./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.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 cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:48:17,809 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:48:17,881 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:48:17,890 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:48:17,890 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:48:17,924 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:48:17,925 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:48:17,926 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:48:17,926 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:48:17,927 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:48:17,927 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:48:17,927 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:48:17,928 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:48:17,928 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:48:17,929 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:48:17,929 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:48:17,930 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:48:17,930 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:48:17,935 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:48:17,936 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:48:17,936 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:48:17,936 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:48:17,937 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:48:17,937 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:48:17,937 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:48:17,937 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:48:17,938 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:48:17,938 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:48:17,938 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:48:17,938 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:48:17,939 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:48:17,939 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:48:17,939 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:48:17,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:48:17,940 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:48:17,940 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:48:17,941 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:48:17,942 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:48:17,942 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:48:17,942 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:48:17,942 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:48:17,943 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:48:17,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd36b7f18dbd530fce94e0943ff58c16da276fcc41b96fdafde87c3c69036175 [2024-11-22 21:48:18,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:48:18,216 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:48:18,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:48:18,221 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:48:18,222 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:48:18,223 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2024-11-22 21:48:19,643 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:48:19,835 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:48:19,836 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2024-11-22 21:48:19,845 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ce80b67a/9ee22e511c2e4a52ac08f1cf601708e0/FLAG585f42879 [2024-11-22 21:48:20,229 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ce80b67a/9ee22e511c2e4a52ac08f1cf601708e0 [2024-11-22 21:48:20,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:48:20,234 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:48:20,235 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:48:20,235 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:48:20,240 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:48:20,240 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,241 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c35d308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20, skipping insertion in model container [2024-11-22 21:48:20,241 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,262 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:48:20,519 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:48:20,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:48:20,533 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:48:20,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:48:20,570 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:48:20,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20 WrapperNode [2024-11-22 21:48:20,571 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:48:20,572 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:48:20,573 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:48:20,573 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:48:20,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,590 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,619 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 13, calls inlined = 17, statements flattened = 186 [2024-11-22 21:48:20,620 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:48:20,620 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:48:20,621 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:48:20,621 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:48:20,633 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,633 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,636 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,652 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-22 21:48:20,652 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,653 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,659 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,663 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,666 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,669 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:48:20,670 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:48:20,670 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:48:20,671 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:48:20,671 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (1/1) ... [2024-11-22 21:48:20,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:48:20,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:20,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:48:20,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:48:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:48:20,749 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:48:20,749 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:48:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:48:20,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:48:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:48:20,750 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:48:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:48:20,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:48:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:48:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:48:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:48:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:48:20,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:48:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:48:20,751 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:48:20,753 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:48:20,860 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:48:20,863 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:48:21,210 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:48:21,211 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:48:21,491 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:48:21,492 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 21:48:21,492 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:48:21 BoogieIcfgContainer [2024-11-22 21:48:21,492 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:48:21,495 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:48:21,495 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:48:21,498 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:48:21,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:48:20" (1/3) ... [2024-11-22 21:48:21,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6761af62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:48:21, skipping insertion in model container [2024-11-22 21:48:21,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:20" (2/3) ... [2024-11-22 21:48:21,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6761af62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:48:21, skipping insertion in model container [2024-11-22 21:48:21,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:48:21" (3/3) ... [2024-11-22 21:48:21,503 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2024-11-22 21:48:21,518 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:48:21,519 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-22 21:48:21,519 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:48:21,586 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:48:21,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 45 transitions, 111 flow [2024-11-22 21:48:21,662 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2024-11-22 21:48:21,664 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:48:21,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 42 events. 4/42 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 77 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-11-22 21:48:21,668 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 45 transitions, 111 flow [2024-11-22 21:48:21,671 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 41 transitions, 100 flow [2024-11-22 21:48:21,680 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:48:21,686 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;@2122b8a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:48:21,686 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-22 21:48:21,690 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:48:21,690 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:48:21,690 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:48:21,691 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:21,695 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:48:21,696 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:21,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:21,724 INFO L85 PathProgramCache]: Analyzing trace with hash 606795, now seen corresponding path program 1 times [2024-11-22 21:48:21,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:21,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002312058] [2024-11-22 21:48:21,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:21,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:21,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:22,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:22,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002312058] [2024-11-22 21:48:22,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002312058] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:22,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:22,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:48:22,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063144358] [2024-11-22 21:48:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:22,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:48:22,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:22,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:48:22,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:48:22,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-22 21:48:22,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:22,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:22,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-22 21:48:22,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:22,267 INFO L124 PetriNetUnfolderBase]: 332/548 cut-off events. [2024-11-22 21:48:22,267 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-22 21:48:22,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 548 events. 332/548 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2187 event pairs, 226 based on Foata normal form. 1/501 useless extension candidates. Maximal degree in co-relation 933. Up to 481 conditions per place. [2024-11-22 21:48:22,275 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 23 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-22 21:48:22,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 38 transitions, 144 flow [2024-11-22 21:48:22,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:48:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:48:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-11-22 21:48:22,287 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-11-22 21:48:22,289 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 100 flow. Second operand 3 states and 78 transitions. [2024-11-22 21:48:22,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 38 transitions, 144 flow [2024-11-22 21:48:22,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 132 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:48:22,296 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 86 flow [2024-11-22 21:48:22,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, 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} [2024-11-22 21:48:22,301 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -7 predicate places. [2024-11-22 21:48:22,302 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 86 flow [2024-11-22 21:48:22,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:22,302 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:22,302 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:48:22,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:48:22,303 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:22,303 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:22,304 INFO L85 PathProgramCache]: Analyzing trace with hash 606796, now seen corresponding path program 1 times [2024-11-22 21:48:22,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:22,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022646418] [2024-11-22 21:48:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:22,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:22,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:22,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022646418] [2024-11-22 21:48:22,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022646418] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:22,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:22,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:48:22,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302188767] [2024-11-22 21:48:22,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:22,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:48:22,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:22,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:48:22,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:48:22,656 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-22 21:48:22,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:22,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:22,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-22 21:48:22,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:22,882 INFO L124 PetriNetUnfolderBase]: 333/551 cut-off events. [2024-11-22 21:48:22,883 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:48:22,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1060 conditions, 551 events. 333/551 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2191 event pairs, 226 based on Foata normal form. 0/503 useless extension candidates. Maximal degree in co-relation 1038. Up to 486 conditions per place. [2024-11-22 21:48:22,891 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 25 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-11-22 21:48:22,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 152 flow [2024-11-22 21:48:22,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:48:22,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:48:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-22 21:48:22,895 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-11-22 21:48:22,895 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 86 flow. Second operand 4 states and 98 transitions. [2024-11-22 21:48:22,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 152 flow [2024-11-22 21:48:22,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:22,898 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 109 flow [2024-11-22 21:48:22,900 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2024-11-22 21:48:22,901 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2024-11-22 21:48:22,901 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 109 flow [2024-11-22 21:48:22,901 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:22,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:22,901 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:48:22,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:48:22,902 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:22,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash 583150581, now seen corresponding path program 1 times [2024-11-22 21:48:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:22,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476091112] [2024-11-22 21:48:22,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:22,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:23,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:23,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476091112] [2024-11-22 21:48:23,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476091112] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:23,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619765619] [2024-11-22 21:48:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:23,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:23,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:23,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:23,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:48:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:23,262 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:48:23,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:23,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:48:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:23,575 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:23,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619765619] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:23,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:23,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:48:23,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008051450] [2024-11-22 21:48:23,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:23,740 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:48:23,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:23,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:48:23,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:48:23,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-22 21:48:23,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 109 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:23,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:23,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-22 21:48:23,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:24,190 INFO L124 PetriNetUnfolderBase]: 333/550 cut-off events. [2024-11-22 21:48:24,191 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:48:24,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1067 conditions, 550 events. 333/550 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2170 event pairs, 226 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 1045. Up to 482 conditions per place. [2024-11-22 21:48:24,195 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 21 selfloop transitions, 7 changer transitions 0/40 dead transitions. [2024-11-22 21:48:24,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 40 transitions, 161 flow [2024-11-22 21:48:24,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:48:24,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:48:24,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 131 transitions. [2024-11-22 21:48:24,198 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48518518518518516 [2024-11-22 21:48:24,198 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 109 flow. Second operand 6 states and 131 transitions. [2024-11-22 21:48:24,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 40 transitions, 161 flow [2024-11-22 21:48:24,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:48:24,199 INFO L231 Difference]: Finished difference. Result has 46 places, 40 transitions, 116 flow [2024-11-22 21:48:24,200 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=116, PETRI_PLACES=46, PETRI_TRANSITIONS=40} [2024-11-22 21:48:24,203 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -1 predicate places. [2024-11-22 21:48:24,203 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 40 transitions, 116 flow [2024-11-22 21:48:24,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:24,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:24,204 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:48:24,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:48:24,408 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:24,409 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:24,410 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:24,411 INFO L85 PathProgramCache]: Analyzing trace with hash 900186448, now seen corresponding path program 1 times [2024-11-22 21:48:24,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:24,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329812039] [2024-11-22 21:48:24,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:24,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:24,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:24,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329812039] [2024-11-22 21:48:24,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329812039] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:24,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:24,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:48:24,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295989918] [2024-11-22 21:48:24,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:24,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:48:24,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:48:24,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:48:24,500 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-11-22 21:48:24,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 40 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:24,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:24,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-11-22 21:48:24,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:24,597 INFO L124 PetriNetUnfolderBase]: 333/534 cut-off events. [2024-11-22 21:48:24,598 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:48:24,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1056 conditions, 534 events. 333/534 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2007 event pairs, 226 based on Foata normal form. 0/502 useless extension candidates. Maximal degree in co-relation 1030. Up to 481 conditions per place. [2024-11-22 21:48:24,601 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 25 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-22 21:48:24,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 37 transitions, 166 flow [2024-11-22 21:48:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:48:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:48:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2024-11-22 21:48:24,603 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-22 21:48:24,603 INFO L175 Difference]: Start difference. First operand has 46 places, 40 transitions, 116 flow. Second operand 4 states and 84 transitions. [2024-11-22 21:48:24,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 37 transitions, 166 flow [2024-11-22 21:48:24,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 136 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-22 21:48:24,606 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 86 flow [2024-11-22 21:48:24,607 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-22 21:48:24,607 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -8 predicate places. [2024-11-22 21:48:24,607 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 86 flow [2024-11-22 21:48:24,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:24,608 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:24,608 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:48:24,608 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:48:24,608 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:24,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:24,610 INFO L85 PathProgramCache]: Analyzing trace with hash 900186449, now seen corresponding path program 1 times [2024-11-22 21:48:24,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:24,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048482666] [2024-11-22 21:48:24,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:24,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:24,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:24,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:24,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:24,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048482666] [2024-11-22 21:48:24,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048482666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:24,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:24,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:48:24,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037828527] [2024-11-22 21:48:24,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:24,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:48:24,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:24,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:48:24,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:48:24,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-22 21:48:24,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:24,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:24,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-22 21:48:24,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:24,916 INFO L124 PetriNetUnfolderBase]: 719/1157 cut-off events. [2024-11-22 21:48:24,916 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-22 21:48:24,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2263 conditions, 1157 events. 719/1157 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5336 event pairs, 452 based on Foata normal form. 0/1075 useless extension candidates. Maximal degree in co-relation 1322. Up to 624 conditions per place. [2024-11-22 21:48:24,924 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 57 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2024-11-22 21:48:24,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 70 transitions, 284 flow [2024-11-22 21:48:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:48:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:48:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 148 transitions. [2024-11-22 21:48:24,929 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6577777777777778 [2024-11-22 21:48:24,929 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 86 flow. Second operand 5 states and 148 transitions. [2024-11-22 21:48:24,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 70 transitions, 284 flow [2024-11-22 21:48:24,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 70 transitions, 280 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:24,930 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 107 flow [2024-11-22 21:48:24,931 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=107, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2024-11-22 21:48:24,934 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, -4 predicate places. [2024-11-22 21:48:24,934 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 107 flow [2024-11-22 21:48:24,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:24,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:24,935 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:24,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:48:24,935 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:24,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:24,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1787792826, now seen corresponding path program 1 times [2024-11-22 21:48:24,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:24,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502865260] [2024-11-22 21:48:24,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:24,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:24,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:25,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:25,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:25,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502865260] [2024-11-22 21:48:25,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502865260] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:25,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:25,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:48:25,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460238641] [2024-11-22 21:48:25,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:25,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:48:25,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:25,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:48:25,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:48:25,019 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-22 21:48:25,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 107 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:25,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:25,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-22 21:48:25,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:25,208 INFO L124 PetriNetUnfolderBase]: 597/981 cut-off events. [2024-11-22 21:48:25,209 INFO L125 PetriNetUnfolderBase]: For 300/350 co-relation queries the response was YES. [2024-11-22 21:48:25,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2155 conditions, 981 events. 597/981 cut-off events. For 300/350 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4247 event pairs, 389 based on Foata normal form. 0/912 useless extension candidates. Maximal degree in co-relation 1380. Up to 598 conditions per place. [2024-11-22 21:48:25,215 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 52 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-11-22 21:48:25,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 65 transitions, 289 flow [2024-11-22 21:48:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:48:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:48:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-22 21:48:25,216 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-11-22 21:48:25,216 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 107 flow. Second operand 5 states and 143 transitions. [2024-11-22 21:48:25,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 65 transitions, 289 flow [2024-11-22 21:48:25,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 65 transitions, 284 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:25,219 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 127 flow [2024-11-22 21:48:25,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=127, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-11-22 21:48:25,220 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2024-11-22 21:48:25,221 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 127 flow [2024-11-22 21:48:25,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:25,222 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:25,222 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:25,223 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:48:25,223 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:25,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:25,223 INFO L85 PathProgramCache]: Analyzing trace with hash -500757752, now seen corresponding path program 1 times [2024-11-22 21:48:25,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:25,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093427448] [2024-11-22 21:48:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:25,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:25,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:25,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093427448] [2024-11-22 21:48:25,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093427448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:25,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174273828] [2024-11-22 21:48:25,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:25,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:25,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:25,430 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:25,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:48:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:25,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:48:25,493 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:25,568 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:25,616 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 22 treesize of output 18 [2024-11-22 21:48:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:25,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174273828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:25,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:25,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-22 21:48:25,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400964884] [2024-11-22 21:48:25,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:25,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:48:25,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:25,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:48:25,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:48:25,809 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-22 21:48:25,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 127 flow. Second operand has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:25,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:25,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-22 21:48:25,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:26,195 INFO L124 PetriNetUnfolderBase]: 755/1239 cut-off events. [2024-11-22 21:48:26,196 INFO L125 PetriNetUnfolderBase]: For 566/651 co-relation queries the response was YES. [2024-11-22 21:48:26,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2943 conditions, 1239 events. 755/1239 cut-off events. For 566/651 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5937 event pairs, 469 based on Foata normal form. 0/1153 useless extension candidates. Maximal degree in co-relation 2020. Up to 662 conditions per place. [2024-11-22 21:48:26,204 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 55 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-11-22 21:48:26,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 70 transitions, 323 flow [2024-11-22 21:48:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:48:26,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:48:26,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-11-22 21:48:26,205 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-22 21:48:26,205 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 127 flow. Second operand 6 states and 165 transitions. [2024-11-22 21:48:26,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 70 transitions, 323 flow [2024-11-22 21:48:26,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 318 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:26,208 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 151 flow [2024-11-22 21:48:26,208 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=151, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-11-22 21:48:26,209 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 4 predicate places. [2024-11-22 21:48:26,209 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 151 flow [2024-11-22 21:48:26,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.454545454545453) internal successors, (203), 11 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:26,209 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:26,209 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:26,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:48:26,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-22 21:48:26,414 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:26,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:26,414 INFO L85 PathProgramCache]: Analyzing trace with hash -191842740, now seen corresponding path program 1 times [2024-11-22 21:48:26,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:26,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756147618] [2024-11-22 21:48:26,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:26,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:26,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:26,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:26,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756147618] [2024-11-22 21:48:26,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756147618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:26,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101779491] [2024-11-22 21:48:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:26,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:26,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:26,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:26,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:48:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:26,592 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:26,594 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:26,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:26,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101779491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:26,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:26,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 21:48:26,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394257731] [2024-11-22 21:48:26,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:26,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:48:26,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:26,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:48:26,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:26,776 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-22 21:48:26,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 151 flow. Second operand has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 14 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:26,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:26,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-22 21:48:26,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:27,160 INFO L124 PetriNetUnfolderBase]: 1380/2203 cut-off events. [2024-11-22 21:48:27,160 INFO L125 PetriNetUnfolderBase]: For 1510/1633 co-relation queries the response was YES. [2024-11-22 21:48:27,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5749 conditions, 2203 events. 1380/2203 cut-off events. For 1510/1633 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11168 event pairs, 700 based on Foata normal form. 42/2218 useless extension candidates. Maximal degree in co-relation 2648. Up to 945 conditions per place. [2024-11-22 21:48:27,178 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 76 selfloop transitions, 13 changer transitions 0/97 dead transitions. [2024-11-22 21:48:27,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 97 transitions, 489 flow [2024-11-22 21:48:27,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:48:27,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:48:27,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-11-22 21:48:27,180 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-11-22 21:48:27,180 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 151 flow. Second operand 8 states and 218 transitions. [2024-11-22 21:48:27,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 97 transitions, 489 flow [2024-11-22 21:48:27,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 97 transitions, 474 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-22 21:48:27,185 INFO L231 Difference]: Finished difference. Result has 59 places, 50 transitions, 231 flow [2024-11-22 21:48:27,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=231, PETRI_PLACES=59, PETRI_TRANSITIONS=50} [2024-11-22 21:48:27,188 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 12 predicate places. [2024-11-22 21:48:27,188 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 50 transitions, 231 flow [2024-11-22 21:48:27,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.714285714285715) internal successors, (262), 14 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:27,189 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:27,189 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:27,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:48:27,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:27,390 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:27,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:27,390 INFO L85 PathProgramCache]: Analyzing trace with hash 62288855, now seen corresponding path program 1 times [2024-11-22 21:48:27,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:27,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589945840] [2024-11-22 21:48:27,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:27,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:27,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:27,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589945840] [2024-11-22 21:48:27,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589945840] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:27,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:27,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:48:27,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878687878] [2024-11-22 21:48:27,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:27,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:48:27,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:27,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:48:27,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:48:27,494 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-22 21:48:27,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 50 transitions, 231 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:27,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:27,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-22 21:48:27,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:27,763 INFO L124 PetriNetUnfolderBase]: 1211/1928 cut-off events. [2024-11-22 21:48:27,763 INFO L125 PetriNetUnfolderBase]: For 4479/4989 co-relation queries the response was YES. [2024-11-22 21:48:27,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5756 conditions, 1928 events. 1211/1928 cut-off events. For 4479/4989 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 9499 event pairs, 841 based on Foata normal form. 0/1829 useless extension candidates. Maximal degree in co-relation 3898. Up to 1548 conditions per place. [2024-11-22 21:48:27,779 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 56 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2024-11-22 21:48:27,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 69 transitions, 421 flow [2024-11-22 21:48:27,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:48:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:48:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-11-22 21:48:27,781 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-11-22 21:48:27,781 INFO L175 Difference]: Start difference. First operand has 59 places, 50 transitions, 231 flow. Second operand 5 states and 138 transitions. [2024-11-22 21:48:27,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 69 transitions, 421 flow [2024-11-22 21:48:27,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 69 transitions, 414 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-11-22 21:48:27,789 INFO L231 Difference]: Finished difference. Result has 64 places, 52 transitions, 249 flow [2024-11-22 21:48:27,790 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2024-11-22 21:48:27,791 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 17 predicate places. [2024-11-22 21:48:27,792 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 249 flow [2024-11-22 21:48:27,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:27,793 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:27,793 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:27,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 21:48:27,793 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:27,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:27,794 INFO L85 PathProgramCache]: Analyzing trace with hash -194820687, now seen corresponding path program 1 times [2024-11-22 21:48:27,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:27,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483078345] [2024-11-22 21:48:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:27,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:27,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:27,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483078345] [2024-11-22 21:48:27,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483078345] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:27,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131535339] [2024-11-22 21:48:27,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:27,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:27,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:27,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:48:28,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:28,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:48:28,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:28,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:28,101 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:28,146 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 22 treesize of output 18 [2024-11-22 21:48:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:28,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131535339] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:28,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:28,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-22 21:48:28,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944863314] [2024-11-22 21:48:28,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:28,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:48:28,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:28,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:48:28,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:48:28,279 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-22 21:48:28,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 249 flow. Second operand has 11 states, 11 states have (on average 18.818181818181817) internal successors, (207), 11 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:28,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:28,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-22 21:48:28,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:28,768 INFO L124 PetriNetUnfolderBase]: 1767/2892 cut-off events. [2024-11-22 21:48:28,768 INFO L125 PetriNetUnfolderBase]: For 5905/6651 co-relation queries the response was YES. [2024-11-22 21:48:28,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8505 conditions, 2892 events. 1767/2892 cut-off events. For 5905/6651 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 16155 event pairs, 736 based on Foata normal form. 0/2731 useless extension candidates. Maximal degree in co-relation 7650. Up to 1370 conditions per place. [2024-11-22 21:48:28,818 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 81 selfloop transitions, 10 changer transitions 0/99 dead transitions. [2024-11-22 21:48:28,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 99 transitions, 649 flow [2024-11-22 21:48:28,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:48:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:48:28,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-11-22 21:48:28,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-11-22 21:48:28,821 INFO L175 Difference]: Start difference. First operand has 64 places, 52 transitions, 249 flow. Second operand 7 states and 190 transitions. [2024-11-22 21:48:28,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 99 transitions, 649 flow [2024-11-22 21:48:28,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 644 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:28,831 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 288 flow [2024-11-22 21:48:28,832 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=288, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2024-11-22 21:48:28,833 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 23 predicate places. [2024-11-22 21:48:28,834 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 288 flow [2024-11-22 21:48:28,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.818181818181817) internal successors, (207), 11 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:28,834 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:28,834 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:28,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:48:29,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:29,039 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:29,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:29,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1482050691, now seen corresponding path program 2 times [2024-11-22 21:48:29,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:29,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46467479] [2024-11-22 21:48:29,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:29,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:29,072 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:29,074 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:29,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:48:29,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:29,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46467479] [2024-11-22 21:48:29,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46467479] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:29,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975346788] [2024-11-22 21:48:29,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:29,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:29,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:29,341 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:29,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:48:29,404 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:29,405 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:29,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:48:29,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:29,523 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:29,624 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-22 21:48:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:29,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975346788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:29,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:29,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-22 21:48:29,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606596467] [2024-11-22 21:48:29,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:29,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 21:48:29,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:29,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 21:48:29,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-11-22 21:48:30,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-22 21:48:30,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 288 flow. Second operand has 19 states, 19 states have (on average 17.789473684210527) internal successors, (338), 19 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:30,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:30,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-22 21:48:30,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:31,425 INFO L124 PetriNetUnfolderBase]: 2575/3832 cut-off events. [2024-11-22 21:48:31,426 INFO L125 PetriNetUnfolderBase]: For 7286/7830 co-relation queries the response was YES. [2024-11-22 21:48:31,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13239 conditions, 3832 events. 2575/3832 cut-off events. For 7286/7830 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 19783 event pairs, 511 based on Foata normal form. 0/3802 useless extension candidates. Maximal degree in co-relation 7162. Up to 722 conditions per place. [2024-11-22 21:48:31,454 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 166 selfloop transitions, 25 changer transitions 0/198 dead transitions. [2024-11-22 21:48:31,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 198 transitions, 1279 flow [2024-11-22 21:48:31,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:48:31,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:48:31,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 380 transitions. [2024-11-22 21:48:31,457 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-11-22 21:48:31,457 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 288 flow. Second operand 14 states and 380 transitions. [2024-11-22 21:48:31,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 198 transitions, 1279 flow [2024-11-22 21:48:31,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 198 transitions, 1248 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-11-22 21:48:31,473 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 389 flow [2024-11-22 21:48:31,473 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=389, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2024-11-22 21:48:31,473 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 33 predicate places. [2024-11-22 21:48:31,473 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 389 flow [2024-11-22 21:48:31,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 17.789473684210527) internal successors, (338), 19 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:31,474 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:31,474 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:31,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-22 21:48:31,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-22 21:48:31,679 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:31,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:31,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1736182286, now seen corresponding path program 1 times [2024-11-22 21:48:31,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:31,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670466468] [2024-11-22 21:48:31,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:31,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:31,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:31,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:31,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670466468] [2024-11-22 21:48:31,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670466468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:31,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231650940] [2024-11-22 21:48:31,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:31,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:31,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:31,909 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:31,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:48:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:31,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-22 21:48:31,982 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:32,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:32,135 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:48:32,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231650940] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:32,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:48:32,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-22 21:48:32,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160446073] [2024-11-22 21:48:32,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:32,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:48:32,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:32,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:48:32,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:48:32,233 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-22 21:48:32,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 389 flow. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:32,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:32,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-22 21:48:32,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:32,789 INFO L124 PetriNetUnfolderBase]: 2659/4021 cut-off events. [2024-11-22 21:48:32,790 INFO L125 PetriNetUnfolderBase]: For 15592/16501 co-relation queries the response was YES. [2024-11-22 21:48:32,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15712 conditions, 4021 events. 2659/4021 cut-off events. For 15592/16501 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 21255 event pairs, 801 based on Foata normal form. 208/3937 useless extension candidates. Maximal degree in co-relation 10915. Up to 1632 conditions per place. [2024-11-22 21:48:32,819 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 95 selfloop transitions, 10 changer transitions 0/113 dead transitions. [2024-11-22 21:48:32,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 113 transitions, 1009 flow [2024-11-22 21:48:32,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:48:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:48:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-11-22 21:48:32,821 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5296296296296297 [2024-11-22 21:48:32,821 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 389 flow. Second operand 6 states and 143 transitions. [2024-11-22 21:48:32,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 113 transitions, 1009 flow [2024-11-22 21:48:32,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 113 transitions, 842 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-11-22 21:48:32,836 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 334 flow [2024-11-22 21:48:32,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-11-22 21:48:32,837 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 27 predicate places. [2024-11-22 21:48:32,837 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 334 flow [2024-11-22 21:48:32,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:32,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:32,837 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:32,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:48:33,041 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:33,042 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:33,042 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:33,042 INFO L85 PathProgramCache]: Analyzing trace with hash -501318250, now seen corresponding path program 1 times [2024-11-22 21:48:33,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:33,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722148041] [2024-11-22 21:48:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:33,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:33,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:33,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:33,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:33,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722148041] [2024-11-22 21:48:33,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722148041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:33,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415829672] [2024-11-22 21:48:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:33,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:33,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:33,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:33,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:48:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:33,218 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:48:33,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:33,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:33,321 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:33,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:33,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415829672] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:33,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:33,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-22 21:48:33,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989936362] [2024-11-22 21:48:33,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:33,387 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:48:33,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:33,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:48:33,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:48:33,463 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 45 [2024-11-22 21:48:33,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 334 flow. Second operand has 15 states, 15 states have (on average 19.133333333333333) internal successors, (287), 15 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:33,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:33,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 45 [2024-11-22 21:48:33,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:34,047 INFO L124 PetriNetUnfolderBase]: 2499/3831 cut-off events. [2024-11-22 21:48:34,047 INFO L125 PetriNetUnfolderBase]: For 8322/8821 co-relation queries the response was YES. [2024-11-22 21:48:34,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13366 conditions, 3831 events. 2499/3831 cut-off events. For 8322/8821 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19732 event pairs, 1232 based on Foata normal form. 96/3811 useless extension candidates. Maximal degree in co-relation 8882. Up to 2011 conditions per place. [2024-11-22 21:48:34,077 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 91 selfloop transitions, 13 changer transitions 0/112 dead transitions. [2024-11-22 21:48:34,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 112 transitions, 790 flow [2024-11-22 21:48:34,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:48:34,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:48:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-11-22 21:48:34,080 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-11-22 21:48:34,080 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 334 flow. Second operand 8 states and 214 transitions. [2024-11-22 21:48:34,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 112 transitions, 790 flow [2024-11-22 21:48:34,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 112 transitions, 748 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:48:34,097 INFO L231 Difference]: Finished difference. Result has 79 places, 64 transitions, 382 flow [2024-11-22 21:48:34,098 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=382, PETRI_PLACES=79, PETRI_TRANSITIONS=64} [2024-11-22 21:48:34,098 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 32 predicate places. [2024-11-22 21:48:34,099 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 64 transitions, 382 flow [2024-11-22 21:48:34,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 19.133333333333333) internal successors, (287), 15 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:34,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:34,099 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:34,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 21:48:34,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:34,303 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:34,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:34,304 INFO L85 PathProgramCache]: Analyzing trace with hash 540024909, now seen corresponding path program 2 times [2024-11-22 21:48:34,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:34,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276052015] [2024-11-22 21:48:34,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:34,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:34,322 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:34,323 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:34,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:48:34,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:34,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276052015] [2024-11-22 21:48:34,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276052015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:34,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862085941] [2024-11-22 21:48:34,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:34,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:34,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:34,563 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:34,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:48:34,634 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:34,635 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:34,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-22 21:48:34,638 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:34,764 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:34,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-22 21:48:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:34,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862085941] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:34,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:34,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 17 [2024-11-22 21:48:34,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283850904] [2024-11-22 21:48:34,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:34,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-22 21:48:34,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:34,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-22 21:48:34,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2024-11-22 21:48:35,303 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-22 21:48:35,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 64 transitions, 382 flow. Second operand has 19 states, 19 states have (on average 18.263157894736842) internal successors, (347), 19 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:35,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:35,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-22 21:48:35,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:36,283 INFO L124 PetriNetUnfolderBase]: 3221/4854 cut-off events. [2024-11-22 21:48:36,284 INFO L125 PetriNetUnfolderBase]: For 11513/12130 co-relation queries the response was YES. [2024-11-22 21:48:36,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17331 conditions, 4854 events. 3221/4854 cut-off events. For 11513/12130 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 24483 event pairs, 519 based on Foata normal form. 195/4939 useless extension candidates. Maximal degree in co-relation 11339. Up to 804 conditions per place. [2024-11-22 21:48:36,321 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 160 selfloop transitions, 25 changer transitions 0/192 dead transitions. [2024-11-22 21:48:36,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 192 transitions, 1341 flow [2024-11-22 21:48:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:48:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:48:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 367 transitions. [2024-11-22 21:48:36,323 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5825396825396826 [2024-11-22 21:48:36,323 INFO L175 Difference]: Start difference. First operand has 79 places, 64 transitions, 382 flow. Second operand 14 states and 367 transitions. [2024-11-22 21:48:36,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 192 transitions, 1341 flow [2024-11-22 21:48:36,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 192 transitions, 1325 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-22 21:48:36,343 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 487 flow [2024-11-22 21:48:36,343 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=487, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2024-11-22 21:48:36,344 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 42 predicate places. [2024-11-22 21:48:36,344 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 487 flow [2024-11-22 21:48:36,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 18.263157894736842) internal successors, (347), 19 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:36,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:36,346 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:36,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 21:48:36,550 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,SelfDestructingSolverStorable13 [2024-11-22 21:48:36,551 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:36,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:36,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1146426108, now seen corresponding path program 1 times [2024-11-22 21:48:36,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:36,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316699070] [2024-11-22 21:48:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:36,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:36,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:36,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316699070] [2024-11-22 21:48:36,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316699070] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:36,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:36,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:48:36,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714242089] [2024-11-22 21:48:36,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:36,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:48:36,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:36,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:48:36,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:48:36,597 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-22 21:48:36,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 487 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:36,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:36,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-22 21:48:36,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:37,198 INFO L124 PetriNetUnfolderBase]: 4777/7082 cut-off events. [2024-11-22 21:48:37,198 INFO L125 PetriNetUnfolderBase]: For 24224/25110 co-relation queries the response was YES. [2024-11-22 21:48:37,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27163 conditions, 7082 events. 4777/7082 cut-off events. For 24224/25110 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 36973 event pairs, 982 based on Foata normal form. 62/6989 useless extension candidates. Maximal degree in co-relation 17739. Up to 5401 conditions per place. [2024-11-22 21:48:37,260 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 80 selfloop transitions, 6 changer transitions 8/102 dead transitions. [2024-11-22 21:48:37,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 102 transitions, 876 flow [2024-11-22 21:48:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:48:37,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:48:37,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-22 21:48:37,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7037037037037037 [2024-11-22 21:48:37,262 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 487 flow. Second operand 3 states and 95 transitions. [2024-11-22 21:48:37,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 102 transitions, 876 flow [2024-11-22 21:48:37,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 102 transitions, 786 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-11-22 21:48:37,297 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 424 flow [2024-11-22 21:48:37,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2024-11-22 21:48:37,298 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 35 predicate places. [2024-11-22 21:48:37,298 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 424 flow [2024-11-22 21:48:37,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:37,299 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:37,299 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] [2024-11-22 21:48:37,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:48:37,299 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:37,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:37,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1305244317, now seen corresponding path program 1 times [2024-11-22 21:48:37,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:37,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79395888] [2024-11-22 21:48:37,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:37,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:37,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:37,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:37,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79395888] [2024-11-22 21:48:37,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79395888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:37,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125284658] [2024-11-22 21:48:37,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:37,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:37,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:37,396 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:37,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:48:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:37,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:37,474 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:37,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:37,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125284658] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:37,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:48:37,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-22 21:48:37,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777132080] [2024-11-22 21:48:37,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:37,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:48:37,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:37,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:48:37,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:37,645 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-22 21:48:37,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 424 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:37,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:37,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-22 21:48:37,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:38,346 INFO L124 PetriNetUnfolderBase]: 4997/7492 cut-off events. [2024-11-22 21:48:38,346 INFO L125 PetriNetUnfolderBase]: For 21078/21748 co-relation queries the response was YES. [2024-11-22 21:48:38,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28061 conditions, 7492 events. 4997/7492 cut-off events. For 21078/21748 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 42124 event pairs, 958 based on Foata normal form. 80/7001 useless extension candidates. Maximal degree in co-relation 18451. Up to 1937 conditions per place. [2024-11-22 21:48:38,395 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 162 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2024-11-22 21:48:38,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 193 transitions, 1612 flow [2024-11-22 21:48:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:48:38,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:48:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-11-22 21:48:38,398 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2024-11-22 21:48:38,399 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 424 flow. Second operand 9 states and 231 transitions. [2024-11-22 21:48:38,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 193 transitions, 1612 flow [2024-11-22 21:48:38,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 193 transitions, 1363 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-11-22 21:48:38,464 INFO L231 Difference]: Finished difference. Result has 78 places, 82 transitions, 478 flow [2024-11-22 21:48:38,465 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=478, PETRI_PLACES=78, PETRI_TRANSITIONS=82} [2024-11-22 21:48:38,465 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 31 predicate places. [2024-11-22 21:48:38,465 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 82 transitions, 478 flow [2024-11-22 21:48:38,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:38,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:38,466 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] [2024-11-22 21:48:38,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-22 21:48:38,670 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,SelfDestructingSolverStorable15 [2024-11-22 21:48:38,671 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:38,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:38,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1304915659, now seen corresponding path program 2 times [2024-11-22 21:48:38,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:38,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828763840] [2024-11-22 21:48:38,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:38,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:38,693 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:38,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:38,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:38,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828763840] [2024-11-22 21:48:38,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828763840] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:38,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054014322] [2024-11-22 21:48:38,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:38,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:38,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:38,837 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:38,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:48:38,912 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:38,912 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:38,913 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:38,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:38,969 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:39,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054014322] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:39,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:48:39,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-22 21:48:39,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202015432] [2024-11-22 21:48:39,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:39,044 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:48:39,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:39,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:48:39,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:39,064 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-22 21:48:39,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 82 transitions, 478 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:39,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:39,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-22 21:48:39,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:39,907 INFO L124 PetriNetUnfolderBase]: 6097/9128 cut-off events. [2024-11-22 21:48:39,907 INFO L125 PetriNetUnfolderBase]: For 18687/19101 co-relation queries the response was YES. [2024-11-22 21:48:39,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31501 conditions, 9128 events. 6097/9128 cut-off events. For 18687/19101 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 51642 event pairs, 949 based on Foata normal form. 137/8953 useless extension candidates. Maximal degree in co-relation 22327. Up to 2171 conditions per place. [2024-11-22 21:48:39,968 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 175 selfloop transitions, 42 changer transitions 0/225 dead transitions. [2024-11-22 21:48:39,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 225 transitions, 1729 flow [2024-11-22 21:48:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:48:39,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:48:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-11-22 21:48:39,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5530864197530864 [2024-11-22 21:48:39,970 INFO L175 Difference]: Start difference. First operand has 78 places, 82 transitions, 478 flow. Second operand 9 states and 224 transitions. [2024-11-22 21:48:39,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 225 transitions, 1729 flow [2024-11-22 21:48:40,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 225 transitions, 1726 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:40,026 INFO L231 Difference]: Finished difference. Result has 90 places, 110 transitions, 842 flow [2024-11-22 21:48:40,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=842, PETRI_PLACES=90, PETRI_TRANSITIONS=110} [2024-11-22 21:48:40,027 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 43 predicate places. [2024-11-22 21:48:40,027 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 110 transitions, 842 flow [2024-11-22 21:48:40,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:40,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:40,027 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] [2024-11-22 21:48:40,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 21:48:40,228 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,SelfDestructingSolverStorable16 [2024-11-22 21:48:40,228 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:40,229 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:40,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1394146479, now seen corresponding path program 3 times [2024-11-22 21:48:40,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:40,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087495835] [2024-11-22 21:48:40,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:48:40,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:40,252 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:48:40,253 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:40,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:40,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087495835] [2024-11-22 21:48:40,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087495835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:40,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257919834] [2024-11-22 21:48:40,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:48:40,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:40,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:40,362 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:40,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:48:40,450 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:48:40,450 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:40,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:40,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:40,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:40,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257919834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:40,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:40,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-22 21:48:40,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699025582] [2024-11-22 21:48:40,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:40,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:48:40,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:40,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:48:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:40,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-22 21:48:40,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 110 transitions, 842 flow. Second operand has 14 states, 14 states have (on average 18.642857142857142) internal successors, (261), 14 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:40,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:40,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-22 21:48:40,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:41,947 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([592] L47-->L46-7: Formula: (let ((.cse1 (* |v_thread1Thread1of1ForFork0_~i~0#1_9| 4))) (let ((.cse0 (+ .cse1 v_~A~0.offset_99))) (and (= |v_thread1Thread1of1ForFork0_plus_#res#1_1| (+ (select (select |v_#memory_int#1_66| v_~A~0.base_102) .cse0) v_~res1~0_60)) (not (= (ite (or (<= |v_thread1Thread1of1ForFork0_plus_#res#1_1| 2147483647) (<= |v_thread1Thread1of1ForFork0_plus_#res#1_1| v_~res1~0_60)) 1 0) 0)) (= |v_thread1Thread1of1ForFork0_plus_#res#1_1| v_~res1~0_59) (= (select |v_#valid_134| v_~A~0.base_102) 1) (= |v_thread1Thread1of1ForFork0_~i~0#1_10| (+ |v_thread1Thread1of1ForFork0_~i~0#1_9| 1)) (not (= (ite (or (<= v_~res1~0_60 |v_thread1Thread1of1ForFork0_plus_#res#1_1|) (<= 0 (+ |v_thread1Thread1of1ForFork0_plus_#res#1_1| 2147483648))) 1 0) 0)) (<= 0 (+ v_~res1~0_59 2147483648)) (<= (+ .cse1 v_~A~0.offset_99 4) (select |v_#length_123| v_~A~0.base_102)) (<= 0 .cse0) (<= v_~res1~0_59 2147483647)))) InVars {~res1~0=v_~res1~0_60, ~A~0.base=v_~A~0.base_102, ~A~0.offset=v_~A~0.offset_99, thread1Thread1of1ForFork0_~i~0#1=|v_thread1Thread1of1ForFork0_~i~0#1_9|, #valid=|v_#valid_134|, #length=|v_#length_123|, #memory_int#1=|v_#memory_int#1_66|} OutVars{~res1~0=v_~res1~0_59, ~A~0.base=v_~A~0.base_102, thread1Thread1of1ForFork0_~tmp~0#1=|v_thread1Thread1of1ForFork0_~tmp~0#1_1|, thread1Thread1of1ForFork0_plus_~a#1=|v_thread1Thread1of1ForFork0_plus_~a#1_1|, thread1Thread1of1ForFork0_plus_#in~a#1=|v_thread1Thread1of1ForFork0_plus_#in~a#1_1|, thread1Thread1of1ForFork0_plus_~b#1=|v_thread1Thread1of1ForFork0_plus_~b#1_1|, #memory_int#1=|v_#memory_int#1_66|, thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1_1|, ~A~0.offset=v_~A~0.offset_99, thread1Thread1of1ForFork0_#t~post3#1=|v_thread1Thread1of1ForFork0_#t~post3#1_1|, thread1Thread1of1ForFork0_~i~0#1=|v_thread1Thread1of1ForFork0_~i~0#1_10|, thread1Thread1of1ForFork0_#t~ret2#1=|v_thread1Thread1of1ForFork0_#t~ret2#1_1|, #valid=|v_#valid_134|, thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1_1|, #length=|v_#length_123|, thread1Thread1of1ForFork0_plus_#in~b#1=|v_thread1Thread1of1ForFork0_plus_#in~b#1_1|, thread1Thread1of1ForFork0_plus_#res#1=|v_thread1Thread1of1ForFork0_plus_#res#1_1|, thread1Thread1of1ForFork0_#t~mem1#1=|v_thread1Thread1of1ForFork0_#t~mem1#1_1|} AuxVars[] AssignedVars[~res1~0, thread1Thread1of1ForFork0_~tmp~0#1, thread1Thread1of1ForFork0_plus_~a#1, thread1Thread1of1ForFork0_plus_#in~a#1, thread1Thread1of1ForFork0_plus_~b#1, thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1, thread1Thread1of1ForFork0_#t~post3#1, thread1Thread1of1ForFork0_~i~0#1, thread1Thread1of1ForFork0_#t~ret2#1, thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1, thread1Thread1of1ForFork0_plus_#in~b#1, thread1Thread1of1ForFork0_plus_#res#1, thread1Thread1of1ForFork0_#t~mem1#1][277], [24#L46-7true, Black: 585#(and (or (< ~N~0 2) (< (+ |ULTIMATE.start_create_fresh_int_array_~i~3#1| 1) |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= ~M~0 1) (<= 0 ~M~0) (<= 1 |thread2Thread1of1ForFork1_~i~1#1|)), 109#(= (select |#valid| ~A~0.base) 1), Black: 266#(and (= ~A~0.offset 0) (<= 4 (select |#length| ~A~0.base))), Black: 884#(<= 1 ~N~0), Black: 593#(and (= ~A~0.offset 0) (<= (* ~M~0 4) (select |#length| ~A~0.base)) (= |thread2Thread1of1ForFork1_~i~1#1| 0)), Black: 1027#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~M~0) (<= 1 ~N~0)), Black: 713#(and (= ~A~0.offset 0) (<= (* ~M~0 4) (select |#length| ~A~0.base)) (<= 8 (select |#length| ~A~0.base)) (<= 0 |thread2Thread1of1ForFork1_~i~1#1|)), 877#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~N~0) (<= (+ |thread3Thread1of1ForFork2_~i~2#1| 1) ~N~0) (<= 1 ~N~0)), Black: 1029#(and (<= 1 ~N~0) (or (< |thread3Thread1of1ForFork2_~i~2#1| ~N~0) (< 0 ~M~0))), Black: 1031#(and (<= 1 ~N~0) (<= 1 ~M~0)), Black: 1035#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), Black: 720#(= ~res2~0 ~res1~0), 15#L65true, 180#true, 22#L85-4true, 1197#(and (<= |thread2Thread1of1ForFork1_~i~1#1| 0) (<= (+ |thread3Thread1of1ForFork2_~i~2#1| 1) ~N~0) (<= 1 ~N~0)), 9#L57-1true, 709#(and (= ~A~0.offset 0) (<= (* ~M~0 4) (select |#length| ~A~0.base)) (= |thread2Thread1of1ForFork1_~i~1#1| 0) (<= 8 (select |#length| ~A~0.base))), Black: 871#(and (<= (+ ~M~0 1) ~N~0) (<= 1 ~N~0)), Black: 875#(and (<= (+ ~M~0 1) ~N~0) (<= (+ |thread3Thread1of1ForFork2_~i~2#1| 1) ~N~0) (<= 1 ~N~0)), Black: 337#(and (= |thread1Thread1of1ForFork0_~i~0#1| 0) (= ~A~0.offset 0) (<= (* ~N~0 4) (select |#length| ~A~0.base))), 1033#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~M~0) (<= 1 ~N~0) (or (< |thread3Thread1of1ForFork2_~i~2#1| ~N~0) (< 0 ~M~0))), Black: 433#(and (= ~A~0.offset 0) (<= (* ~N~0 4) (select |#length| ~A~0.base)) (<= 1 |thread1Thread1of1ForFork0_~i~0#1|) (<= 8 (select |#length| ~A~0.base))), Black: 214#(and (<= ~N~0 1) (<= 1 |thread1Thread1of1ForFork0_~i~0#1|)), 431#(and (= ~A~0.offset 0) (= |thread1Thread1of1ForFork0_~i~0#1| 1) (<= (* ~N~0 4) (select |#length| ~A~0.base)) (<= 8 (select |#length| ~A~0.base)))]) [2024-11-22 21:48:41,947 INFO L294 olderBase$Statistics]: this new event has 24 ancestors and is cut-off event [2024-11-22 21:48:41,947 INFO L297 olderBase$Statistics]: existing Event has 24 ancestors and is cut-off event [2024-11-22 21:48:41,947 INFO L297 olderBase$Statistics]: existing Event has 20 ancestors and is cut-off event [2024-11-22 21:48:41,947 INFO L297 olderBase$Statistics]: existing Event has 20 ancestors and is cut-off event [2024-11-22 21:48:42,003 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([592] L47-->L46-7: Formula: (let ((.cse1 (* |v_thread1Thread1of1ForFork0_~i~0#1_9| 4))) (let ((.cse0 (+ .cse1 v_~A~0.offset_99))) (and (= |v_thread1Thread1of1ForFork0_plus_#res#1_1| (+ (select (select |v_#memory_int#1_66| v_~A~0.base_102) .cse0) v_~res1~0_60)) (not (= (ite (or (<= |v_thread1Thread1of1ForFork0_plus_#res#1_1| 2147483647) (<= |v_thread1Thread1of1ForFork0_plus_#res#1_1| v_~res1~0_60)) 1 0) 0)) (= |v_thread1Thread1of1ForFork0_plus_#res#1_1| v_~res1~0_59) (= (select |v_#valid_134| v_~A~0.base_102) 1) (= |v_thread1Thread1of1ForFork0_~i~0#1_10| (+ |v_thread1Thread1of1ForFork0_~i~0#1_9| 1)) (not (= (ite (or (<= v_~res1~0_60 |v_thread1Thread1of1ForFork0_plus_#res#1_1|) (<= 0 (+ |v_thread1Thread1of1ForFork0_plus_#res#1_1| 2147483648))) 1 0) 0)) (<= 0 (+ v_~res1~0_59 2147483648)) (<= (+ .cse1 v_~A~0.offset_99 4) (select |v_#length_123| v_~A~0.base_102)) (<= 0 .cse0) (<= v_~res1~0_59 2147483647)))) InVars {~res1~0=v_~res1~0_60, ~A~0.base=v_~A~0.base_102, ~A~0.offset=v_~A~0.offset_99, thread1Thread1of1ForFork0_~i~0#1=|v_thread1Thread1of1ForFork0_~i~0#1_9|, #valid=|v_#valid_134|, #length=|v_#length_123|, #memory_int#1=|v_#memory_int#1_66|} OutVars{~res1~0=v_~res1~0_59, ~A~0.base=v_~A~0.base_102, thread1Thread1of1ForFork0_~tmp~0#1=|v_thread1Thread1of1ForFork0_~tmp~0#1_1|, thread1Thread1of1ForFork0_plus_~a#1=|v_thread1Thread1of1ForFork0_plus_~a#1_1|, thread1Thread1of1ForFork0_plus_#in~a#1=|v_thread1Thread1of1ForFork0_plus_#in~a#1_1|, thread1Thread1of1ForFork0_plus_~b#1=|v_thread1Thread1of1ForFork0_plus_~b#1_1|, #memory_int#1=|v_#memory_int#1_66|, thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1_1|, ~A~0.offset=v_~A~0.offset_99, thread1Thread1of1ForFork0_#t~post3#1=|v_thread1Thread1of1ForFork0_#t~post3#1_1|, thread1Thread1of1ForFork0_~i~0#1=|v_thread1Thread1of1ForFork0_~i~0#1_10|, thread1Thread1of1ForFork0_#t~ret2#1=|v_thread1Thread1of1ForFork0_#t~ret2#1_1|, #valid=|v_#valid_134|, thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1=|v_thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1_1|, #length=|v_#length_123|, thread1Thread1of1ForFork0_plus_#in~b#1=|v_thread1Thread1of1ForFork0_plus_#in~b#1_1|, thread1Thread1of1ForFork0_plus_#res#1=|v_thread1Thread1of1ForFork0_plus_#res#1_1|, thread1Thread1of1ForFork0_#t~mem1#1=|v_thread1Thread1of1ForFork0_#t~mem1#1_1|} AuxVars[] AssignedVars[~res1~0, thread1Thread1of1ForFork0_~tmp~0#1, thread1Thread1of1ForFork0_plus_~a#1, thread1Thread1of1ForFork0_plus_#in~a#1, thread1Thread1of1ForFork0_plus_~b#1, thread1Thread1of1ForFork0_assume_abort_if_not_#in~cond#1, thread1Thread1of1ForFork0_#t~post3#1, thread1Thread1of1ForFork0_~i~0#1, thread1Thread1of1ForFork0_#t~ret2#1, thread1Thread1of1ForFork0_assume_abort_if_not_~cond#1, thread1Thread1of1ForFork0_plus_#in~b#1, thread1Thread1of1ForFork0_plus_#res#1, thread1Thread1of1ForFork0_#t~mem1#1][277], [24#L46-7true, Black: 266#(and (= ~A~0.offset 0) (<= 4 (select |#length| ~A~0.base))), 109#(= (select |#valid| ~A~0.base) 1), Black: 585#(and (or (< ~N~0 2) (< (+ |ULTIMATE.start_create_fresh_int_array_~i~3#1| 1) |ULTIMATE.start_create_fresh_int_array_~size#1|)) (<= ~M~0 1) (<= 0 ~M~0) (<= 1 |thread2Thread1of1ForFork1_~i~1#1|)), Black: 593#(and (= ~A~0.offset 0) (<= (* ~M~0 4) (select |#length| ~A~0.base)) (= |thread2Thread1of1ForFork1_~i~1#1| 0)), Black: 884#(<= 1 ~N~0), Black: 1027#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~M~0) (<= 1 ~N~0)), Black: 713#(and (= ~A~0.offset 0) (<= (* ~M~0 4) (select |#length| ~A~0.base)) (<= 8 (select |#length| ~A~0.base)) (<= 0 |thread2Thread1of1ForFork1_~i~1#1|)), 877#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~N~0) (<= (+ |thread3Thread1of1ForFork2_~i~2#1| 1) ~N~0) (<= 1 ~N~0)), Black: 1029#(and (<= 1 ~N~0) (or (< |thread3Thread1of1ForFork2_~i~2#1| ~N~0) (< 0 ~M~0))), Black: 1031#(and (<= 1 ~N~0) (<= 1 ~M~0)), Black: 1035#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~M~0) (<= 1 ~N~0) (<= 1 ~M~0)), Black: 720#(= ~res2~0 ~res1~0), 15#L65true, 180#true, 1197#(and (<= |thread2Thread1of1ForFork1_~i~1#1| 0) (<= (+ |thread3Thread1of1ForFork2_~i~2#1| 1) ~N~0) (<= 1 ~N~0)), 709#(and (= ~A~0.offset 0) (<= (* ~M~0 4) (select |#length| ~A~0.base)) (= |thread2Thread1of1ForFork1_~i~1#1| 0) (<= 8 (select |#length| ~A~0.base))), 9#L57-1true, Black: 871#(and (<= (+ ~M~0 1) ~N~0) (<= 1 ~N~0)), Black: 875#(and (<= (+ ~M~0 1) ~N~0) (<= (+ |thread3Thread1of1ForFork2_~i~2#1| 1) ~N~0) (<= 1 ~N~0)), 4#L86true, Black: 337#(and (= |thread1Thread1of1ForFork0_~i~0#1| 0) (= ~A~0.offset 0) (<= (* ~N~0 4) (select |#length| ~A~0.base))), 1033#(and (<= (+ |thread2Thread1of1ForFork1_~i~1#1| 1) ~M~0) (<= 1 ~N~0) (or (< |thread3Thread1of1ForFork2_~i~2#1| ~N~0) (< 0 ~M~0))), Black: 433#(and (= ~A~0.offset 0) (<= (* ~N~0 4) (select |#length| ~A~0.base)) (<= 1 |thread1Thread1of1ForFork0_~i~0#1|) (<= 8 (select |#length| ~A~0.base))), Black: 214#(and (<= ~N~0 1) (<= 1 |thread1Thread1of1ForFork0_~i~0#1|)), 431#(and (= ~A~0.offset 0) (= |thread1Thread1of1ForFork0_~i~0#1| 1) (<= (* ~N~0 4) (select |#length| ~A~0.base)) (<= 8 (select |#length| ~A~0.base)))]) [2024-11-22 21:48:42,004 INFO L294 olderBase$Statistics]: this new event has 25 ancestors and is cut-off event [2024-11-22 21:48:42,004 INFO L297 olderBase$Statistics]: existing Event has 25 ancestors and is cut-off event [2024-11-22 21:48:42,004 INFO L297 olderBase$Statistics]: existing Event has 21 ancestors and is cut-off event [2024-11-22 21:48:42,004 INFO L297 olderBase$Statistics]: existing Event has 21 ancestors and is cut-off event [2024-11-22 21:48:42,279 INFO L124 PetriNetUnfolderBase]: 10028/14899 cut-off events. [2024-11-22 21:48:42,279 INFO L125 PetriNetUnfolderBase]: For 54842/55488 co-relation queries the response was YES. [2024-11-22 21:48:42,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60284 conditions, 14899 events. 10028/14899 cut-off events. For 54842/55488 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 90106 event pairs, 1596 based on Foata normal form. 242/14723 useless extension candidates. Maximal degree in co-relation 51165. Up to 3970 conditions per place. [2024-11-22 21:48:42,524 INFO L140 encePairwiseOnDemand]: 32/45 looper letters, 253 selfloop transitions, 100 changer transitions 0/361 dead transitions. [2024-11-22 21:48:42,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 361 transitions, 3188 flow [2024-11-22 21:48:42,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 21:48:42,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 21:48:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 399 transitions. [2024-11-22 21:48:42,526 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-11-22 21:48:42,526 INFO L175 Difference]: Start difference. First operand has 90 places, 110 transitions, 842 flow. Second operand 16 states and 399 transitions. [2024-11-22 21:48:42,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 361 transitions, 3188 flow [2024-11-22 21:48:42,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 361 transitions, 3165 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:42,825 INFO L231 Difference]: Finished difference. Result has 111 places, 166 transitions, 1785 flow [2024-11-22 21:48:42,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1785, PETRI_PLACES=111, PETRI_TRANSITIONS=166} [2024-11-22 21:48:42,826 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 64 predicate places. [2024-11-22 21:48:42,827 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 166 transitions, 1785 flow [2024-11-22 21:48:42,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.642857142857142) internal successors, (261), 14 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:42,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:42,827 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] [2024-11-22 21:48:42,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-22 21:48:43,028 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,SelfDestructingSolverStorable17 [2024-11-22 21:48:43,029 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:43,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:43,029 INFO L85 PathProgramCache]: Analyzing trace with hash 647655281, now seen corresponding path program 4 times [2024-11-22 21:48:43,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:43,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373264877] [2024-11-22 21:48:43,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:48:43,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:43,058 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:48:43,058 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:43,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:43,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373264877] [2024-11-22 21:48:43,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373264877] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:43,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932623271] [2024-11-22 21:48:43,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:48:43,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:43,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:43,124 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:43,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:48:43,201 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:48:43,202 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:43,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:48:43,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:43,267 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:43,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932623271] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:43,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:43,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-22 21:48:43,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351883335] [2024-11-22 21:48:43,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:43,318 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:48:43,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:43,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:48:43,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:48:43,365 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 45 [2024-11-22 21:48:43,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 166 transitions, 1785 flow. Second operand has 12 states, 12 states have (on average 17.5) internal successors, (210), 12 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:43,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:43,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 45 [2024-11-22 21:48:43,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:47,734 INFO L124 PetriNetUnfolderBase]: 19090/28698 cut-off events. [2024-11-22 21:48:47,734 INFO L125 PetriNetUnfolderBase]: For 178561/178622 co-relation queries the response was YES. [2024-11-22 21:48:47,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133590 conditions, 28698 events. 19090/28698 cut-off events. For 178561/178622 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 191638 event pairs, 1478 based on Foata normal form. 59/27589 useless extension candidates. Maximal degree in co-relation 120757. Up to 4977 conditions per place. [2024-11-22 21:48:48,008 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 596 selfloop transitions, 520 changer transitions 0/1121 dead transitions. [2024-11-22 21:48:48,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 1121 transitions, 13899 flow [2024-11-22 21:48:48,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-22 21:48:48,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-22 21:48:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 862 transitions. [2024-11-22 21:48:48,011 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5473015873015873 [2024-11-22 21:48:48,011 INFO L175 Difference]: Start difference. First operand has 111 places, 166 transitions, 1785 flow. Second operand 35 states and 862 transitions. [2024-11-22 21:48:48,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 1121 transitions, 13899 flow [2024-11-22 21:48:49,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 1121 transitions, 13200 flow, removed 149 selfloop flow, removed 6 redundant places. [2024-11-22 21:48:49,515 INFO L231 Difference]: Finished difference. Result has 169 places, 629 transitions, 9000 flow [2024-11-22 21:48:49,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1670, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9000, PETRI_PLACES=169, PETRI_TRANSITIONS=629} [2024-11-22 21:48:49,517 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 122 predicate places. [2024-11-22 21:48:49,517 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 629 transitions, 9000 flow [2024-11-22 21:48:49,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.5) internal successors, (210), 12 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:49,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:49,518 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] [2024-11-22 21:48:49,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 21:48:49,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:49,718 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:49,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:49,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1284491843, now seen corresponding path program 5 times [2024-11-22 21:48:49,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:49,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223233601] [2024-11-22 21:48:49,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:48:49,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:49,733 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:49,734 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:49,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:48:49,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:49,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223233601] [2024-11-22 21:48:49,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223233601] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:49,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:49,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-22 21:48:49,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320126933] [2024-11-22 21:48:49,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:49,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:48:49,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:49,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:48:49,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:48:49,842 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-22 21:48:49,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 629 transitions, 9000 flow. Second operand has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:49,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:49,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-22 21:48:49,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:55,789 INFO L124 PetriNetUnfolderBase]: 21168/31995 cut-off events. [2024-11-22 21:48:55,790 INFO L125 PetriNetUnfolderBase]: For 322406/323474 co-relation queries the response was YES. [2024-11-22 21:48:56,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175110 conditions, 31995 events. 21168/31995 cut-off events. For 322406/323474 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 218251 event pairs, 5941 based on Foata normal form. 455/31637 useless extension candidates. Maximal degree in co-relation 171709. Up to 15315 conditions per place. [2024-11-22 21:48:56,535 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 545 selfloop transitions, 178 changer transitions 7/868 dead transitions. [2024-11-22 21:48:56,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 868 transitions, 12863 flow [2024-11-22 21:48:56,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:48:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:48:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-11-22 21:48:56,536 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-11-22 21:48:56,536 INFO L175 Difference]: Start difference. First operand has 169 places, 629 transitions, 9000 flow. Second operand 7 states and 190 transitions. [2024-11-22 21:48:56,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 868 transitions, 12863 flow [2024-11-22 21:48:59,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 868 transitions, 12703 flow, removed 80 selfloop flow, removed 0 redundant places. [2024-11-22 21:48:59,737 INFO L231 Difference]: Finished difference. Result has 179 places, 684 transitions, 10436 flow [2024-11-22 21:48:59,738 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=8884, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10436, PETRI_PLACES=179, PETRI_TRANSITIONS=684} [2024-11-22 21:48:59,738 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 132 predicate places. [2024-11-22 21:48:59,738 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 684 transitions, 10436 flow [2024-11-22 21:48:59,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.142857142857142) internal successors, (134), 7 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:59,739 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:59,739 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] [2024-11-22 21:48:59,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-22 21:48:59,739 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:48:59,739 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:59,739 INFO L85 PathProgramCache]: Analyzing trace with hash 713234439, now seen corresponding path program 6 times [2024-11-22 21:48:59,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:59,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957632728] [2024-11-22 21:48:59,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:48:59,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:59,752 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:48:59,752 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:59,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:59,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957632728] [2024-11-22 21:48:59,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957632728] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:59,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502849230] [2024-11-22 21:48:59,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:48:59,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:59,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:59,855 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:59,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:48:59,936 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:48:59,936 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:48:59,938 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:59,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:00,005 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:49:00,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502849230] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:00,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:49:00,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-22 21:49:00,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6157915] [2024-11-22 21:49:00,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:00,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:49:00,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:00,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:49:00,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:49:00,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-22 21:49:00,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 684 transitions, 10436 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:00,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:00,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-22 21:49:00,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:05,933 INFO L124 PetriNetUnfolderBase]: 21350/32505 cut-off events. [2024-11-22 21:49:05,933 INFO L125 PetriNetUnfolderBase]: For 329644/331277 co-relation queries the response was YES. [2024-11-22 21:49:06,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180097 conditions, 32505 events. 21350/32505 cut-off events. For 329644/331277 co-relation queries the response was YES. Maximal size of possible extension queue 1135. Compared 225969 event pairs, 3576 based on Foata normal form. 532/32284 useless extension candidates. Maximal degree in co-relation 176649. Up to 8159 conditions per place. [2024-11-22 21:49:06,740 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 481 selfloop transitions, 450 changer transitions 0/946 dead transitions. [2024-11-22 21:49:06,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 946 transitions, 14934 flow [2024-11-22 21:49:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:49:06,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:49:06,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-11-22 21:49:06,741 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5851851851851851 [2024-11-22 21:49:06,742 INFO L175 Difference]: Start difference. First operand has 179 places, 684 transitions, 10436 flow. Second operand 9 states and 237 transitions. [2024-11-22 21:49:06,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 946 transitions, 14934 flow [2024-11-22 21:49:11,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 946 transitions, 14798 flow, removed 68 selfloop flow, removed 1 redundant places. [2024-11-22 21:49:11,089 INFO L231 Difference]: Finished difference. Result has 188 places, 753 transitions, 12898 flow [2024-11-22 21:49:11,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=10290, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12898, PETRI_PLACES=188, PETRI_TRANSITIONS=753} [2024-11-22 21:49:11,090 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 141 predicate places. [2024-11-22 21:49:11,090 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 753 transitions, 12898 flow [2024-11-22 21:49:11,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:11,090 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:11,091 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] [2024-11-22 21:49:11,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:11,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-22 21:49:11,291 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:49:11,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:11,292 INFO L85 PathProgramCache]: Analyzing trace with hash 134994227, now seen corresponding path program 7 times [2024-11-22 21:49:11,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:11,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479779781] [2024-11-22 21:49:11,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:49:11,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:11,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:11,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:11,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479779781] [2024-11-22 21:49:11,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479779781] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:11,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919790735] [2024-11-22 21:49:11,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:49:11,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:11,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:11,394 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:11,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:49:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:49:11,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:49:11,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:11,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:11,548 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:11,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919790735] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:11,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:49:11,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-22 21:49:11,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928491115] [2024-11-22 21:49:11,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:11,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:49:11,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:11,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:49:11,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:49:11,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-22 21:49:11,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 753 transitions, 12898 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:11,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:11,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-22 21:49:11,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:49:17,980 INFO L124 PetriNetUnfolderBase]: 21386/32456 cut-off events. [2024-11-22 21:49:17,980 INFO L125 PetriNetUnfolderBase]: For 401414/403000 co-relation queries the response was YES. [2024-11-22 21:49:18,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186853 conditions, 32456 events. 21386/32456 cut-off events. For 401414/403000 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 223640 event pairs, 2710 based on Foata normal form. 540/32269 useless extension candidates. Maximal degree in co-relation 185070. Up to 11101 conditions per place. [2024-11-22 21:49:18,798 INFO L140 encePairwiseOnDemand]: 35/45 looper letters, 362 selfloop transitions, 510 changer transitions 0/887 dead transitions. [2024-11-22 21:49:18,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 887 transitions, 15552 flow [2024-11-22 21:49:18,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:49:18,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:49:18,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-11-22 21:49:18,800 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-11-22 21:49:18,800 INFO L175 Difference]: Start difference. First operand has 188 places, 753 transitions, 12898 flow. Second operand 8 states and 208 transitions. [2024-11-22 21:49:18,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 887 transitions, 15552 flow [2024-11-22 21:49:24,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 887 transitions, 15401 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-11-22 21:49:24,305 INFO L231 Difference]: Finished difference. Result has 194 places, 753 transitions, 14285 flow [2024-11-22 21:49:24,306 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=12625, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=747, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=504, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14285, PETRI_PLACES=194, PETRI_TRANSITIONS=753} [2024-11-22 21:49:24,306 INFO L277 CegarLoopForPetriNet]: 47 programPoint places, 147 predicate places. [2024-11-22 21:49:24,306 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 753 transitions, 14285 flow [2024-11-22 21:49:24,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:24,306 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:49:24,306 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] [2024-11-22 21:49:24,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-22 21:49:24,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:24,507 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-22 21:49:24,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:49:24,507 INFO L85 PathProgramCache]: Analyzing trace with hash -462450047, now seen corresponding path program 8 times [2024-11-22 21:49:24,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:49:24,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547250505] [2024-11-22 21:49:24,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:24,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:49:24,520 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:24,520 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:24,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:49:24,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547250505] [2024-11-22 21:49:24,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547250505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:24,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627648565] [2024-11-22 21:49:24,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:49:24,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:49:24,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:49:24,628 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:49:24,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:49:24,714 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:49:24,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:49:24,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:49:24,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:49:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:24,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:49:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:49:24,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627648565] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:49:24,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:49:24,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 14 [2024-11-22 21:49:24,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653129245] [2024-11-22 21:49:24,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:49:24,888 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:49:24,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:49:24,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:49:24,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:49:24,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 45 [2024-11-22 21:49:24,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 753 transitions, 14285 flow. Second operand has 7 states, 7 states have (on average 19.0) internal successors, (133), 7 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:49:24,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:49:24,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 45 [2024-11-22 21:49:24,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand