./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-max-array-hom.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 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:51:36,830 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:51:36,895 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:51:36,903 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:51:36,907 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:51:36,940 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:51:36,943 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:51:36,944 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:51:36,944 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:51:36,945 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:51:36,945 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:51:36,946 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:51:36,947 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:51:36,948 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:51:36,948 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:51:36,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:51:36,951 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:51:36,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:51:36,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:51:36,952 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:51:36,952 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:51:36,956 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:51:36,957 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:51:36,957 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:51:36,957 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:51:36,957 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:51:36,958 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:51:36,958 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:51:36,958 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:51:36,959 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:51:36,959 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:51:36,959 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:51:36,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:51:36,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:51:36,961 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:51:36,961 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:51:36,962 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:51:36,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:51:36,962 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:51:36,962 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:51:36,963 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:51:36,963 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:51:36,963 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 [2024-11-19 09:51:37,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:51:37,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:51:37,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:51:37,300 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:51:37,300 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:51:37,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2024-11-19 09:51:38,807 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:51:38,994 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:51:38,994 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2024-11-19 09:51:39,004 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af83658b2/2649b4496d8a4a1ab2e037bc9299f99b/FLAG341ee3ddd [2024-11-19 09:51:39,019 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af83658b2/2649b4496d8a4a1ab2e037bc9299f99b [2024-11-19 09:51:39,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:51:39,023 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:51:39,024 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:51:39,025 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:51:39,030 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:51:39,031 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,032 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c41d82c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39, skipping insertion in model container [2024-11-19 09:51:39,032 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,063 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:51:39,312 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:51:39,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:51:39,371 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:51:39,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:51:39,469 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:51:39,469 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39 WrapperNode [2024-11-19 09:51:39,470 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:51:39,470 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:51:39,471 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:51:39,471 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:51:39,478 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,485 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,505 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2024-11-19 09:51:39,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:51:39,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:51:39,507 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:51:39,507 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:51:39,518 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,518 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,521 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,535 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 09:51:39,536 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,536 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,546 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,550 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,552 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,553 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,556 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:51:39,557 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:51:39,557 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:51:39,557 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:51:39,558 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (1/1) ... [2024-11-19 09:51:39,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:51:39,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:39,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:51:39,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:51:39,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:51:39,662 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:51:39,663 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:51:39,663 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:51:39,663 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:51:39,663 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:51:39,663 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:51:39,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:51:39,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:51:39,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:51:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:51:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:51:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:51:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:51:39,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:51:39,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:51:39,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:51:39,665 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:51:39,666 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:51:39,760 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:51:39,762 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:51:40,066 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:51:40,066 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:51:40,318 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:51:40,318 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:51:40,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:51:40 BoogieIcfgContainer [2024-11-19 09:51:40,320 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:51:40,322 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:51:40,322 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:51:40,326 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:51:40,327 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:51:39" (1/3) ... [2024-11-19 09:51:40,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6390a7ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:51:40, skipping insertion in model container [2024-11-19 09:51:40,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:51:39" (2/3) ... [2024-11-19 09:51:40,328 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6390a7ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:51:40, skipping insertion in model container [2024-11-19 09:51:40,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:51:40" (3/3) ... [2024-11-19 09:51:40,330 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2024-11-19 09:51:40,349 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:51:40,349 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-19 09:51:40,349 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:51:40,417 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:51:40,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 121 flow [2024-11-19 09:51:40,502 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-11-19 09:51:40,502 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:51:40,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 4/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 103 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-19 09:51:40,508 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 121 flow [2024-11-19 09:51:40,514 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 110 flow [2024-11-19 09:51:40,540 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:51:40,547 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;@a82b951, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:51:40,548 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-19 09:51:40,552 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:51:40,555 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:51:40,555 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:51:40,556 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:40,556 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:51:40,559 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:40,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:40,565 INFO L85 PathProgramCache]: Analyzing trace with hash 494854, now seen corresponding path program 1 times [2024-11-19 09:51:40,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:40,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293082323] [2024-11-19 09:51:40,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:40,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:40,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:40,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:40,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293082323] [2024-11-19 09:51:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293082323] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:40,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:40,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:51:40,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548370277] [2024-11-19 09:51:40,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:40,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:51:40,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:40,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:51:40,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:51:40,925 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:40,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:40,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:40,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:40,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:41,342 INFO L124 PetriNetUnfolderBase]: 1316/1930 cut-off events. [2024-11-19 09:51:41,344 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-19 09:51:41,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1930 events. 1316/1930 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9858 event pairs, 1060 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 3637. Up to 1877 conditions per place. [2024-11-19 09:51:41,368 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-19 09:51:41,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-11-19 09:51:41,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:51:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:51:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-19 09:51:41,382 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-11-19 09:51:41,383 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 110 flow. Second operand 3 states and 67 transitions. [2024-11-19 09:51:41,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-11-19 09:51:41,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:51:41,392 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-11-19 09:51:41,394 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-19 09:51:41,398 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -13 predicate places. [2024-11-19 09:51:41,401 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-11-19 09:51:41,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:41,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:41,402 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:51:41,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:51:41,402 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:41,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:41,404 INFO L85 PathProgramCache]: Analyzing trace with hash 494855, now seen corresponding path program 1 times [2024-11-19 09:51:41,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:41,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179917774] [2024-11-19 09:51:41,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:41,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:41,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:41,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179917774] [2024-11-19 09:51:41,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179917774] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:41,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:41,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:41,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990733675] [2024-11-19 09:51:41,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:41,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:41,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:41,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:41,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:41,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:41,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:41,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:41,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:41,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:42,035 INFO L124 PetriNetUnfolderBase]: 1317/1933 cut-off events. [2024-11-19 09:51:42,035 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:42,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 1933 events. 1317/1933 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9817 event pairs, 1060 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 3843. Up to 1882 conditions per place. [2024-11-19 09:51:42,047 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-19 09:51:42,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-11-19 09:51:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:51:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:51:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-19 09:51:42,050 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-11-19 09:51:42,050 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-11-19 09:51:42,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-11-19 09:51:42,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:42,054 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-11-19 09:51:42,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-19 09:51:42,055 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-19 09:51:42,056 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-11-19 09:51:42,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:42,056 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:42,056 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:51:42,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:51:42,056 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:42,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:42,057 INFO L85 PathProgramCache]: Analyzing trace with hash 475570971, now seen corresponding path program 1 times [2024-11-19 09:51:42,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:42,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206435141] [2024-11-19 09:51:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:42,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:42,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:42,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:42,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206435141] [2024-11-19 09:51:42,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206435141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:42,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470814112] [2024-11-19 09:51:42,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:42,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:42,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:42,346 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:42,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:51:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:42,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:51:42,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:42,493 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 [2024-11-19 09:51:42,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:42,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:42,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470814112] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:42,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:42,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:51:42,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517092350] [2024-11-19 09:51:42,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:42,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:51:42,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:42,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:51:42,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:51:42,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:42,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:42,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:42,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:42,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:43,331 INFO L124 PetriNetUnfolderBase]: 1317/1932 cut-off events. [2024-11-19 09:51:43,331 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:43,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1932 events. 1317/1932 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9863 event pairs, 1060 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 3850. Up to 1878 conditions per place. [2024-11-19 09:51:43,345 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-11-19 09:51:43,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2024-11-19 09:51:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:51:43,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:51:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-19 09:51:43,347 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-11-19 09:51:43,347 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2024-11-19 09:51:43,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2024-11-19 09:51:43,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:43,350 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2024-11-19 09:51:43,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, 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=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-19 09:51:43,351 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-19 09:51:43,351 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2024-11-19 09:51:43,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:43,352 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:43,352 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:51:43,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:51:43,556 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:43,557 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:43,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:43,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1859881490, now seen corresponding path program 1 times [2024-11-19 09:51:43,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:43,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465339837] [2024-11-19 09:51:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:43,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:43,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:43,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:43,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:43,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465339837] [2024-11-19 09:51:43,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465339837] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:43,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:43,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:51:43,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594174194] [2024-11-19 09:51:43,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:43,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:51:43,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:43,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:51:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:51:43,634 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:51:43,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:43,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:43,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:51:43,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:43,828 INFO L124 PetriNetUnfolderBase]: 1316/1931 cut-off events. [2024-11-19 09:51:43,828 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:43,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3873 conditions, 1931 events. 1316/1931 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9800 event pairs, 1060 based on Foata normal form. 1/1378 useless extension candidates. Maximal degree in co-relation 3851. Up to 1880 conditions per place. [2024-11-19 09:51:43,840 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-19 09:51:43,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 176 flow [2024-11-19 09:51:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:51:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:51:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-19 09:51:43,842 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-19 09:51:43,842 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 3 states and 65 transitions. [2024-11-19 09:51:43,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 176 flow [2024-11-19 09:51:43,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 150 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-19 09:51:43,844 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 86 flow [2024-11-19 09:51:43,844 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-19 09:51:43,845 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2024-11-19 09:51:43,845 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 86 flow [2024-11-19 09:51:43,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:43,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:43,846 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:43,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:51:43,846 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:43,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:43,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1359754370, now seen corresponding path program 1 times [2024-11-19 09:51:43,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:43,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101240235] [2024-11-19 09:51:43,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:43,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:44,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:44,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101240235] [2024-11-19 09:51:44,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101240235] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:44,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702809395] [2024-11-19 09:51:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:44,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:44,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:44,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:44,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:51:44,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:44,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:51:44,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:44,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:51:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:44,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:44,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702809395] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:44,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:51:44,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-19 09:51:44,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946373159] [2024-11-19 09:51:44,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:44,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:51:44,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:44,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:51:44,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:51:44,268 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:51:44,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:44,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:44,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:51:44,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:44,587 INFO L124 PetriNetUnfolderBase]: 1814/2679 cut-off events. [2024-11-19 09:51:44,587 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:51:44,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5292 conditions, 2679 events. 1814/2679 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 14525 event pairs, 880 based on Foata normal form. 0/1942 useless extension candidates. Maximal degree in co-relation 5281. Up to 1584 conditions per place. [2024-11-19 09:51:44,604 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 47 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-11-19 09:51:44,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 236 flow [2024-11-19 09:51:44,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:51:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:51:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-11-19 09:51:44,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-11-19 09:51:44,608 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 86 flow. Second operand 6 states and 115 transitions. [2024-11-19 09:51:44,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 236 flow [2024-11-19 09:51:44,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:44,610 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 115 flow [2024-11-19 09:51:44,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-19 09:51:44,611 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-19 09:51:44,612 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 115 flow [2024-11-19 09:51:44,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:44,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:44,612 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:44,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:51:44,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:44,813 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:44,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1359754371, now seen corresponding path program 1 times [2024-11-19 09:51:44,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:44,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787656704] [2024-11-19 09:51:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:44,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:44,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:44,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:44,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:44,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787656704] [2024-11-19 09:51:44,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787656704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:44,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:44,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:51:44,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588074749] [2024-11-19 09:51:44,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:44,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:51:44,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:44,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:51:44,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:51:44,890 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:44,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:44,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:44,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:44,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:45,041 INFO L124 PetriNetUnfolderBase]: 1001/1468 cut-off events. [2024-11-19 09:51:45,041 INFO L125 PetriNetUnfolderBase]: For 904/904 co-relation queries the response was YES. [2024-11-19 09:51:45,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3605 conditions, 1468 events. 1001/1468 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6568 event pairs, 733 based on Foata normal form. 123/1413 useless extension candidates. Maximal degree in co-relation 794. Up to 1405 conditions per place. [2024-11-19 09:51:45,050 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 31 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-19 09:51:45,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 175 flow [2024-11-19 09:51:45,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:51:45,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:51:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-19 09:51:45,051 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-11-19 09:51:45,051 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 115 flow. Second operand 4 states and 68 transitions. [2024-11-19 09:51:45,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 175 flow [2024-11-19 09:51:45,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:51:45,054 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2024-11-19 09:51:45,055 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-19 09:51:45,055 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-19 09:51:45,056 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2024-11-19 09:51:45,056 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:45,057 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:45,057 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:45,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:51:45,057 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:45,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:45,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1083423898, now seen corresponding path program 1 times [2024-11-19 09:51:45,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:45,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56704720] [2024-11-19 09:51:45,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:45,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:45,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:45,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:45,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56704720] [2024-11-19 09:51:45,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56704720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:45,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743164940] [2024-11-19 09:51:45,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:45,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:45,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:45,173 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:45,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:51:45,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:45,240 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:51:45,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:45,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:45,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:45,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743164940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:45,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:45,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 09:51:45,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934873650] [2024-11-19 09:51:45,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:45,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:51:45,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:45,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:51:45,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:51:45,422 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:45,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:45,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:45,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:45,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:45,786 INFO L124 PetriNetUnfolderBase]: 1728/2523 cut-off events. [2024-11-19 09:51:45,786 INFO L125 PetriNetUnfolderBase]: For 1661/1661 co-relation queries the response was YES. [2024-11-19 09:51:45,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 2523 events. 1728/2523 cut-off events. For 1661/1661 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11932 event pairs, 1148 based on Foata normal form. 0/2237 useless extension candidates. Maximal degree in co-relation 4244. Up to 1681 conditions per place. [2024-11-19 09:51:45,802 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 69 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2024-11-19 09:51:45,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 404 flow [2024-11-19 09:51:45,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:51:45,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:51:45,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-19 09:51:45,803 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-11-19 09:51:45,803 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 7 states and 135 transitions. [2024-11-19 09:51:45,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 404 flow [2024-11-19 09:51:45,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 80 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:45,807 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 156 flow [2024-11-19 09:51:45,807 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-11-19 09:51:45,808 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2024-11-19 09:51:45,808 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 156 flow [2024-11-19 09:51:45,808 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:45,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:45,809 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:45,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:51:46,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:46,010 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:46,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:46,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1689668966, now seen corresponding path program 1 times [2024-11-19 09:51:46,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:46,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261980116] [2024-11-19 09:51:46,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:46,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:46,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:46,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:46,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261980116] [2024-11-19 09:51:46,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261980116] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747258185] [2024-11-19 09:51:46,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:46,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:46,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:46,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:46,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:51:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:46,176 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:51:46,177 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:46,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:46,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:46,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:46,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747258185] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:46,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:46,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:51:46,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244289935] [2024-11-19 09:51:46,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:46,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:51:46,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:46,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:51:46,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:51:46,369 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:46,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 156 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:46,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:46,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:46,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:46,803 INFO L124 PetriNetUnfolderBase]: 1788/2621 cut-off events. [2024-11-19 09:51:46,804 INFO L125 PetriNetUnfolderBase]: For 1585/1677 co-relation queries the response was YES. [2024-11-19 09:51:46,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6793 conditions, 2621 events. 1788/2621 cut-off events. For 1585/1677 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12682 event pairs, 1114 based on Foata normal form. 38/2421 useless extension candidates. Maximal degree in co-relation 4626. Up to 1826 conditions per place. [2024-11-19 09:51:46,822 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 74 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-11-19 09:51:46,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 456 flow [2024-11-19 09:51:46,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:51:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:51:46,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-11-19 09:51:46,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-19 09:51:46,824 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 156 flow. Second operand 8 states and 155 transitions. [2024-11-19 09:51:46,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 456 flow [2024-11-19 09:51:46,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:51:46,828 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 215 flow [2024-11-19 09:51:46,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2024-11-19 09:51:46,829 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-11-19 09:51:46,830 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 215 flow [2024-11-19 09:51:46,830 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:46,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:46,830 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:46,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:47,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:47,035 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:47,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:47,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1823740779, now seen corresponding path program 1 times [2024-11-19 09:51:47,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:47,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865197731] [2024-11-19 09:51:47,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:47,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:47,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:47,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865197731] [2024-11-19 09:51:47,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865197731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:47,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131695584] [2024-11-19 09:51:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:47,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:47,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:47,242 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:47,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:51:47,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:47,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:51:47,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:47,433 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:51:47,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131695584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:47,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:51:47,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-19 09:51:47,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932166768] [2024-11-19 09:51:47,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:47,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:51:47,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:47,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:51:47,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:51:47,465 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:51:47,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:47,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:47,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:51:47,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:47,812 INFO L124 PetriNetUnfolderBase]: 2001/3062 cut-off events. [2024-11-19 09:51:47,812 INFO L125 PetriNetUnfolderBase]: For 4359/4426 co-relation queries the response was YES. [2024-11-19 09:51:47,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8678 conditions, 3062 events. 2001/3062 cut-off events. For 4359/4426 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15779 event pairs, 1077 based on Foata normal form. 0/2835 useless extension candidates. Maximal degree in co-relation 5665. Up to 2134 conditions per place. [2024-11-19 09:51:47,827 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 60 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2024-11-19 09:51:47,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 469 flow [2024-11-19 09:51:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-19 09:51:47,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.384 [2024-11-19 09:51:47,829 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 215 flow. Second operand 5 states and 96 transitions. [2024-11-19 09:51:47,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 469 flow [2024-11-19 09:51:47,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 454 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-19 09:51:47,835 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 227 flow [2024-11-19 09:51:47,835 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-11-19 09:51:47,836 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-11-19 09:51:47,836 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 227 flow [2024-11-19 09:51:47,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:47,836 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:47,837 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:47,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:51:48,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:48,041 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:48,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:48,041 INFO L85 PathProgramCache]: Analyzing trace with hash -848433454, now seen corresponding path program 2 times [2024-11-19 09:51:48,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:48,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170543363] [2024-11-19 09:51:48,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:48,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:48,063 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:51:48,063 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:51:48,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:48,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170543363] [2024-11-19 09:51:48,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170543363] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:51:48,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:51:48,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:51:48,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203331983] [2024-11-19 09:51:48,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:48,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:51:48,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:48,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:51:48,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:51:48,265 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:48,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:48,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:48,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:48,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:48,774 INFO L124 PetriNetUnfolderBase]: 3212/4591 cut-off events. [2024-11-19 09:51:48,775 INFO L125 PetriNetUnfolderBase]: For 7092/7202 co-relation queries the response was YES. [2024-11-19 09:51:48,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14214 conditions, 4591 events. 3212/4591 cut-off events. For 7092/7202 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 21749 event pairs, 1290 based on Foata normal form. 0/4267 useless extension candidates. Maximal degree in co-relation 10987. Up to 2994 conditions per place. [2024-11-19 09:51:48,804 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 80 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-11-19 09:51:48,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 619 flow [2024-11-19 09:51:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:51:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:51:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-19 09:51:48,806 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-11-19 09:51:48,806 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 227 flow. Second operand 6 states and 117 transitions. [2024-11-19 09:51:48,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 619 flow [2024-11-19 09:51:48,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 604 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:51:48,813 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 261 flow [2024-11-19 09:51:48,813 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=261, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2024-11-19 09:51:48,814 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2024-11-19 09:51:48,814 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 261 flow [2024-11-19 09:51:48,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:48,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:48,814 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:48,815 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:51:48,815 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:48,815 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:48,815 INFO L85 PathProgramCache]: Analyzing trace with hash 384438138, now seen corresponding path program 2 times [2024-11-19 09:51:48,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:48,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018084364] [2024-11-19 09:51:48,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:48,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:48,831 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:48,831 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:51:49,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:49,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018084364] [2024-11-19 09:51:49,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018084364] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:49,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109250759] [2024-11-19 09:51:49,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:49,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:49,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:49,087 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:49,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:51:49,158 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:49,158 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:49,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:51:49,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:49,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:51:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:49,311 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:49,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109250759] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:49,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:49,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-19 09:51:49,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834050377] [2024-11-19 09:51:49,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:49,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:51:49,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:49,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:51:49,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:51:49,634 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2024-11-19 09:51:49,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 261 flow. Second operand has 19 states, 19 states have (on average 9.947368421052632) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:49,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:49,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2024-11-19 09:51:49,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:50,933 INFO L124 PetriNetUnfolderBase]: 4406/6146 cut-off events. [2024-11-19 09:51:50,933 INFO L125 PetriNetUnfolderBase]: For 7118/7949 co-relation queries the response was YES. [2024-11-19 09:51:50,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20226 conditions, 6146 events. 4406/6146 cut-off events. For 7118/7949 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 30451 event pairs, 650 based on Foata normal form. 578/6716 useless extension candidates. Maximal degree in co-relation 16310. Up to 1257 conditions per place. [2024-11-19 09:51:50,975 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 171 selfloop transitions, 18 changer transitions 0/193 dead transitions. [2024-11-19 09:51:50,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 193 transitions, 1191 flow [2024-11-19 09:51:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:51:50,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:51:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 275 transitions. [2024-11-19 09:51:50,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-11-19 09:51:50,977 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 261 flow. Second operand 14 states and 275 transitions. [2024-11-19 09:51:50,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 193 transitions, 1191 flow [2024-11-19 09:51:50,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 193 transitions, 1150 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-19 09:51:50,989 INFO L231 Difference]: Finished difference. Result has 75 places, 55 transitions, 319 flow [2024-11-19 09:51:50,989 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=319, PETRI_PLACES=75, PETRI_TRANSITIONS=55} [2024-11-19 09:51:50,990 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-11-19 09:51:50,990 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 55 transitions, 319 flow [2024-11-19 09:51:50,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 9.947368421052632) internal successors, (189), 19 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:50,991 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:50,991 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:51,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:51,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:51,196 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:51,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:51,196 INFO L85 PathProgramCache]: Analyzing trace with hash 275334849, now seen corresponding path program 1 times [2024-11-19 09:51:51,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:51,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746325379] [2024-11-19 09:51:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:51,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:51,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:51,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746325379] [2024-11-19 09:51:51,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746325379] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:51,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636592084] [2024-11-19 09:51:51,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:51,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:51,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:51,300 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:51,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:51:51,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:51,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:51:51,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:51,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:51,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:51,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636592084] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:51,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:51,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:51:51,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276537045] [2024-11-19 09:51:51,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:51,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:51:51,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:51:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:51:51,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:51,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 55 transitions, 319 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:51,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:51,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:51,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:52,278 INFO L124 PetriNetUnfolderBase]: 3957/5574 cut-off events. [2024-11-19 09:51:52,278 INFO L125 PetriNetUnfolderBase]: For 15114/15856 co-relation queries the response was YES. [2024-11-19 09:51:52,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19540 conditions, 5574 events. 3957/5574 cut-off events. For 15114/15856 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 26247 event pairs, 2614 based on Foata normal form. 344/5852 useless extension candidates. Maximal degree in co-relation 16522. Up to 4683 conditions per place. [2024-11-19 09:51:52,337 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 76 selfloop transitions, 10 changer transitions 0/92 dead transitions. [2024-11-19 09:51:52,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 92 transitions, 689 flow [2024-11-19 09:51:52,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:51:52,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:51:52,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-11-19 09:51:52,340 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3675 [2024-11-19 09:51:52,340 INFO L175 Difference]: Start difference. First operand has 75 places, 55 transitions, 319 flow. Second operand 8 states and 147 transitions. [2024-11-19 09:51:52,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 92 transitions, 689 flow [2024-11-19 09:51:52,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 92 transitions, 601 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-11-19 09:51:52,356 INFO L231 Difference]: Finished difference. Result has 75 places, 59 transitions, 320 flow [2024-11-19 09:51:52,357 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=320, PETRI_PLACES=75, PETRI_TRANSITIONS=59} [2024-11-19 09:51:52,357 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2024-11-19 09:51:52,359 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 59 transitions, 320 flow [2024-11-19 09:51:52,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:52,360 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:52,360 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:52,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:52,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:52,561 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:52,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:52,562 INFO L85 PathProgramCache]: Analyzing trace with hash 202087547, now seen corresponding path program 1 times [2024-11-19 09:51:52,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:52,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315610946] [2024-11-19 09:51:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:52,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:52,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:52,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315610946] [2024-11-19 09:51:52,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315610946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:52,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846365219] [2024-11-19 09:51:52,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:52,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:52,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:52,699 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:52,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:51:52,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:52,773 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:51:52,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:52,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:52,906 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:53,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846365219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:53,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:53,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-19 09:51:53,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424398552] [2024-11-19 09:51:53,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:53,007 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:51:53,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:53,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:51:53,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:51:53,075 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:53,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 59 transitions, 320 flow. Second operand has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:53,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:53,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:53,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:54,038 INFO L124 PetriNetUnfolderBase]: 6235/8905 cut-off events. [2024-11-19 09:51:54,039 INFO L125 PetriNetUnfolderBase]: For 15490/15788 co-relation queries the response was YES. [2024-11-19 09:51:54,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30167 conditions, 8905 events. 6235/8905 cut-off events. For 15490/15788 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 45920 event pairs, 3207 based on Foata normal form. 0/8764 useless extension candidates. Maximal degree in co-relation 16599. Up to 4783 conditions per place. [2024-11-19 09:51:54,106 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 123 selfloop transitions, 14 changer transitions 0/142 dead transitions. [2024-11-19 09:51:54,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 142 transitions, 1031 flow [2024-11-19 09:51:54,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:51:54,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:51:54,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-11-19 09:51:54,108 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-11-19 09:51:54,108 INFO L175 Difference]: Start difference. First operand has 75 places, 59 transitions, 320 flow. Second operand 9 states and 170 transitions. [2024-11-19 09:51:54,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 142 transitions, 1031 flow [2024-11-19 09:51:54,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 142 transitions, 1012 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-19 09:51:54,143 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 407 flow [2024-11-19 09:51:54,144 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=407, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2024-11-19 09:51:54,144 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 32 predicate places. [2024-11-19 09:51:54,145 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 407 flow [2024-11-19 09:51:54,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:54,145 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:54,145 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:54,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:54,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 09:51:54,350 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:54,350 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:54,350 INFO L85 PathProgramCache]: Analyzing trace with hash 537255637, now seen corresponding path program 2 times [2024-11-19 09:51:54,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:54,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741057003] [2024-11-19 09:51:54,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:54,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:54,374 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:54,374 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:51:54,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:54,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741057003] [2024-11-19 09:51:54,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741057003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:54,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603307459] [2024-11-19 09:51:54,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:54,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:54,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:54,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:54,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:51:54,649 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:54,650 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:54,651 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 09:51:54,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:51:54,883 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:55,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-19 09:51:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:51:55,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603307459] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:55,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:55,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 16 [2024-11-19 09:51:55,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446022796] [2024-11-19 09:51:55,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:55,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:51:55,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:55,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:51:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:51:55,396 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:55,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 407 flow. Second operand has 18 states, 18 states have (on average 11.61111111111111) internal successors, (209), 18 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:55,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:55,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:55,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:56,227 INFO L124 PetriNetUnfolderBase]: 5752/8070 cut-off events. [2024-11-19 09:51:56,227 INFO L125 PetriNetUnfolderBase]: For 19661/20819 co-relation queries the response was YES. [2024-11-19 09:51:56,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29337 conditions, 8070 events. 5752/8070 cut-off events. For 19661/20819 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 40436 event pairs, 1197 based on Foata normal form. 734/8795 useless extension candidates. Maximal degree in co-relation 21505. Up to 2646 conditions per place. [2024-11-19 09:51:56,291 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 128 selfloop transitions, 14 changer transitions 0/148 dead transitions. [2024-11-19 09:51:56,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 148 transitions, 1222 flow [2024-11-19 09:51:56,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:51:56,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:51:56,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-11-19 09:51:56,293 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37714285714285717 [2024-11-19 09:51:56,293 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 407 flow. Second operand 7 states and 132 transitions. [2024-11-19 09:51:56,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 148 transitions, 1222 flow [2024-11-19 09:51:56,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 148 transitions, 1201 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-19 09:51:56,325 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 434 flow [2024-11-19 09:51:56,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=434, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2024-11-19 09:51:56,326 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 36 predicate places. [2024-11-19 09:51:56,326 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 434 flow [2024-11-19 09:51:56,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.61111111111111) internal successors, (209), 18 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:56,327 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:56,327 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:56,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:56,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 09:51:56,531 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:56,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash 464008335, now seen corresponding path program 2 times [2024-11-19 09:51:56,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:56,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405438734] [2024-11-19 09:51:56,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:56,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:56,551 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:56,551 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:51:56,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:56,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405438734] [2024-11-19 09:51:56,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405438734] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:56,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878788863] [2024-11-19 09:51:56,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:51:56,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:56,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:56,764 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:56,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:51:56,841 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:51:56,841 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:51:56,842 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-19 09:51:56,844 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:56,855 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 [2024-11-19 09:51:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:51:57,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:57,605 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:51:57,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878788863] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:51:57,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:51:57,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:51:57,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012508743] [2024-11-19 09:51:57,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:51:57,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:51:57,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:57,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:51:57,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:51:57,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:57,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 434 flow. Second operand has 17 states, 17 states have (on average 11.294117647058824) internal successors, (192), 17 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:57,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:57,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:57,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:58,635 INFO L124 PetriNetUnfolderBase]: 5197/7319 cut-off events. [2024-11-19 09:51:58,635 INFO L125 PetriNetUnfolderBase]: For 19867/20187 co-relation queries the response was YES. [2024-11-19 09:51:58,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28443 conditions, 7319 events. 5197/7319 cut-off events. For 19867/20187 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 36918 event pairs, 1028 based on Foata normal form. 118/7296 useless extension candidates. Maximal degree in co-relation 22137. Up to 2303 conditions per place. [2024-11-19 09:51:58,737 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 127 selfloop transitions, 17 changer transitions 0/150 dead transitions. [2024-11-19 09:51:58,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 150 transitions, 1237 flow [2024-11-19 09:51:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:51:58,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:51:58,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-11-19 09:51:58,742 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-19 09:51:58,742 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 434 flow. Second operand 8 states and 152 transitions. [2024-11-19 09:51:58,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 150 transitions, 1237 flow [2024-11-19 09:51:58,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 150 transitions, 1144 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-11-19 09:51:58,808 INFO L231 Difference]: Finished difference. Result has 89 places, 65 transitions, 432 flow [2024-11-19 09:51:58,808 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=432, PETRI_PLACES=89, PETRI_TRANSITIONS=65} [2024-11-19 09:51:58,810 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 37 predicate places. [2024-11-19 09:51:58,810 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 65 transitions, 432 flow [2024-11-19 09:51:58,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.294117647058824) internal successors, (192), 17 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:58,810 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:58,811 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] [2024-11-19 09:51:58,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 09:51:59,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-19 09:51:59,011 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:51:59,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:51:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash -75547197, now seen corresponding path program 1 times [2024-11-19 09:51:59,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:51:59,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946023082] [2024-11-19 09:51:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:59,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:51:59,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:59,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:51:59,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946023082] [2024-11-19 09:51:59,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946023082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:59,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290508638] [2024-11-19 09:51:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:51:59,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:51:59,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:51:59,093 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:51:59,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:51:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:51:59,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:51:59,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:51:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:59,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:51:59,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:51:59,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290508638] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:51:59,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:51:59,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-19 09:51:59,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432063136] [2024-11-19 09:51:59,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:51:59,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:51:59,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:51:59,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:51:59,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:51:59,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:51:59,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 65 transitions, 432 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:59,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:51:59,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:51:59,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:51:59,827 INFO L124 PetriNetUnfolderBase]: 5333/7699 cut-off events. [2024-11-19 09:51:59,827 INFO L125 PetriNetUnfolderBase]: For 23408/23864 co-relation queries the response was YES. [2024-11-19 09:51:59,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29303 conditions, 7699 events. 5333/7699 cut-off events. For 23408/23864 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 39583 event pairs, 1743 based on Foata normal form. 196/7704 useless extension candidates. Maximal degree in co-relation 22896. Up to 4349 conditions per place. [2024-11-19 09:51:59,867 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 76 selfloop transitions, 10 changer transitions 0/91 dead transitions. [2024-11-19 09:51:59,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 91 transitions, 782 flow [2024-11-19 09:51:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:51:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:51:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-19 09:51:59,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.352 [2024-11-19 09:51:59,868 INFO L175 Difference]: Start difference. First operand has 89 places, 65 transitions, 432 flow. Second operand 5 states and 88 transitions. [2024-11-19 09:51:59,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 91 transitions, 782 flow [2024-11-19 09:51:59,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 91 transitions, 688 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-11-19 09:51:59,912 INFO L231 Difference]: Finished difference. Result has 86 places, 64 transitions, 401 flow [2024-11-19 09:51:59,912 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=401, PETRI_PLACES=86, PETRI_TRANSITIONS=64} [2024-11-19 09:51:59,912 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-11-19 09:51:59,913 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 64 transitions, 401 flow [2024-11-19 09:51:59,913 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:51:59,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:51:59,913 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:51:59,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 09:52:00,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 09:52:00,114 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:00,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:00,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1987981487, now seen corresponding path program 1 times [2024-11-19 09:52:00,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:00,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378218399] [2024-11-19 09:52:00,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:00,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:00,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:00,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378218399] [2024-11-19 09:52:00,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378218399] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:00,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216131496] [2024-11-19 09:52:00,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:00,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:00,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:00,169 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:00,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:52:00,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:00,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-19 09:52:00,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:00,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:00,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:00,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216131496] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:00,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:00,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-19 09:52:00,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416801722] [2024-11-19 09:52:00,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:00,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:52:00,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:00,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:52:00,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:52:00,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-19 09:52:00,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 64 transitions, 401 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:00,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:00,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-19 09:52:00,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:00,773 INFO L124 PetriNetUnfolderBase]: 4862/7018 cut-off events. [2024-11-19 09:52:00,773 INFO L125 PetriNetUnfolderBase]: For 21142/21664 co-relation queries the response was YES. [2024-11-19 09:52:00,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25232 conditions, 7018 events. 4862/7018 cut-off events. For 21142/21664 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 37044 event pairs, 1577 based on Foata normal form. 223/7037 useless extension candidates. Maximal degree in co-relation 19959. Up to 3757 conditions per place. [2024-11-19 09:52:00,866 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 72 selfloop transitions, 9 changer transitions 0/88 dead transitions. [2024-11-19 09:52:00,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 88 transitions, 723 flow [2024-11-19 09:52:00,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:52:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:52:00,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-19 09:52:00,867 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-19 09:52:00,867 INFO L175 Difference]: Start difference. First operand has 86 places, 64 transitions, 401 flow. Second operand 4 states and 76 transitions. [2024-11-19 09:52:00,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 88 transitions, 723 flow [2024-11-19 09:52:00,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 88 transitions, 700 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-19 09:52:00,886 INFO L231 Difference]: Finished difference. Result has 86 places, 62 transitions, 390 flow [2024-11-19 09:52:00,886 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=390, PETRI_PLACES=86, PETRI_TRANSITIONS=62} [2024-11-19 09:52:00,887 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-11-19 09:52:00,887 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 62 transitions, 390 flow [2024-11-19 09:52:00,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:00,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:00,887 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] [2024-11-19 09:52:00,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-19 09:52:01,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 09:52:01,091 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:01,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:01,092 INFO L85 PathProgramCache]: Analyzing trace with hash 263734697, now seen corresponding path program 1 times [2024-11-19 09:52:01,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:01,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392714609] [2024-11-19 09:52:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:01,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:01,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:01,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392714609] [2024-11-19 09:52:01,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392714609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:01,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341473600] [2024-11-19 09:52:01,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:52:01,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:01,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:01,599 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:01,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 09:52:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:52:01,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-19 09:52:01,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:01,744 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 15 treesize of output 1 [2024-11-19 09:52:02,276 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 85 treesize of output 61 [2024-11-19 09:52:02,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 57 [2024-11-19 09:52:02,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2024-11-19 09:52:02,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:02,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:03,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 173 [2024-11-19 09:52:03,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 169 [2024-11-19 09:52:04,459 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 109 treesize of output 99 [2024-11-19 09:52:04,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:04,481 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 128 treesize of output 122 [2024-11-19 09:52:04,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 187 [2024-11-19 09:52:04,776 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-19 09:52:04,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 235 treesize of output 1 [2024-11-19 09:52:04,786 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 229 treesize of output 205 [2024-11-19 09:52:04,801 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-19 09:52:04,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 1 [2024-11-19 09:52:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:04,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341473600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:04,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:04,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-19 09:52:04,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412245868] [2024-11-19 09:52:04,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:04,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 09:52:04,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:04,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 09:52:04,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-11-19 09:52:05,437 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:52:05,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 62 transitions, 390 flow. Second operand has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:05,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:05,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:52:05,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:07,486 INFO L124 PetriNetUnfolderBase]: 3957/6037 cut-off events. [2024-11-19 09:52:07,486 INFO L125 PetriNetUnfolderBase]: For 16438/16857 co-relation queries the response was YES. [2024-11-19 09:52:07,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22235 conditions, 6037 events. 3957/6037 cut-off events. For 16438/16857 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 32773 event pairs, 1063 based on Foata normal form. 1/6031 useless extension candidates. Maximal degree in co-relation 17736. Up to 4978 conditions per place. [2024-11-19 09:52:07,516 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 81 selfloop transitions, 18 changer transitions 47/155 dead transitions. [2024-11-19 09:52:07,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 155 transitions, 1185 flow [2024-11-19 09:52:07,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-19 09:52:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-19 09:52:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 284 transitions. [2024-11-19 09:52:07,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-11-19 09:52:07,518 INFO L175 Difference]: Start difference. First operand has 86 places, 62 transitions, 390 flow. Second operand 16 states and 284 transitions. [2024-11-19 09:52:07,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 155 transitions, 1185 flow [2024-11-19 09:52:07,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 155 transitions, 1155 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:52:07,550 INFO L231 Difference]: Finished difference. Result has 107 places, 72 transitions, 490 flow [2024-11-19 09:52:07,550 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=490, PETRI_PLACES=107, PETRI_TRANSITIONS=72} [2024-11-19 09:52:07,551 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 55 predicate places. [2024-11-19 09:52:07,551 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 72 transitions, 490 flow [2024-11-19 09:52:07,551 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:07,551 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:07,551 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] [2024-11-19 09:52:07,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:07,751 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 09:52:07,752 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:07,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:07,752 INFO L85 PathProgramCache]: Analyzing trace with hash -510558381, now seen corresponding path program 2 times [2024-11-19 09:52:07,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:07,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106018329] [2024-11-19 09:52:07,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:07,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:07,777 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:07,778 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:08,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:08,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106018329] [2024-11-19 09:52:08,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106018329] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:08,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884668388] [2024-11-19 09:52:08,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:52:08,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:08,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:08,354 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:08,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 09:52:08,437 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:52:08,437 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:08,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 09:52:08,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:08,480 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 15 treesize of output 1 [2024-11-19 09:52:08,774 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 75 treesize of output 51 [2024-11-19 09:52:08,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-19 09:52:08,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-11-19 09:52:08,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:08,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:09,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 173 [2024-11-19 09:52:09,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 169 [2024-11-19 09:52:10,764 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 246 treesize of output 228 [2024-11-19 09:52:10,829 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:10,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 281 treesize of output 311 [2024-11-19 09:52:44,179 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 294 treesize of output 264 [2024-11-19 09:52:44,196 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2024-11-19 09:52:44,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 387 treesize of output 1 [2024-11-19 09:52:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:44,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884668388] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:44,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:44,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 24 [2024-11-19 09:52:44,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635983559] [2024-11-19 09:52:44,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:44,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 09:52:44,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:44,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 09:52:44,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-19 09:52:44,609 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:52:44,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 72 transitions, 490 flow. Second operand has 25 states, 25 states have (on average 12.72) internal successors, (318), 25 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:44,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:44,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:52:44,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:47,168 INFO L124 PetriNetUnfolderBase]: 4170/6453 cut-off events. [2024-11-19 09:52:47,168 INFO L125 PetriNetUnfolderBase]: For 19091/19487 co-relation queries the response was YES. [2024-11-19 09:52:47,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24558 conditions, 6453 events. 4170/6453 cut-off events. For 19091/19487 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 36596 event pairs, 1216 based on Foata normal form. 11/6453 useless extension candidates. Maximal degree in co-relation 24516. Up to 5130 conditions per place. [2024-11-19 09:52:47,205 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 116 selfloop transitions, 72 changer transitions 38/235 dead transitions. [2024-11-19 09:52:47,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 235 transitions, 1965 flow [2024-11-19 09:52:47,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 09:52:47,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-19 09:52:47,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 512 transitions. [2024-11-19 09:52:47,208 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-11-19 09:52:47,208 INFO L175 Difference]: Start difference. First operand has 107 places, 72 transitions, 490 flow. Second operand 32 states and 512 transitions. [2024-11-19 09:52:47,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 235 transitions, 1965 flow [2024-11-19 09:52:47,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 235 transitions, 1906 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-11-19 09:52:47,238 INFO L231 Difference]: Finished difference. Result has 141 places, 128 transitions, 1158 flow [2024-11-19 09:52:47,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1158, PETRI_PLACES=141, PETRI_TRANSITIONS=128} [2024-11-19 09:52:47,238 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 89 predicate places. [2024-11-19 09:52:47,238 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 128 transitions, 1158 flow [2024-11-19 09:52:47,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.72) internal successors, (318), 25 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:47,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:47,239 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] [2024-11-19 09:52:47,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 09:52:47,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:47,440 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:47,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash 134319799, now seen corresponding path program 3 times [2024-11-19 09:52:47,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:47,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027661285] [2024-11-19 09:52:47,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:52:47,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:47,462 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:52:47,462 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:52:47,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:47,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027661285] [2024-11-19 09:52:47,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027661285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:47,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79089472] [2024-11-19 09:52:47,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:52:47,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:47,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:47,947 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:47,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 09:52:48,024 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:52:48,024 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:48,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 09:52:48,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:48,070 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 15 treesize of output 1 [2024-11-19 09:52:48,324 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 75 treesize of output 51 [2024-11-19 09:52:48,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-19 09:52:48,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-11-19 09:52:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:48,383 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:48,626 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 177 treesize of output 173 [2024-11-19 09:52:48,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 173 treesize of output 169 [2024-11-19 09:52:50,159 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 109 treesize of output 99 [2024-11-19 09:52:50,168 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:50,168 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 128 treesize of output 122 [2024-11-19 09:52:50,484 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 229 treesize of output 205 [2024-11-19 09:52:50,495 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-19 09:52:50,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 1 [2024-11-19 09:52:50,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 187 [2024-11-19 09:52:50,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:52:50,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 235 treesize of output 239 [2024-11-19 09:52:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:52,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79089472] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:52:52,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:52:52,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2024-11-19 09:52:52,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210333801] [2024-11-19 09:52:52,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:52:52,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 09:52:52,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:52:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 09:52:52,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2024-11-19 09:52:53,391 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-19 09:52:53,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 128 transitions, 1158 flow. Second operand has 25 states, 25 states have (on average 12.88) internal successors, (322), 25 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:53,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:52:53,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-19 09:52:53,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:52:56,303 INFO L124 PetriNetUnfolderBase]: 4323/6770 cut-off events. [2024-11-19 09:52:56,303 INFO L125 PetriNetUnfolderBase]: For 30071/30493 co-relation queries the response was YES. [2024-11-19 09:52:56,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29463 conditions, 6770 events. 4323/6770 cut-off events. For 30071/30493 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 39577 event pairs, 1145 based on Foata normal form. 3/6770 useless extension candidates. Maximal degree in co-relation 29400. Up to 5332 conditions per place. [2024-11-19 09:52:56,350 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 166 selfloop transitions, 79 changer transitions 41/295 dead transitions. [2024-11-19 09:52:56,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 295 transitions, 2999 flow [2024-11-19 09:52:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-19 09:52:56,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-11-19 09:52:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 526 transitions. [2024-11-19 09:52:56,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32875 [2024-11-19 09:52:56,352 INFO L175 Difference]: Start difference. First operand has 141 places, 128 transitions, 1158 flow. Second operand 32 states and 526 transitions. [2024-11-19 09:52:56,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 295 transitions, 2999 flow [2024-11-19 09:52:56,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 295 transitions, 2848 flow, removed 49 selfloop flow, removed 11 redundant places. [2024-11-19 09:52:56,420 INFO L231 Difference]: Finished difference. Result has 170 places, 169 transitions, 1747 flow [2024-11-19 09:52:56,420 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1066, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1747, PETRI_PLACES=170, PETRI_TRANSITIONS=169} [2024-11-19 09:52:56,420 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 118 predicate places. [2024-11-19 09:52:56,421 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 169 transitions, 1747 flow [2024-11-19 09:52:56,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 12.88) internal successors, (322), 25 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:52:56,421 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:52:56,421 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] [2024-11-19 09:52:56,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 09:52:56,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:56,622 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-19 09:52:56,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:52:56,622 INFO L85 PathProgramCache]: Analyzing trace with hash -735049199, now seen corresponding path program 4 times [2024-11-19 09:52:56,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:52:56,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611080212] [2024-11-19 09:52:56,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:52:56,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:52:56,639 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:52:56,639 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:57,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:52:57,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611080212] [2024-11-19 09:52:57,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611080212] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:52:57,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365831641] [2024-11-19 09:52:57,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:52:57,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:52:57,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:52:57,150 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:52:57,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 09:52:57,230 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:52:57,230 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:52:57,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-19 09:52:57,233 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:52:57,288 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 15 treesize of output 1 [2024-11-19 09:52:57,583 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 75 treesize of output 51 [2024-11-19 09:52:57,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 47 [2024-11-19 09:52:57,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2024-11-19 09:52:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:52:57,660 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:52:57,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 165 [2024-11-19 09:52:57,897 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 161