520 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, -2 predicate places. [2024-11-22 21:51:40,520 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 129 flow [2024-11-22 21:51:40,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,520 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:40,520 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:40,521 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 21:51:40,521 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:40,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:40,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1542694010, now seen corresponding path program 2 times [2024-11-22 21:51:40,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:40,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073095374] [2024-11-22 21:51:40,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:40,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:40,532 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:51:40,533 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:40,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:40,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073095374] [2024-11-22 21:51:40,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073095374] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:40,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:40,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:40,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524442109] [2024-11-22 21:51:40,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:40,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:40,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:40,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:40,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:40,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-22 21:51:40,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:40,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-22 21:51:40,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:40,696 INFO L124 PetriNetUnfolderBase]: 489/848 cut-off events. [2024-11-22 21:51:40,696 INFO L125 PetriNetUnfolderBase]: For 302/346 co-relation queries the response was YES. [2024-11-22 21:51:40,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2078 conditions, 848 events. 489/848 cut-off events. For 302/346 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3615 event pairs, 95 based on Foata normal form. 60/907 useless extension candidates. Maximal degree in co-relation 1659. Up to 613 conditions per place. [2024-11-22 21:51:40,700 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 37 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2024-11-22 21:51:40,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 262 flow [2024-11-22 21:51:40,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:40,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-22 21:51:40,701 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5260416666666666 [2024-11-22 21:51:40,701 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 129 flow. Second operand 4 states and 101 transitions. [2024-11-22 21:51:40,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 262 flow [2024-11-22 21:51:40,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 55 transitions, 257 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:40,703 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 159 flow [2024-11-22 21:51:40,703 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-11-22 21:51:40,705 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 2 predicate places. [2024-11-22 21:51:40,705 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 159 flow [2024-11-22 21:51:40,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:40,705 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:40,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:51:40,706 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:40,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:40,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1347901906, now seen corresponding path program 3 times [2024-11-22 21:51:40,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:40,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67830840] [2024-11-22 21:51:40,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:51:40,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:40,715 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-22 21:51:40,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:40,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:40,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67830840] [2024-11-22 21:51:40,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67830840] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:40,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:40,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:40,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952391036] [2024-11-22 21:51:40,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:40,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:40,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:40,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:40,799 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-22 21:51:40,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 159 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:40,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-22 21:51:40,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:40,921 INFO L124 PetriNetUnfolderBase]: 564/1015 cut-off events. [2024-11-22 21:51:40,921 INFO L125 PetriNetUnfolderBase]: For 608/618 co-relation queries the response was YES. [2024-11-22 21:51:40,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2635 conditions, 1015 events. 564/1015 cut-off events. For 608/618 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 5064 event pairs, 142 based on Foata normal form. 62/1070 useless extension candidates. Maximal degree in co-relation 2041. Up to 552 conditions per place. [2024-11-22 21:51:40,926 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 53 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-11-22 21:51:40,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 72 transitions, 373 flow [2024-11-22 21:51:40,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:51:40,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:51:40,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-22 21:51:40,927 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-22 21:51:40,927 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 159 flow. Second operand 5 states and 132 transitions. [2024-11-22 21:51:40,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 72 transitions, 373 flow [2024-11-22 21:51:40,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 72 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:51:40,929 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 177 flow [2024-11-22 21:51:40,929 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2024-11-22 21:51:40,929 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2024-11-22 21:51:40,929 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 177 flow [2024-11-22 21:51:40,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:40,930 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:40,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:51:40,930 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:40,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:40,930 INFO L85 PathProgramCache]: Analyzing trace with hash -31243646, now seen corresponding path program 4 times [2024-11-22 21:51:40,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:40,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31594040] [2024-11-22 21:51:40,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:51:40,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:40,938 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:51:40,938 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:40,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:40,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31594040] [2024-11-22 21:51:40,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31594040] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:40,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:40,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:40,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002917756] [2024-11-22 21:51:40,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:40,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:40,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:40,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:40,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:40,997 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-22 21:51:40,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 177 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:40,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:40,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-22 21:51:40,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:41,131 INFO L124 PetriNetUnfolderBase]: 740/1385 cut-off events. [2024-11-22 21:51:41,132 INFO L125 PetriNetUnfolderBase]: For 1299/1359 co-relation queries the response was YES. [2024-11-22 21:51:41,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3583 conditions, 1385 events. 740/1385 cut-off events. For 1299/1359 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7692 event pairs, 212 based on Foata normal form. 102/1440 useless extension candidates. Maximal degree in co-relation 3042. Up to 667 conditions per place. [2024-11-22 21:51:41,138 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 46 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-11-22 21:51:41,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 353 flow [2024-11-22 21:51:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:51:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:51:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-11-22 21:51:41,140 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-22 21:51:41,140 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 177 flow. Second operand 5 states and 126 transitions. [2024-11-22 21:51:41,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 353 flow [2024-11-22 21:51:41,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 66 transitions, 342 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:51:41,142 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 189 flow [2024-11-22 21:51:41,143 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2024-11-22 21:51:41,143 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 8 predicate places. [2024-11-22 21:51:41,144 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 189 flow [2024-11-22 21:51:41,144 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:41,144 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:41,144 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:41,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-22 21:51:41,144 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:41,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:41,144 INFO L85 PathProgramCache]: Analyzing trace with hash -565307366, now seen corresponding path program 5 times [2024-11-22 21:51:41,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:41,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773176432] [2024-11-22 21:51:41,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:51:41,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:41,154 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:51:41,155 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:41,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:41,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773176432] [2024-11-22 21:51:41,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773176432] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:41,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:41,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:51:41,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477517058] [2024-11-22 21:51:41,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:41,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:51:41,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:41,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:51:41,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:51:41,270 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-22 21:51:41,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:41,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:41,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-22 21:51:41,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:41,441 INFO L124 PetriNetUnfolderBase]: 1003/1803 cut-off events. [2024-11-22 21:51:41,441 INFO L125 PetriNetUnfolderBase]: For 1661/1677 co-relation queries the response was YES. [2024-11-22 21:51:41,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4770 conditions, 1803 events. 1003/1803 cut-off events. For 1661/1677 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10271 event pairs, 210 based on Foata normal form. 117/1870 useless extension candidates. Maximal degree in co-relation 4295. Up to 476 conditions per place. [2024-11-22 21:51:41,449 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 53 selfloop transitions, 5 changer transitions 7/77 dead transitions. [2024-11-22 21:51:41,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 433 flow [2024-11-22 21:51:41,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:51:41,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:51:41,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-11-22 21:51:41,450 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-11-22 21:51:41,450 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 189 flow. Second operand 5 states and 136 transitions. [2024-11-22 21:51:41,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 433 flow [2024-11-22 21:51:41,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 421 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:51:41,452 INFO L231 Difference]: Finished difference. Result has 61 places, 44 transitions, 192 flow [2024-11-22 21:51:41,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=61, PETRI_TRANSITIONS=44} [2024-11-22 21:51:41,453 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 11 predicate places. [2024-11-22 21:51:41,453 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 44 transitions, 192 flow [2024-11-22 21:51:41,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:41,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:41,453 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] [2024-11-22 21:51:41,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-22 21:51:41,454 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:41,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:41,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1702084630, now seen corresponding path program 1 times [2024-11-22 21:51:41,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:41,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88497156] [2024-11-22 21:51:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:41,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:41,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:41,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:41,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88497156] [2024-11-22 21:51:41,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88497156] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:41,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859055495] [2024-11-22 21:51:41,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:41,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:41,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:41,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:41,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:51:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:41,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-22 21:51:41,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:41,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-22 21:51:42,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:42,203 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:42,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-11-22 21:51:42,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:51:42,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-11-22 21:51:42,917 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:42,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859055495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:42,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:42,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 28 [2024-11-22 21:51:42,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058585378] [2024-11-22 21:51:42,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:42,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-22 21:51:42,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:42,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-22 21:51:42,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2024-11-22 21:51:43,039 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 48 [2024-11-22 21:51:43,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 44 transitions, 192 flow. Second operand has 29 states, 29 states have (on average 12.689655172413794) internal successors, (368), 29 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:43,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:43,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 48 [2024-11-22 21:51:43,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:46,562 INFO L124 PetriNetUnfolderBase]: 12007/17737 cut-off events. [2024-11-22 21:51:46,562 INFO L125 PetriNetUnfolderBase]: For 19316/19316 co-relation queries the response was YES. [2024-11-22 21:51:46,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50225 conditions, 17737 events. 12007/17737 cut-off events. For 19316/19316 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 105758 event pairs, 981 based on Foata normal form. 696/18429 useless extension candidates. Maximal degree in co-relation 26003. Up to 3565 conditions per place. [2024-11-22 21:51:46,605 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 351 selfloop transitions, 117 changer transitions 92/564 dead transitions. [2024-11-22 21:51:46,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 564 transitions, 3337 flow [2024-11-22 21:51:46,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-11-22 21:51:46,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-11-22 21:51:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 1097 transitions. [2024-11-22 21:51:46,609 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40095029239766083 [2024-11-22 21:51:46,609 INFO L175 Difference]: Start difference. First operand has 61 places, 44 transitions, 192 flow. Second operand 57 states and 1097 transitions. [2024-11-22 21:51:46,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 564 transitions, 3337 flow [2024-11-22 21:51:46,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 564 transitions, 3234 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-11-22 21:51:46,623 INFO L231 Difference]: Finished difference. Result has 146 places, 166 transitions, 1289 flow [2024-11-22 21:51:46,623 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=1289, PETRI_PLACES=146, PETRI_TRANSITIONS=166} [2024-11-22 21:51:46,624 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 96 predicate places. [2024-11-22 21:51:46,624 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 166 transitions, 1289 flow [2024-11-22 21:51:46,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 12.689655172413794) internal successors, (368), 29 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:46,624 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:46,625 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:51:46,631 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:51:46,828 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,SelfDestructingSolverStorable13 [2024-11-22 21:51:46,830 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:46,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:46,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1271319742, now seen corresponding path program 2 times [2024-11-22 21:51:46,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:46,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849128725] [2024-11-22 21:51:46,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:51:46,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:46,852 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:51:46,852 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:51:46,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:46,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849128725] [2024-11-22 21:51:46,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849128725] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:46,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:46,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:51:46,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817761137] [2024-11-22 21:51:46,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:46,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:46,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:46,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:46,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:46,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 48 [2024-11-22 21:51:46,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 166 transitions, 1289 flow. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:46,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:46,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 48 [2024-11-22 21:51:46,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:47,281 INFO L124 PetriNetUnfolderBase]: 2079/3905 cut-off events. [2024-11-22 21:51:47,281 INFO L125 PetriNetUnfolderBase]: For 54902/55163 co-relation queries the response was YES. [2024-11-22 21:51:47,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20721 conditions, 3905 events. 2079/3905 cut-off events. For 54902/55163 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 24882 event pairs, 475 based on Foata normal form. 283/3909 useless extension candidates. Maximal degree in co-relation 18121. Up to 1551 conditions per place. [2024-11-22 21:51:47,309 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 113 selfloop transitions, 47 changer transitions 0/226 dead transitions. [2024-11-22 21:51:47,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 226 transitions, 2142 flow [2024-11-22 21:51:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:47,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-22 21:51:47,310 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-11-22 21:51:47,310 INFO L175 Difference]: Start difference. First operand has 146 places, 166 transitions, 1289 flow. Second operand 4 states and 123 transitions. [2024-11-22 21:51:47,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 226 transitions, 2142 flow [2024-11-22 21:51:47,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 226 transitions, 1782 flow, removed 112 selfloop flow, removed 15 redundant places. [2024-11-22 21:51:47,362 INFO L231 Difference]: Finished difference. Result has 136 places, 204 transitions, 1551 flow [2024-11-22 21:51:47,362 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1551, PETRI_PLACES=136, PETRI_TRANSITIONS=204} [2024-11-22 21:51:47,363 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 86 predicate places. [2024-11-22 21:51:47,363 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 204 transitions, 1551 flow [2024-11-22 21:51:47,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.25) internal successors, (97), 4 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:47,363 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:47,364 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 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] [2024-11-22 21:51:47,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:51:47,364 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:47,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:47,364 INFO L85 PathProgramCache]: Analyzing trace with hash -688874354, now seen corresponding path program 3 times [2024-11-22 21:51:47,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:47,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79480417] [2024-11-22 21:51:47,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:51:47,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:47,393 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 21:51:47,393 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 21:51:47,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:47,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79480417] [2024-11-22 21:51:47,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79480417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:47,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929550693] [2024-11-22 21:51:47,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:51:47,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:47,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:47,606 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:47,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:51:47,672 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 21:51:47,672 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:47,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:51:47,675 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 21:51:47,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:47,835 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:51:47,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-11-22 21:51:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-22 21:51:47,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929550693] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:47,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:47,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-22 21:51:47,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921037689] [2024-11-22 21:51:47,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:47,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:51:47,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:51:47,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:51:47,964 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-22 21:51:47,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 204 transitions, 1551 flow. Second operand has 15 states, 15 states have (on average 19.933333333333334) internal successors, (299), 15 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:47,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:47,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-22 21:51:47,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:48,904 INFO L124 PetriNetUnfolderBase]: 4674/8379 cut-off events. [2024-11-22 21:51:48,904 INFO L125 PetriNetUnfolderBase]: For 89869/90274 co-relation queries the response was YES. [2024-11-22 21:51:48,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42357 conditions, 8379 events. 4674/8379 cut-off events. For 89869/90274 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 57723 event pairs, 392 based on Foata normal form. 355/8468 useless extension candidates. Maximal degree in co-relation 28304. Up to 1790 conditions per place. [2024-11-22 21:51:48,952 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 218 selfloop transitions, 43 changer transitions 45/358 dead transitions. [2024-11-22 21:51:48,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 358 transitions, 3561 flow [2024-11-22 21:51:48,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:51:48,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:51:48,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-11-22 21:51:48,953 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-11-22 21:51:48,953 INFO L175 Difference]: Start difference. First operand has 136 places, 204 transitions, 1551 flow. Second operand 9 states and 221 transitions. [2024-11-22 21:51:48,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 358 transitions, 3561 flow [2024-11-22 21:51:49,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 358 transitions, 3469 flow, removed 46 selfloop flow, removed 0 redundant places. [2024-11-22 21:51:49,025 INFO L231 Difference]: Finished difference. Result has 149 places, 217 transitions, 1825 flow [2024-11-22 21:51:49,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1519, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1825, PETRI_PLACES=149, PETRI_TRANSITIONS=217} [2024-11-22 21:51:49,026 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 99 predicate places. [2024-11-22 21:51:49,030 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 217 transitions, 1825 flow [2024-11-22 21:51:49,030 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.933333333333334) internal successors, (299), 15 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:49,030 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:49,030 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 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] [2024-11-22 21:51:49,037 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:51:49,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:49,231 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:49,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:49,232 INFO L85 PathProgramCache]: Analyzing trace with hash -360401842, now seen corresponding path program 4 times [2024-11-22 21:51:49,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:49,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389013288] [2024-11-22 21:51:49,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:51:49,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:49,264 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:51:49,264 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:49,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:51:49,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:49,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389013288] [2024-11-22 21:51:49,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389013288] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:51:49,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:51:49,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:51:49,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114623203] [2024-11-22 21:51:49,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:51:49,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:51:49,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:49,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:51:49,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:51:49,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 48 [2024-11-22 21:51:49,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 217 transitions, 1825 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 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) [2024-11-22 21:51:49,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:49,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 48 [2024-11-22 21:51:49,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:51:50,020 INFO L124 PetriNetUnfolderBase]: 4157/7425 cut-off events. [2024-11-22 21:51:50,020 INFO L125 PetriNetUnfolderBase]: For 81867/82447 co-relation queries the response was YES. [2024-11-22 21:51:50,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38510 conditions, 7425 events. 4157/7425 cut-off events. For 81867/82447 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 50232 event pairs, 859 based on Foata normal form. 771/7803 useless extension candidates. Maximal degree in co-relation 34123. Up to 3265 conditions per place. [2024-11-22 21:51:50,069 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 151 selfloop transitions, 6 changer transitions 3/203 dead transitions. [2024-11-22 21:51:50,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 203 transitions, 2170 flow [2024-11-22 21:51:50,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:51:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:51:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-22 21:51:50,071 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-11-22 21:51:50,071 INFO L175 Difference]: Start difference. First operand has 149 places, 217 transitions, 1825 flow. Second operand 4 states and 105 transitions. [2024-11-22 21:51:50,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 203 transitions, 2170 flow [2024-11-22 21:51:50,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 203 transitions, 2066 flow, removed 41 selfloop flow, removed 9 redundant places. [2024-11-22 21:51:50,219 INFO L231 Difference]: Finished difference. Result has 135 places, 167 transitions, 1430 flow [2024-11-22 21:51:50,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1430, PETRI_PLACES=135, PETRI_TRANSITIONS=167} [2024-11-22 21:51:50,219 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 85 predicate places. [2024-11-22 21:51:50,220 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 167 transitions, 1430 flow [2024-11-22 21:51:50,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 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) [2024-11-22 21:51:50,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:50,220 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] [2024-11-22 21:51:50,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:51:50,220 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:51:50,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:50,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1711757530, now seen corresponding path program 1 times [2024-11-22 21:51:50,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:50,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177876705] [2024-11-22 21:51:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:50,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:50,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:50,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:50,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177876705] [2024-11-22 21:51:50,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177876705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:50,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225713856] [2024-11-22 21:51:50,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:51:50,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:50,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:50,928 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:50,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:51:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:51:50,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-22 21:51:50,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:51,544 INFO L349 Elim1Store]: treesize reduction 38, result has 15.6 percent of original size [2024-11-22 21:51:51,544 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 47 treesize of output 20 [2024-11-22 21:51:51,591 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:51,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:51,959 INFO L349 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2024-11-22 21:51:51,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 52 [2024-11-22 21:51:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:51:52,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225713856] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:52,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:52,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 35 [2024-11-22 21:51:52,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754179455] [2024-11-22 21:51:52,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:52,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-22 21:51:52,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:52,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-22 21:51:52,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2024-11-22 21:51:52,793 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2024-11-22 21:51:52,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 167 transitions, 1430 flow. Second operand has 36 states, 36 states have (on average 13.833333333333334) internal successors, (498), 36 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:52,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:52,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2024-11-22 21:51:52,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:15,707 INFO L124 PetriNetUnfolderBase]: 65903/103945 cut-off events. [2024-11-22 21:52:15,708 INFO L125 PetriNetUnfolderBase]: For 642469/642691 co-relation queries the response was YES. [2024-11-22 21:52:16,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468739 conditions, 103945 events. 65903/103945 cut-off events. For 642469/642691 co-relation queries the response was YES. Maximal size of possible extension queue 1738. Compared 804384 event pairs, 3593 based on Foata normal form. 4754/108134 useless extension candidates. Maximal degree in co-relation 363723. Up to 14957 conditions per place. [2024-11-22 21:52:16,661 INFO L140 encePairwiseOnDemand]: 31/48 looper letters, 2040 selfloop transitions, 1094 changer transitions 713/3854 dead transitions. [2024-11-22 21:52:16,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 3854 transitions, 38534 flow [2024-11-22 21:52:16,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2024-11-22 21:52:16,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2024-11-22 21:52:16,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 4380 transitions. [2024-11-22 21:52:16,674 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44730392156862747 [2024-11-22 21:52:16,674 INFO L175 Difference]: Start difference. First operand has 135 places, 167 transitions, 1430 flow. Second operand 204 states and 4380 transitions. [2024-11-22 21:52:16,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 3854 transitions, 38534 flow [2024-11-22 21:52:17,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 3854 transitions, 38528 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:52:17,273 INFO L231 Difference]: Finished difference. Result has 414 places, 1344 transitions, 17367 flow [2024-11-22 21:52:17,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1397, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=204, PETRI_FLOW=17367, PETRI_PLACES=414, PETRI_TRANSITIONS=1344} [2024-11-22 21:52:17,274 INFO L277 CegarLoopForPetriNet]: 50 programPoint places, 364 predicate places. [2024-11-22 21:52:17,274 INFO L471 AbstractCegarLoop]: Abstraction has has 414 places, 1344 transitions, 17367 flow [2024-11-22 21:52:17,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 13.833333333333334) internal successors, (498), 36 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:17,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:17,275 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] [2024-11-22 21:52:17,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:52:17,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 21:52:17,475 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:52:17,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:17,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1377373542, now seen corresponding path program 2 times [2024-11-22 21:52:17,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:17,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274017449] [2024-11-22 21:52:17,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:17,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:17,494 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:52:17,495 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:18,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:18,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274017449] [2024-11-22 21:52:18,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274017449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:18,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972293100] [2024-11-22 21:52:18,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:18,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:18,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:18,476 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:18,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:52:18,601 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:52:18,601 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:18,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-22 21:52:18,604 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:18,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:19,252 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2024-11-22 21:52:19,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 50 [2024-11-22 21:52:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:19,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972293100] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:19,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:19,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2024-11-22 21:52:19,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360871207] [2024-11-22 21:52:19,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:19,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-22 21:52:19,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:19,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-22 21:52:19,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1180, Unknown=0, NotChecked=0, Total=1406 [2024-11-22 21:52:19,702 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2024-11-22 21:52:19,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 1344 transitions, 17367 flow. Second operand has 38 states, 38 states have (on average 15.5) internal successors, (589), 38 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:19,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:19,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2024-11-22 21:52:19,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand