./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:54:12,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:54:12,333 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:54:12,337 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:54:12,338 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:54:12,360 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:54:12,360 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:54:12,361 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:54:12,361 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:54:12,362 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:54:12,362 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:54:12,362 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:54:12,363 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:54:12,363 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:54:12,363 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:54:12,363 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:54:12,364 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:54:12,364 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:54:12,366 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:54:12,366 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:54:12,368 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:54:12,368 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:54:12,369 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:54:12,369 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:54:12,369 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:54:12,369 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:54:12,369 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:54:12,369 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:54:12,370 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:54:12,370 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:54:12,370 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:54:12,370 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:54:12,370 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:54:12,370 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:54:12,371 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:54:12,371 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:54:12,371 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:54:12,372 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:54:12,372 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:54:12,372 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:54:12,372 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:54:12,373 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:54:12,373 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 37731ec014f4053387ac8b56c0764486866d63670c206743514c9636df9b594a [2024-11-09 10:54:12,652 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:54:12,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:54:12,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:54:12,674 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:54:12,674 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:54:12,676 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-09 10:54:14,227 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:54:14,405 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:54:14,406 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sum-array-hom.wvr.c [2024-11-09 10:54:14,412 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e5c25c8/7e425053d6ae4796be026d696a962fe2/FLAGd9ec8cb21 [2024-11-09 10:54:14,424 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b1e5c25c8/7e425053d6ae4796be026d696a962fe2 [2024-11-09 10:54:14,426 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:54:14,427 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:54:14,428 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:54:14,428 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:54:14,440 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:54:14,441 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,442 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@724429ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14, skipping insertion in model container [2024-11-09 10:54:14,442 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,461 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:54:14,642 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:54:14,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:54:14,653 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:54:14,676 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:54:14,693 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:54:14,693 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14 WrapperNode [2024-11-09 10:54:14,694 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:54:14,694 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:54:14,695 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:54:14,695 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:54:14,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,707 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,724 INFO L138 Inliner]: procedures = 24, calls = 20, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2024-11-09 10:54:14,725 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:54:14,727 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:54:14,727 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:54:14,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:54:14,735 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,735 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,737 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,749 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]. [2024-11-09 10:54:14,750 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,750 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,756 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,759 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,760 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,761 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,763 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:54:14,764 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:54:14,764 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:54:14,764 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:54:14,765 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (1/1) ... [2024-11-09 10:54:14,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:54:14,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:14,802 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) [2024-11-09 10:54:14,805 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 [2024-11-09 10:54:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:54:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:54:14,866 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:54:14,866 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:54:14,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:54:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:54:14,867 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:54:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:54:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:54:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:54:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:54:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:54:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:54:14,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:54:14,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:54:14,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:54:14,873 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:54:14,994 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:54:14,995 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:54:15,215 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:54:15,215 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:54:15,405 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:54:15,405 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-09 10:54:15,405 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:54:15 BoogieIcfgContainer [2024-11-09 10:54:15,405 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:54:15,407 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:54:15,407 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:54:15,409 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:54:15,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:54:14" (1/3) ... [2024-11-09 10:54:15,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b23974f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:54:15, skipping insertion in model container [2024-11-09 10:54:15,410 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:54:14" (2/3) ... [2024-11-09 10:54:15,410 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b23974f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:54:15, skipping insertion in model container [2024-11-09 10:54:15,411 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:54:15" (3/3) ... [2024-11-09 10:54:15,412 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sum-array-hom.wvr.c [2024-11-09 10:54:15,425 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:54:15,425 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-09 10:54:15,425 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:54:15,461 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:54:15,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 41 transitions, 103 flow [2024-11-09 10:54:15,517 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-11-09 10:54:15,517 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:54:15,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 38 events. 4/38 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 64 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-11-09 10:54:15,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 41 transitions, 103 flow [2024-11-09 10:54:15,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 37 transitions, 92 flow [2024-11-09 10:54:15,533 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:54:15,541 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;@2f1ac488, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:54:15,541 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2024-11-09 10:54:15,544 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:54:15,545 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:54:15,545 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:54:15,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:15,546 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:54:15,546 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:15,551 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:15,551 INFO L85 PathProgramCache]: Analyzing trace with hash 410499, now seen corresponding path program 1 times [2024-11-09 10:54:15,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:15,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628589344] [2024-11-09 10:54:15,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:15,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:15,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:15,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628589344] [2024-11-09 10:54:15,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628589344] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:15,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:15,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:54:15,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407950297] [2024-11-09 10:54:15,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:15,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:54:15,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:15,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:54:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:54:15,822 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:54:15,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-09 10:54:15,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:15,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:54:15,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:15,926 INFO L124 PetriNetUnfolderBase]: 200/348 cut-off events. [2024-11-09 10:54:15,926 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-09 10:54:15,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 348 events. 200/348 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1191 event pairs, 124 based on Foata normal form. 1/318 useless extension candidates. Maximal degree in co-relation 585. Up to 293 conditions per place. [2024-11-09 10:54:15,932 INFO L140 encePairwiseOnDemand]: 37/41 looper letters, 21 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-09 10:54:15,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 34 transitions, 132 flow [2024-11-09 10:54:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:54:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:54:15,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-09 10:54:15,943 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-11-09 10:54:15,945 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 92 flow. Second operand 3 states and 70 transitions. [2024-11-09 10:54:15,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 34 transitions, 132 flow [2024-11-09 10:54:15,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 120 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:54:15,949 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 78 flow [2024-11-09 10:54:15,950 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-09 10:54:15,952 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -7 predicate places. [2024-11-09 10:54:15,953 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 78 flow [2024-11-09 10:54:15,953 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-09 10:54:15,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:15,953 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:54:15,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:54:15,953 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:15,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:15,954 INFO L85 PathProgramCache]: Analyzing trace with hash 410500, now seen corresponding path program 1 times [2024-11-09 10:54:15,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:15,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132207476] [2024-11-09 10:54:15,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:15,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:16,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:16,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132207476] [2024-11-09 10:54:16,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132207476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:16,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:16,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:54:16,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551917886] [2024-11-09 10:54:16,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:16,188 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:54:16,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:16,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:54:16,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:54:16,210 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:54:16,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-11-09 10:54:16,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:16,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:54:16,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:16,386 INFO L124 PetriNetUnfolderBase]: 201/351 cut-off events. [2024-11-09 10:54:16,386 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:54:16,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 351 events. 201/351 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1200 event pairs, 124 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 647. Up to 298 conditions per place. [2024-11-09 10:54:16,389 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 23 selfloop transitions, 4 changer transitions 0/37 dead transitions. [2024-11-09 10:54:16,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 140 flow [2024-11-09 10:54:16,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:54:16,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:54:16,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-11-09 10:54:16,392 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-11-09 10:54:16,392 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 78 flow. Second operand 4 states and 88 transitions. [2024-11-09 10:54:16,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 140 flow [2024-11-09 10:54:16,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:16,394 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 101 flow [2024-11-09 10:54:16,395 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-09 10:54:16,395 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -4 predicate places. [2024-11-09 10:54:16,395 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 101 flow [2024-11-09 10:54:16,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-11-09 10:54:16,396 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:16,396 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:54:16,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:54:16,396 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:16,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:16,397 INFO L85 PathProgramCache]: Analyzing trace with hash 394503146, now seen corresponding path program 1 times [2024-11-09 10:54:16,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:16,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949646509] [2024-11-09 10:54:16,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:16,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:16,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:16,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:16,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949646509] [2024-11-09 10:54:16,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949646509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:16,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411296919] [2024-11-09 10:54:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:16,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:16,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:16,624 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) [2024-11-09 10:54:16,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:54:16,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:16,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:54:16,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:16,750 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 [2024-11-09 10:54:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:16,916 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:16,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411296919] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:16,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:16,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:54:16,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503157592] [2024-11-09 10:54:16,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:16,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:54:17,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:17,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:54:17,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:54:17,074 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:54:17,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 101 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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) [2024-11-09 10:54:17,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:17,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:54:17,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:17,280 INFO L124 PetriNetUnfolderBase]: 202/353 cut-off events. [2024-11-09 10:54:17,281 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:54:17,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 353 events. 202/353 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1213 event pairs, 124 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 654. Up to 295 conditions per place. [2024-11-09 10:54:17,285 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 19 selfloop transitions, 10 changer transitions 0/39 dead transitions. [2024-11-09 10:54:17,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 167 flow [2024-11-09 10:54:17,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:54:17,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:54:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-11-09 10:54:17,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-11-09 10:54:17,290 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 101 flow. Second operand 8 states and 151 transitions. [2024-11-09 10:54:17,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 167 flow [2024-11-09 10:54:17,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:54:17,293 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 126 flow [2024-11-09 10:54:17,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=126, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2024-11-09 10:54:17,294 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 1 predicate places. [2024-11-09 10:54:17,295 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 126 flow [2024-11-09 10:54:17,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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) [2024-11-09 10:54:17,296 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:17,296 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:54:17,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:54:17,499 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 [2024-11-09 10:54:17,500 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:17,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:17,501 INFO L85 PathProgramCache]: Analyzing trace with hash -653285282, now seen corresponding path program 1 times [2024-11-09 10:54:17,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:17,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875572427] [2024-11-09 10:54:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:17,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:17,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:17,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875572427] [2024-11-09 10:54:17,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875572427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:17,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:17,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:54:17,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794960655] [2024-11-09 10:54:17,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:17,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:54:17,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:17,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:54:17,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:54:17,609 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-11-09 10:54:17,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-11-09 10:54:17,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:17,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-11-09 10:54:17,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:17,727 INFO L124 PetriNetUnfolderBase]: 202/336 cut-off events. [2024-11-09 10:54:17,728 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:54:17,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 676 conditions, 336 events. 202/336 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1042 event pairs, 124 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 638. Up to 294 conditions per place. [2024-11-09 10:54:17,729 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 25 selfloop transitions, 4 changer transitions 0/36 dead transitions. [2024-11-09 10:54:17,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 36 transitions, 178 flow [2024-11-09 10:54:17,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:54:17,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:54:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-11-09 10:54:17,734 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-11-09 10:54:17,734 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 126 flow. Second operand 4 states and 74 transitions. [2024-11-09 10:54:17,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 36 transitions, 178 flow [2024-11-09 10:54:17,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 36 transitions, 136 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-09 10:54:17,735 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 86 flow [2024-11-09 10:54:17,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-09 10:54:17,736 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -6 predicate places. [2024-11-09 10:54:17,736 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 86 flow [2024-11-09 10:54:17,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-11-09 10:54:17,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:17,736 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:54:17,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:54:17,737 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:17,737 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:17,741 INFO L85 PathProgramCache]: Analyzing trace with hash -653285281, now seen corresponding path program 1 times [2024-11-09 10:54:17,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:17,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495057284] [2024-11-09 10:54:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:17,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:17,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:17,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495057284] [2024-11-09 10:54:17,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495057284] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:17,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:17,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:54:17,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576512052] [2024-11-09 10:54:17,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:17,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:54:17,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:17,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:54:17,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:54:17,821 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:54:17,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 86 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:17,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:17,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:54:17,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:17,932 INFO L124 PetriNetUnfolderBase]: 433/716 cut-off events. [2024-11-09 10:54:17,932 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:54:17,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1404 conditions, 716 events. 433/716 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2755 event pairs, 248 based on Foata normal form. 0/682 useless extension candidates. Maximal degree in co-relation 813. Up to 384 conditions per place. [2024-11-09 10:54:17,936 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 54 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2024-11-09 10:54:17,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 65 transitions, 270 flow [2024-11-09 10:54:17,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:54:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:54:17,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-09 10:54:17,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-11-09 10:54:17,940 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 86 flow. Second operand 5 states and 132 transitions. [2024-11-09 10:54:17,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 65 transitions, 270 flow [2024-11-09 10:54:17,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 65 transitions, 265 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:17,942 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 106 flow [2024-11-09 10:54:17,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2024-11-09 10:54:17,942 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2024-11-09 10:54:17,942 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 106 flow [2024-11-09 10:54:17,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:17,943 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:17,943 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:17,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:54:17,943 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:17,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:17,945 INFO L85 PathProgramCache]: Analyzing trace with hash -751478171, now seen corresponding path program 1 times [2024-11-09 10:54:17,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:17,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096887014] [2024-11-09 10:54:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:17,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:17,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:18,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:18,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096887014] [2024-11-09 10:54:18,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096887014] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:18,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:18,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:54:18,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790601945] [2024-11-09 10:54:18,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:18,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:54:18,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:18,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:54:18,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:54:18,028 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:54:18,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-11-09 10:54:18,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:18,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:54:18,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:18,136 INFO L124 PetriNetUnfolderBase]: 410/680 cut-off events. [2024-11-09 10:54:18,136 INFO L125 PetriNetUnfolderBase]: For 222/253 co-relation queries the response was YES. [2024-11-09 10:54:18,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1523 conditions, 680 events. 410/680 cut-off events. For 222/253 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2583 event pairs, 248 based on Foata normal form. 0/644 useless extension candidates. Maximal degree in co-relation 900. Up to 389 conditions per place. [2024-11-09 10:54:18,140 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 51 selfloop transitions, 5 changer transitions 0/62 dead transitions. [2024-11-09 10:54:18,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 62 transitions, 282 flow [2024-11-09 10:54:18,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:54:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:54:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-09 10:54:18,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-11-09 10:54:18,141 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 106 flow. Second operand 5 states and 129 transitions. [2024-11-09 10:54:18,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 62 transitions, 282 flow [2024-11-09 10:54:18,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 62 transitions, 277 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:18,144 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 126 flow [2024-11-09 10:54:18,144 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-09 10:54:18,145 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 2 predicate places. [2024-11-09 10:54:18,146 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 126 flow [2024-11-09 10:54:18,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-11-09 10:54:18,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:18,146 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:18,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:54:18,146 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:18,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:18,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1615111737, now seen corresponding path program 1 times [2024-11-09 10:54:18,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:18,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976719627] [2024-11-09 10:54:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:18,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:18,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:18,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:18,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976719627] [2024-11-09 10:54:18,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976719627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:18,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262354505] [2024-11-09 10:54:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:18,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:18,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:18,290 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) [2024-11-09 10:54:18,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:54:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:18,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:54:18,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:18,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:18,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:18,446 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 [2024-11-09 10:54:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:18,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262354505] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:18,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:18,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-09 10:54:18,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825671042] [2024-11-09 10:54:18,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:18,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:54:18,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:18,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:54:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:54:18,589 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:54:18,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 126 flow. Second operand has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 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) [2024-11-09 10:54:18,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:18,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:54:18,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:18,821 INFO L124 PetriNetUnfolderBase]: 491/823 cut-off events. [2024-11-09 10:54:18,821 INFO L125 PetriNetUnfolderBase]: For 418/470 co-relation queries the response was YES. [2024-11-09 10:54:18,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 823 events. 491/823 cut-off events. For 418/470 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3411 event pairs, 293 based on Foata normal form. 0/781 useless extension candidates. Maximal degree in co-relation 1278. Up to 404 conditions per place. [2024-11-09 10:54:18,825 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 52 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-11-09 10:54:18,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 312 flow [2024-11-09 10:54:18,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:54:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:54:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-11-09 10:54:18,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-11-09 10:54:18,826 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 126 flow. Second operand 6 states and 148 transitions. [2024-11-09 10:54:18,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 312 flow [2024-11-09 10:54:18,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 307 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:18,828 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 152 flow [2024-11-09 10:54:18,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=152, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-11-09 10:54:18,829 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-11-09 10:54:18,829 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 152 flow [2024-11-09 10:54:18,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.454545454545453) internal successors, (181), 11 states have internal predecessors, (181), 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) [2024-11-09 10:54:18,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:18,830 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:18,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:19,033 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 [2024-11-09 10:54:19,034 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:19,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash -621989837, now seen corresponding path program 1 times [2024-11-09 10:54:19,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:19,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322693663] [2024-11-09 10:54:19,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:19,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:19,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:19,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:19,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322693663] [2024-11-09 10:54:19,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322693663] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:19,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:19,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:54:19,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217280951] [2024-11-09 10:54:19,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:19,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:54:19,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:19,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:54:19,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:54:19,092 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:54:19,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:19,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:19,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:54:19,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:19,211 INFO L124 PetriNetUnfolderBase]: 483/777 cut-off events. [2024-11-09 10:54:19,212 INFO L125 PetriNetUnfolderBase]: For 923/1094 co-relation queries the response was YES. [2024-11-09 10:54:19,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2188 conditions, 777 events. 483/777 cut-off events. For 923/1094 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2974 event pairs, 306 based on Foata normal form. 0/743 useless extension candidates. Maximal degree in co-relation 1492. Up to 511 conditions per place. [2024-11-09 10:54:19,216 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 50 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-11-09 10:54:19,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 324 flow [2024-11-09 10:54:19,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:54:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:54:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-11-09 10:54:19,217 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-11-09 10:54:19,217 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 152 flow. Second operand 5 states and 126 transitions. [2024-11-09 10:54:19,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 324 flow [2024-11-09 10:54:19,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 61 transitions, 309 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:19,219 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 164 flow [2024-11-09 10:54:19,220 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-11-09 10:54:19,220 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-11-09 10:54:19,220 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 164 flow [2024-11-09 10:54:19,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:54:19,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:19,221 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:19,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:54:19,221 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:19,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:19,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1629637055, now seen corresponding path program 1 times [2024-11-09 10:54:19,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:19,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776792014] [2024-11-09 10:54:19,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:19,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:19,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:19,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776792014] [2024-11-09 10:54:19,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776792014] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:19,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666163947] [2024-11-09 10:54:19,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:19,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:19,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:19,342 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) [2024-11-09 10:54:19,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:54:19,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:19,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:54:19,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:19,451 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:19,484 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 [2024-11-09 10:54:19,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:19,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666163947] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:19,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:19,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-09 10:54:19,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330834799] [2024-11-09 10:54:19,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:19,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:54:19,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:19,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:54:19,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:54:19,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:54:19,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 164 flow. Second operand has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 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) [2024-11-09 10:54:19,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:19,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:54:19,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:19,979 INFO L124 PetriNetUnfolderBase]: 625/1028 cut-off events. [2024-11-09 10:54:19,979 INFO L125 PetriNetUnfolderBase]: For 1053/1271 co-relation queries the response was YES. [2024-11-09 10:54:19,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2928 conditions, 1028 events. 625/1028 cut-off events. For 1053/1271 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4488 event pairs, 358 based on Foata normal form. 0/985 useless extension candidates. Maximal degree in co-relation 2185. Up to 564 conditions per place. [2024-11-09 10:54:19,985 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 54 selfloop transitions, 8 changer transitions 0/68 dead transitions. [2024-11-09 10:54:19,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 367 flow [2024-11-09 10:54:19,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:54:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:54:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-11-09 10:54:19,988 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-11-09 10:54:19,988 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 164 flow. Second operand 6 states and 146 transitions. [2024-11-09 10:54:19,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 367 flow [2024-11-09 10:54:19,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 68 transitions, 362 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:19,991 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 190 flow [2024-11-09 10:54:19,992 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2024-11-09 10:54:19,993 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-11-09 10:54:19,993 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 190 flow [2024-11-09 10:54:19,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.818181818181817) internal successors, (185), 11 states have internal predecessors, (185), 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) [2024-11-09 10:54:19,993 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:19,993 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:20,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:54:20,197 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:20,198 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:20,198 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:20,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1639198813, now seen corresponding path program 1 times [2024-11-09 10:54:20,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:20,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542128631] [2024-11-09 10:54:20,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:20,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:20,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:20,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542128631] [2024-11-09 10:54:20,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542128631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:20,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90906447] [2024-11-09 10:54:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:20,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:20,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:20,284 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) [2024-11-09 10:54:20,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:54:20,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:20,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:54:20,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:20,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:20,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90906447] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:20,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:20,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-09 10:54:20,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833018305] [2024-11-09 10:54:20,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:20,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:54:20,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:20,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:54:20,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:54:20,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:54:20,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 190 flow. Second operand has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 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) [2024-11-09 10:54:20,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:20,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:54:20,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:20,781 INFO L124 PetriNetUnfolderBase]: 1167/1863 cut-off events. [2024-11-09 10:54:20,781 INFO L125 PetriNetUnfolderBase]: For 2238/2543 co-relation queries the response was YES. [2024-11-09 10:54:20,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5842 conditions, 1863 events. 1167/1863 cut-off events. For 2238/2543 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8857 event pairs, 547 based on Foata normal form. 34/1893 useless extension candidates. Maximal degree in co-relation 3771. Up to 806 conditions per place. [2024-11-09 10:54:20,792 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 80 selfloop transitions, 13 changer transitions 0/99 dead transitions. [2024-11-09 10:54:20,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 99 transitions, 594 flow [2024-11-09 10:54:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:54:20,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:54:20,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-11-09 10:54:20,793 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-11-09 10:54:20,793 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 190 flow. Second operand 8 states and 194 transitions. [2024-11-09 10:54:20,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 99 transitions, 594 flow [2024-11-09 10:54:20,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 573 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:20,797 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 250 flow [2024-11-09 10:54:20,797 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=250, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2024-11-09 10:54:20,798 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-11-09 10:54:20,798 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 250 flow [2024-11-09 10:54:20,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.714285714285715) internal successors, (234), 14 states have internal predecessors, (234), 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) [2024-11-09 10:54:20,798 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:20,798 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:20,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:21,001 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 [2024-11-09 10:54:21,001 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:21,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:21,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1587826419, now seen corresponding path program 1 times [2024-11-09 10:54:21,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:21,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103641808] [2024-11-09 10:54:21,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:21,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:21,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:21,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103641808] [2024-11-09 10:54:21,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103641808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:21,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410829169] [2024-11-09 10:54:21,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:21,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:21,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:21,229 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) [2024-11-09 10:54:21,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:54:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:21,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:54:21,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:21,398 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:54:21,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410829169] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:21,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:54:21,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-09 10:54:21,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813603321] [2024-11-09 10:54:21,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:21,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:54:21,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:21,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:54:21,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:54:21,476 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-09 10:54:21,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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) [2024-11-09 10:54:21,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:21,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-09 10:54:21,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:21,709 INFO L124 PetriNetUnfolderBase]: 1113/1703 cut-off events. [2024-11-09 10:54:21,709 INFO L125 PetriNetUnfolderBase]: For 4398/4878 co-relation queries the response was YES. [2024-11-09 10:54:21,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6102 conditions, 1703 events. 1113/1703 cut-off events. For 4398/4878 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7601 event pairs, 409 based on Foata normal form. 0/1620 useless extension candidates. Maximal degree in co-relation 4222. Up to 896 conditions per place. [2024-11-09 10:54:21,720 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 72 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-11-09 10:54:21,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 87 transitions, 658 flow [2024-11-09 10:54:21,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:54:21,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:54:21,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-11-09 10:54:21,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-11-09 10:54:21,721 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 250 flow. Second operand 6 states and 127 transitions. [2024-11-09 10:54:21,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 87 transitions, 658 flow [2024-11-09 10:54:21,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 634 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:21,726 INFO L231 Difference]: Finished difference. Result has 61 places, 49 transitions, 252 flow [2024-11-09 10:54:21,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=61, PETRI_TRANSITIONS=49} [2024-11-09 10:54:21,727 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-11-09 10:54:21,727 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 49 transitions, 252 flow [2024-11-09 10:54:21,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 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) [2024-11-09 10:54:21,727 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:21,727 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:21,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:54:21,931 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 [2024-11-09 10:54:21,931 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:21,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:21,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1581839581, now seen corresponding path program 1 times [2024-11-09 10:54:21,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:21,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920954343] [2024-11-09 10:54:21,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:21,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:21,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:22,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:22,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920954343] [2024-11-09 10:54:22,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920954343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:22,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365160359] [2024-11-09 10:54:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:22,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:22,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:22,046 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) [2024-11-09 10:54:22,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:54:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:22,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 10:54:22,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:22,206 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:22,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365160359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:22,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:22,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-09 10:54:22,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665978611] [2024-11-09 10:54:22,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:22,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:54:22,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:22,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:54:22,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:54:22,313 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:54:22,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 49 transitions, 252 flow. Second operand has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 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) [2024-11-09 10:54:22,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:22,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:54:22,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:22,619 INFO L124 PetriNetUnfolderBase]: 1136/1733 cut-off events. [2024-11-09 10:54:22,620 INFO L125 PetriNetUnfolderBase]: For 4695/5195 co-relation queries the response was YES. [2024-11-09 10:54:22,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6452 conditions, 1733 events. 1136/1733 cut-off events. For 4695/5195 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7482 event pairs, 544 based on Foata normal form. 35/1765 useless extension candidates. Maximal degree in co-relation 4569. Up to 816 conditions per place. [2024-11-09 10:54:22,632 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 75 selfloop transitions, 13 changer transitions 0/93 dead transitions. [2024-11-09 10:54:22,633 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 93 transitions, 653 flow [2024-11-09 10:54:22,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:54:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:54:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-11-09 10:54:22,634 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-11-09 10:54:22,634 INFO L175 Difference]: Start difference. First operand has 61 places, 49 transitions, 252 flow. Second operand 8 states and 192 transitions. [2024-11-09 10:54:22,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 93 transitions, 653 flow [2024-11-09 10:54:22,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 93 transitions, 611 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-09 10:54:22,639 INFO L231 Difference]: Finished difference. Result has 66 places, 53 transitions, 305 flow [2024-11-09 10:54:22,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=305, PETRI_PLACES=66, PETRI_TRANSITIONS=53} [2024-11-09 10:54:22,639 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-11-09 10:54:22,639 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 53 transitions, 305 flow [2024-11-09 10:54:22,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.933333333333334) internal successors, (254), 15 states have internal predecessors, (254), 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) [2024-11-09 10:54:22,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:22,640 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:22,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:22,844 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 [2024-11-09 10:54:22,845 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:22,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:22,846 INFO L85 PathProgramCache]: Analyzing trace with hash 673362231, now seen corresponding path program 2 times [2024-11-09 10:54:22,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:22,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633028295] [2024-11-09 10:54:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:22,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:22,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:23,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:23,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:23,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633028295] [2024-11-09 10:54:23,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633028295] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:23,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45803748] [2024-11-09 10:54:23,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:23,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:23,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:23,009 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) [2024-11-09 10:54:23,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:54:23,061 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:23,061 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:23,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 10:54:23,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:23,069 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 [2024-11-09 10:54:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:23,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:54:23,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45803748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:23,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:23,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-09 10:54:23,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667732789] [2024-11-09 10:54:23,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:23,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:54:23,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:23,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:54:23,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:54:23,812 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-09 10:54:23,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 53 transitions, 305 flow. Second operand has 18 states, 18 states have (on average 15.777777777777779) internal successors, (284), 18 states have internal predecessors, (284), 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) [2024-11-09 10:54:23,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:23,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-09 10:54:23,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:24,778 INFO L124 PetriNetUnfolderBase]: 1326/2004 cut-off events. [2024-11-09 10:54:24,778 INFO L125 PetriNetUnfolderBase]: For 5054/5460 co-relation queries the response was YES. [2024-11-09 10:54:24,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7735 conditions, 2004 events. 1326/2004 cut-off events. For 5054/5460 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8849 event pairs, 285 based on Foata normal form. 0/2000 useless extension candidates. Maximal degree in co-relation 5231. Up to 428 conditions per place. [2024-11-09 10:54:24,792 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 141 selfloop transitions, 20 changer transitions 0/165 dead transitions. [2024-11-09 10:54:24,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 165 transitions, 1137 flow [2024-11-09 10:54:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:54:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:54:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 334 transitions. [2024-11-09 10:54:24,794 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-11-09 10:54:24,794 INFO L175 Difference]: Start difference. First operand has 66 places, 53 transitions, 305 flow. Second operand 14 states and 334 transitions. [2024-11-09 10:54:24,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 165 transitions, 1137 flow [2024-11-09 10:54:24,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 165 transitions, 1109 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:24,801 INFO L231 Difference]: Finished difference. Result has 76 places, 55 transitions, 357 flow [2024-11-09 10:54:24,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=357, PETRI_PLACES=76, PETRI_TRANSITIONS=55} [2024-11-09 10:54:24,801 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-11-09 10:54:24,802 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 55 transitions, 357 flow [2024-11-09 10:54:24,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.777777777777779) internal successors, (284), 18 states have internal predecessors, (284), 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) [2024-11-09 10:54:24,802 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:24,802 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:24,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:54:25,006 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 [2024-11-09 10:54:25,007 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:25,007 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash -2037858947, now seen corresponding path program 2 times [2024-11-09 10:54:25,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:25,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606505617] [2024-11-09 10:54:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:25,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:54:25,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:25,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606505617] [2024-11-09 10:54:25,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606505617] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:25,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812427716] [2024-11-09 10:54:25,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:25,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:25,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:25,178 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) [2024-11-09 10:54:25,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:54:25,232 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:25,232 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:25,233 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:54:25,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:25,343 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:25,443 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 [2024-11-09 10:54:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:25,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812427716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:25,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:25,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-09 10:54:25,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177819908] [2024-11-09 10:54:25,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:25,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:54:25,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:25,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:54:25,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:54:25,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-09 10:54:25,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 55 transitions, 357 flow. Second operand has 20 states, 20 states have (on average 16.05) internal successors, (321), 20 states have internal predecessors, (321), 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) [2024-11-09 10:54:25,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:25,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-09 10:54:25,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:26,850 INFO L124 PetriNetUnfolderBase]: 1770/2590 cut-off events. [2024-11-09 10:54:26,851 INFO L125 PetriNetUnfolderBase]: For 10016/10527 co-relation queries the response was YES. [2024-11-09 10:54:26,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10595 conditions, 2590 events. 1770/2590 cut-off events. For 10016/10527 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11166 event pairs, 349 based on Foata normal form. 0/2585 useless extension candidates. Maximal degree in co-relation 7074. Up to 476 conditions per place. [2024-11-09 10:54:26,896 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 24 changer transitions 0/163 dead transitions. [2024-11-09 10:54:26,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 163 transitions, 1291 flow [2024-11-09 10:54:26,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:54:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:54:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 327 transitions. [2024-11-09 10:54:26,897 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5696864111498258 [2024-11-09 10:54:26,897 INFO L175 Difference]: Start difference. First operand has 76 places, 55 transitions, 357 flow. Second operand 14 states and 327 transitions. [2024-11-09 10:54:26,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 163 transitions, 1291 flow [2024-11-09 10:54:26,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 163 transitions, 1093 flow, removed 43 selfloop flow, removed 10 redundant places. [2024-11-09 10:54:26,919 INFO L231 Difference]: Finished difference. Result has 80 places, 61 transitions, 401 flow [2024-11-09 10:54:26,919 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=290, 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=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=401, PETRI_PLACES=80, PETRI_TRANSITIONS=61} [2024-11-09 10:54:26,919 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-11-09 10:54:26,919 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 61 transitions, 401 flow [2024-11-09 10:54:26,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 16.05) internal successors, (321), 20 states have internal predecessors, (321), 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) [2024-11-09 10:54:26,920 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:26,920 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:26,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:27,120 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 [2024-11-09 10:54:27,120 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:27,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:27,121 INFO L85 PathProgramCache]: Analyzing trace with hash -194226030, now seen corresponding path program 1 times [2024-11-09 10:54:27,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:27,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38937045] [2024-11-09 10:54:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:27,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:27,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:27,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:27,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38937045] [2024-11-09 10:54:27,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38937045] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:54:27,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:54:27,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:54:27,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846610148] [2024-11-09 10:54:27,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:27,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:54:27,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:27,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:54:27,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:54:27,320 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-11-09 10:54:27,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 61 transitions, 401 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) [2024-11-09 10:54:27,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:27,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-11-09 10:54:27,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:27,523 INFO L124 PetriNetUnfolderBase]: 1761/2791 cut-off events. [2024-11-09 10:54:27,523 INFO L125 PetriNetUnfolderBase]: For 9739/10124 co-relation queries the response was YES. [2024-11-09 10:54:27,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11576 conditions, 2791 events. 1761/2791 cut-off events. For 9739/10124 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 13477 event pairs, 439 based on Foata normal form. 18/2777 useless extension candidates. Maximal degree in co-relation 8341. Up to 1811 conditions per place. [2024-11-09 10:54:27,537 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 62 selfloop transitions, 8 changer transitions 8/86 dead transitions. [2024-11-09 10:54:27,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 86 transitions, 716 flow [2024-11-09 10:54:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:54:27,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:54:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-11-09 10:54:27,538 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7235772357723578 [2024-11-09 10:54:27,538 INFO L175 Difference]: Start difference. First operand has 80 places, 61 transitions, 401 flow. Second operand 3 states and 89 transitions. [2024-11-09 10:54:27,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 86 transitions, 716 flow [2024-11-09 10:54:27,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 86 transitions, 623 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-11-09 10:54:27,545 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 365 flow [2024-11-09 10:54:27,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=365, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-11-09 10:54:27,546 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-11-09 10:54:27,546 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 365 flow [2024-11-09 10:54:27,546 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) [2024-11-09 10:54:27,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:27,546 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] [2024-11-09 10:54:27,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:54:27,546 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:27,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:27,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1458239330, now seen corresponding path program 1 times [2024-11-09 10:54:27,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:27,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434536581] [2024-11-09 10:54:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:27,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:27,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:27,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:27,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434536581] [2024-11-09 10:54:27,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434536581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:27,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135216602] [2024-11-09 10:54:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:27,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:27,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:27,602 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) [2024-11-09 10:54:27,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:54:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:27,663 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:54:27,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:27,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:27,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135216602] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:27,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:54:27,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-09 10:54:27,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947289664] [2024-11-09 10:54:27,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:27,712 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:54:27,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:27,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:54:27,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:54:27,726 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:54:27,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 61 transitions, 365 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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) [2024-11-09 10:54:27,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:27,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:54:27,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:27,894 INFO L124 PetriNetUnfolderBase]: 1851/2787 cut-off events. [2024-11-09 10:54:27,895 INFO L125 PetriNetUnfolderBase]: For 7555/7949 co-relation queries the response was YES. [2024-11-09 10:54:27,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10640 conditions, 2787 events. 1851/2787 cut-off events. For 7555/7949 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 13321 event pairs, 713 based on Foata normal form. 151/2836 useless extension candidates. Maximal degree in co-relation 6895. Up to 1574 conditions per place. [2024-11-09 10:54:27,913 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 67 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-11-09 10:54:27,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 85 transitions, 668 flow [2024-11-09 10:54:27,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:54:27,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:54:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-09 10:54:27,915 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-11-09 10:54:27,915 INFO L175 Difference]: Start difference. First operand has 73 places, 61 transitions, 365 flow. Second operand 5 states and 113 transitions. [2024-11-09 10:54:27,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 85 transitions, 668 flow [2024-11-09 10:54:27,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 560 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-11-09 10:54:27,926 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 324 flow [2024-11-09 10:54:27,926 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=324, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-11-09 10:54:27,927 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-11-09 10:54:27,927 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 324 flow [2024-11-09 10:54:27,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 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) [2024-11-09 10:54:27,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:27,927 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] [2024-11-09 10:54:27,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:28,130 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 [2024-11-09 10:54:28,131 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:28,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:28,132 INFO L85 PathProgramCache]: Analyzing trace with hash -934982250, now seen corresponding path program 1 times [2024-11-09 10:54:28,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:28,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835044538] [2024-11-09 10:54:28,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:28,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:28,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:28,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:28,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835044538] [2024-11-09 10:54:28,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835044538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:28,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441171600] [2024-11-09 10:54:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:28,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:28,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:28,250 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) [2024-11-09 10:54:28,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:54:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:28,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:54:28,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:28,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:28,390 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:28,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:28,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441171600] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:28,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:28,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2024-11-09 10:54:28,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508218480] [2024-11-09 10:54:28,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:28,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:54:28,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:28,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:54:28,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:54:28,507 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-09 10:54:28,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 324 flow. Second operand has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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) [2024-11-09 10:54:28,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:28,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-09 10:54:28,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:28,917 INFO L124 PetriNetUnfolderBase]: 2401/3541 cut-off events. [2024-11-09 10:54:28,917 INFO L125 PetriNetUnfolderBase]: For 7424/7717 co-relation queries the response was YES. [2024-11-09 10:54:28,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11817 conditions, 3541 events. 2401/3541 cut-off events. For 7424/7717 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 17177 event pairs, 714 based on Foata normal form. 0/3185 useless extension candidates. Maximal degree in co-relation 7723. Up to 1498 conditions per place. [2024-11-09 10:54:28,941 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 132 selfloop transitions, 37 changer transitions 0/174 dead transitions. [2024-11-09 10:54:28,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 174 transitions, 1368 flow [2024-11-09 10:54:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 10:54:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-09 10:54:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-11-09 10:54:28,946 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-11-09 10:54:28,946 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 324 flow. Second operand 12 states and 256 transitions. [2024-11-09 10:54:28,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 174 transitions, 1368 flow [2024-11-09 10:54:28,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 174 transitions, 1306 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-09 10:54:28,958 INFO L231 Difference]: Finished difference. Result has 73 places, 79 transitions, 488 flow [2024-11-09 10:54:28,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=488, PETRI_PLACES=73, PETRI_TRANSITIONS=79} [2024-11-09 10:54:28,959 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-11-09 10:54:28,959 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 79 transitions, 488 flow [2024-11-09 10:54:28,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.571428571428573) internal successors, (232), 14 states have internal predecessors, (232), 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) [2024-11-09 10:54:28,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:28,959 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] [2024-11-09 10:54:28,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 10:54:29,160 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 [2024-11-09 10:54:29,160 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:29,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:29,160 INFO L85 PathProgramCache]: Analyzing trace with hash 463335020, now seen corresponding path program 2 times [2024-11-09 10:54:29,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:29,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44138175] [2024-11-09 10:54:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:29,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:29,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:29,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44138175] [2024-11-09 10:54:29,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44138175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:29,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037664199] [2024-11-09 10:54:29,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:29,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:29,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:29,302 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) [2024-11-09 10:54:29,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:54:29,361 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:29,362 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:29,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:54:29,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:29,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:29,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037664199] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:29,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:54:29,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 13 [2024-11-09 10:54:29,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784012316] [2024-11-09 10:54:29,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:29,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:54:29,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:29,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:54:29,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:54:29,526 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-09 10:54:29,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 79 transitions, 488 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2024-11-09 10:54:29,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:29,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-09 10:54:29,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:29,885 INFO L124 PetriNetUnfolderBase]: 3142/4644 cut-off events. [2024-11-09 10:54:29,885 INFO L125 PetriNetUnfolderBase]: For 10298/10694 co-relation queries the response was YES. [2024-11-09 10:54:29,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16805 conditions, 4644 events. 3142/4644 cut-off events. For 10298/10694 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 24031 event pairs, 782 based on Foata normal form. 28/4572 useless extension candidates. Maximal degree in co-relation 12775. Up to 1683 conditions per place. [2024-11-09 10:54:29,909 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 135 selfloop transitions, 58 changer transitions 0/198 dead transitions. [2024-11-09 10:54:29,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 198 transitions, 1630 flow [2024-11-09 10:54:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:54:29,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:54:29,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-11-09 10:54:29,910 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-11-09 10:54:29,910 INFO L175 Difference]: Start difference. First operand has 73 places, 79 transitions, 488 flow. Second operand 9 states and 201 transitions. [2024-11-09 10:54:29,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 198 transitions, 1630 flow [2024-11-09 10:54:29,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 198 transitions, 1622 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:29,925 INFO L231 Difference]: Finished difference. Result has 83 places, 112 transitions, 944 flow [2024-11-09 10:54:29,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=944, PETRI_PLACES=83, PETRI_TRANSITIONS=112} [2024-11-09 10:54:29,925 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-11-09 10:54:29,925 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 112 transitions, 944 flow [2024-11-09 10:54:29,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2024-11-09 10:54:29,926 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:29,926 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] [2024-11-09 10:54:29,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:54:30,129 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 [2024-11-09 10:54:30,129 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:30,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:30,130 INFO L85 PathProgramCache]: Analyzing trace with hash -586453984, now seen corresponding path program 3 times [2024-11-09 10:54:30,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:30,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244041017] [2024-11-09 10:54:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:30,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:30,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:30,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244041017] [2024-11-09 10:54:30,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244041017] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:30,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780416652] [2024-11-09 10:54:30,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:54:30,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:30,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:30,205 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) [2024-11-09 10:54:30,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:54:30,276 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:54:30,277 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:30,279 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:54:30,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:30,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:30,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:30,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780416652] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:30,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:30,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2024-11-09 10:54:30,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171551381] [2024-11-09 10:54:30,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:30,402 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:54:30,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:30,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:54:30,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:54:30,478 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-09 10:54:30,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 112 transitions, 944 flow. Second operand has 15 states, 15 states have (on average 16.8) internal successors, (252), 15 states have internal predecessors, (252), 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) [2024-11-09 10:54:30,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:30,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-09 10:54:30,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:31,188 INFO L124 PetriNetUnfolderBase]: 4157/6116 cut-off events. [2024-11-09 10:54:31,189 INFO L125 PetriNetUnfolderBase]: For 23240/23770 co-relation queries the response was YES. [2024-11-09 10:54:31,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28109 conditions, 6116 events. 4157/6116 cut-off events. For 23240/23770 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 32574 event pairs, 1108 based on Foata normal form. 26/6137 useless extension candidates. Maximal degree in co-relation 21938. Up to 2730 conditions per place. [2024-11-09 10:54:31,218 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 171 selfloop transitions, 125 changer transitions 0/301 dead transitions. [2024-11-09 10:54:31,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 301 transitions, 3005 flow [2024-11-09 10:54:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 10:54:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-09 10:54:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 330 transitions. [2024-11-09 10:54:31,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-11-09 10:54:31,220 INFO L175 Difference]: Start difference. First operand has 83 places, 112 transitions, 944 flow. Second operand 15 states and 330 transitions. [2024-11-09 10:54:31,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 301 transitions, 3005 flow [2024-11-09 10:54:31,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 301 transitions, 2982 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-11-09 10:54:31,296 INFO L231 Difference]: Finished difference. Result has 102 places, 177 transitions, 2066 flow [2024-11-09 10:54:31,296 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=933, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2066, PETRI_PLACES=102, PETRI_TRANSITIONS=177} [2024-11-09 10:54:31,297 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-11-09 10:54:31,297 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 177 transitions, 2066 flow [2024-11-09 10:54:31,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.8) internal successors, (252), 15 states have internal predecessors, (252), 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) [2024-11-09 10:54:31,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:31,297 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:31,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:31,497 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 [2024-11-09 10:54:31,498 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:31,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:31,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1548411352, now seen corresponding path program 4 times [2024-11-09 10:54:31,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:31,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940077798] [2024-11-09 10:54:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:31,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:31,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:31,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:31,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940077798] [2024-11-09 10:54:31,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940077798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:31,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648424768] [2024-11-09 10:54:31,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:54:31,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:31,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:31,575 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) [2024-11-09 10:54:31,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:54:31,634 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:54:31,634 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:31,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:54:31,635 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:31,682 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:31,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648424768] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:31,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:31,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-09 10:54:31,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356808996] [2024-11-09 10:54:31,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:31,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:54:31,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:31,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:54:31,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:54:31,792 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-11-09 10:54:31,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 177 transitions, 2066 flow. Second operand has 14 states, 14 states have (on average 15.642857142857142) internal successors, (219), 14 states have internal predecessors, (219), 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) [2024-11-09 10:54:31,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:31,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-11-09 10:54:31,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:33,075 INFO L124 PetriNetUnfolderBase]: 6145/8860 cut-off events. [2024-11-09 10:54:33,075 INFO L125 PetriNetUnfolderBase]: For 47653/47653 co-relation queries the response was YES. [2024-11-09 10:54:33,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48545 conditions, 8860 events. 6145/8860 cut-off events. For 47653/47653 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 45700 event pairs, 489 based on Foata normal form. 32/8892 useless extension candidates. Maximal degree in co-relation 43418. Up to 1876 conditions per place. [2024-11-09 10:54:33,135 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 326 selfloop transitions, 296 changer transitions 0/623 dead transitions. [2024-11-09 10:54:33,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 623 transitions, 7708 flow [2024-11-09 10:54:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 10:54:33,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-09 10:54:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 544 transitions. [2024-11-09 10:54:33,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5103189493433395 [2024-11-09 10:54:33,141 INFO L175 Difference]: Start difference. First operand has 102 places, 177 transitions, 2066 flow. Second operand 26 states and 544 transitions. [2024-11-09 10:54:33,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 623 transitions, 7708 flow [2024-11-09 10:54:33,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 623 transitions, 7344 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-11-09 10:54:33,414 INFO L231 Difference]: Finished difference. Result has 131 places, 388 transitions, 5223 flow [2024-11-09 10:54:33,414 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5223, PETRI_PLACES=131, PETRI_TRANSITIONS=388} [2024-11-09 10:54:33,415 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-11-09 10:54:33,415 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 388 transitions, 5223 flow [2024-11-09 10:54:33,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.642857142857142) internal successors, (219), 14 states have internal predecessors, (219), 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) [2024-11-09 10:54:33,415 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:33,415 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] [2024-11-09 10:54:33,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 10:54:33,615 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,SelfDestructingSolverStorable19 [2024-11-09 10:54:33,615 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:33,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:33,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1826264120, now seen corresponding path program 5 times [2024-11-09 10:54:33,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:33,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255854308] [2024-11-09 10:54:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:33,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:33,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:33,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255854308] [2024-11-09 10:54:33,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255854308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:33,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543187425] [2024-11-09 10:54:33,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:54:33,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:33,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:33,733 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) [2024-11-09 10:54:33,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:54:33,789 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:33,790 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:33,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 10:54:33,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:33,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:33,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:33,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543187425] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:33,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:33,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-09 10:54:33,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511748382] [2024-11-09 10:54:33,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:33,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:54:33,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:33,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:54:33,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:54:33,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-11-09 10:54:33,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 388 transitions, 5223 flow. Second operand has 15 states, 15 states have (on average 15.933333333333334) internal successors, (239), 15 states have internal predecessors, (239), 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) [2024-11-09 10:54:33,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:33,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-11-09 10:54:33,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:35,612 INFO L124 PetriNetUnfolderBase]: 6796/9760 cut-off events. [2024-11-09 10:54:35,613 INFO L125 PetriNetUnfolderBase]: For 63291/63291 co-relation queries the response was YES. [2024-11-09 10:54:35,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59188 conditions, 9760 events. 6796/9760 cut-off events. For 63291/63291 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 50576 event pairs, 634 based on Foata normal form. 34/9794 useless extension candidates. Maximal degree in co-relation 57533. Up to 2407 conditions per place. [2024-11-09 10:54:35,694 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 224 selfloop transitions, 502 changer transitions 0/727 dead transitions. [2024-11-09 10:54:35,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 727 transitions, 9873 flow [2024-11-09 10:54:35,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 10:54:35,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-09 10:54:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 468 transitions. [2024-11-09 10:54:35,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-11-09 10:54:35,700 INFO L175 Difference]: Start difference. First operand has 131 places, 388 transitions, 5223 flow. Second operand 22 states and 468 transitions. [2024-11-09 10:54:35,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 727 transitions, 9873 flow [2024-11-09 10:54:36,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 727 transitions, 9570 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-11-09 10:54:36,282 INFO L231 Difference]: Finished difference. Result has 153 places, 606 transitions, 8872 flow [2024-11-09 10:54:36,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4931, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=8872, PETRI_PLACES=153, PETRI_TRANSITIONS=606} [2024-11-09 10:54:36,283 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-11-09 10:54:36,283 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 606 transitions, 8872 flow [2024-11-09 10:54:36,283 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 15.933333333333334) internal successors, (239), 15 states have internal predecessors, (239), 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) [2024-11-09 10:54:36,283 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:36,283 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] [2024-11-09 10:54:36,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 10:54:36,484 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:36,484 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:36,485 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash 164176238, now seen corresponding path program 6 times [2024-11-09 10:54:36,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:36,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378963266] [2024-11-09 10:54:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:36,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:36,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378963266] [2024-11-09 10:54:36,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378963266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:36,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103782526] [2024-11-09 10:54:36,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:54:36,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:36,596 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) [2024-11-09 10:54:36,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 10:54:36,661 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-09 10:54:36,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:36,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:54:36,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:36,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:36,731 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:36,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103782526] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:36,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:54:36,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 15 [2024-11-09 10:54:36,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882272424] [2024-11-09 10:54:36,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:54:36,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:54:36,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:36,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:54:36,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:54:36,820 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-09 10:54:36,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 606 transitions, 8872 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2024-11-09 10:54:36,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:36,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-09 10:54:36,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:38,145 INFO L124 PetriNetUnfolderBase]: 5101/7487 cut-off events. [2024-11-09 10:54:38,145 INFO L125 PetriNetUnfolderBase]: For 61439/62028 co-relation queries the response was YES. [2024-11-09 10:54:38,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49701 conditions, 7487 events. 5101/7487 cut-off events. For 61439/62028 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 40792 event pairs, 564 based on Foata normal form. 28/7511 useless extension candidates. Maximal degree in co-relation 48332. Up to 2240 conditions per place. [2024-11-09 10:54:38,219 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 362 selfloop transitions, 294 changer transitions 0/661 dead transitions. [2024-11-09 10:54:38,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 661 transitions, 10556 flow [2024-11-09 10:54:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:54:38,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:54:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-11-09 10:54:38,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-11-09 10:54:38,221 INFO L175 Difference]: Start difference. First operand has 153 places, 606 transitions, 8872 flow. Second operand 8 states and 184 transitions. [2024-11-09 10:54:38,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 661 transitions, 10556 flow [2024-11-09 10:54:38,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 661 transitions, 10225 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-11-09 10:54:38,842 INFO L231 Difference]: Finished difference. Result has 156 places, 602 transitions, 9173 flow [2024-11-09 10:54:38,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8431, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=292, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9173, PETRI_PLACES=156, PETRI_TRANSITIONS=602} [2024-11-09 10:54:38,843 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-11-09 10:54:38,843 INFO L471 AbstractCegarLoop]: Abstraction has has 156 places, 602 transitions, 9173 flow [2024-11-09 10:54:38,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 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) [2024-11-09 10:54:38,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:38,844 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:38,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-09 10:54:39,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:39,045 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:39,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:39,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1410141264, now seen corresponding path program 1 times [2024-11-09 10:54:39,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:39,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609732497] [2024-11-09 10:54:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:39,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:39,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:39,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609732497] [2024-11-09 10:54:39,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609732497] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:39,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921222288] [2024-11-09 10:54:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:39,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:39,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:39,423 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:39,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 10:54:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:39,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-09 10:54:39,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:39,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:54:39,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 10:54:39,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:39,752 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:40,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-11-09 10:54:40,125 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:54:40,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 86 [2024-11-09 10:54:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:40,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921222288] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:40,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:40,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-09 10:54:40,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657621741] [2024-11-09 10:54:40,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:40,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 10:54:40,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:40,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 10:54:40,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:54:41,346 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:54:41,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 602 transitions, 9173 flow. Second operand has 26 states, 26 states have (on average 17.653846153846153) internal successors, (459), 26 states have internal predecessors, (459), 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) [2024-11-09 10:54:41,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:41,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:54:41,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:44,186 INFO L124 PetriNetUnfolderBase]: 6300/9360 cut-off events. [2024-11-09 10:54:44,186 INFO L125 PetriNetUnfolderBase]: For 96365/97092 co-relation queries the response was YES. [2024-11-09 10:54:44,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65835 conditions, 9360 events. 6300/9360 cut-off events. For 96365/97092 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 53236 event pairs, 583 based on Foata normal form. 202/9521 useless extension candidates. Maximal degree in co-relation 64428. Up to 5746 conditions per place. [2024-11-09 10:54:44,256 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 827 selfloop transitions, 413 changer transitions 8/1309 dead transitions. [2024-11-09 10:54:44,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 1309 transitions, 21874 flow [2024-11-09 10:54:44,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 10:54:44,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 10:54:44,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 468 transitions. [2024-11-09 10:54:44,258 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6007702182284981 [2024-11-09 10:54:44,258 INFO L175 Difference]: Start difference. First operand has 156 places, 602 transitions, 9173 flow. Second operand 19 states and 468 transitions. [2024-11-09 10:54:44,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 1309 transitions, 21874 flow [2024-11-09 10:54:45,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 1309 transitions, 21416 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:45,258 INFO L231 Difference]: Finished difference. Result has 178 places, 899 transitions, 15634 flow [2024-11-09 10:54:45,258 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8979, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=15634, PETRI_PLACES=178, PETRI_TRANSITIONS=899} [2024-11-09 10:54:45,259 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-11-09 10:54:45,259 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 899 transitions, 15634 flow [2024-11-09 10:54:45,259 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 17.653846153846153) internal successors, (459), 26 states have internal predecessors, (459), 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) [2024-11-09 10:54:45,259 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:45,259 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:45,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-09 10:54:45,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 10:54:45,463 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:45,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:45,464 INFO L85 PathProgramCache]: Analyzing trace with hash -937503956, now seen corresponding path program 2 times [2024-11-09 10:54:45,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:45,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859335618] [2024-11-09 10:54:45,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:45,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:45,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:45,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859335618] [2024-11-09 10:54:45,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859335618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:45,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171004843] [2024-11-09 10:54:45,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:45,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:45,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:45,924 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:45,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 10:54:45,992 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:45,992 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:45,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 10:54:45,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:46,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:54:46,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 10:54:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:46,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:46,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171004843] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:46,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:46,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 25 [2024-11-09 10:54:46,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601909125] [2024-11-09 10:54:46,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:46,452 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 10:54:46,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:46,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 10:54:46,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:54:46,990 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-09 10:54:46,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 899 transitions, 15634 flow. Second operand has 26 states, 26 states have (on average 16.653846153846153) internal successors, (433), 26 states have internal predecessors, (433), 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) [2024-11-09 10:54:46,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:46,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-09 10:54:46,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:50,282 INFO L124 PetriNetUnfolderBase]: 8343/12297 cut-off events. [2024-11-09 10:54:50,283 INFO L125 PetriNetUnfolderBase]: For 144356/145031 co-relation queries the response was YES. [2024-11-09 10:54:50,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89996 conditions, 12297 events. 8343/12297 cut-off events. For 144356/145031 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 71297 event pairs, 715 based on Foata normal form. 3/12299 useless extension candidates. Maximal degree in co-relation 89192. Up to 8767 conditions per place. [2024-11-09 10:54:50,390 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 1047 selfloop transitions, 535 changer transitions 4/1591 dead transitions. [2024-11-09 10:54:50,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 1591 transitions, 29515 flow [2024-11-09 10:54:50,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 10:54:50,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-09 10:54:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 590 transitions. [2024-11-09 10:54:50,392 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5329719963866305 [2024-11-09 10:54:50,392 INFO L175 Difference]: Start difference. First operand has 178 places, 899 transitions, 15634 flow. Second operand 27 states and 590 transitions. [2024-11-09 10:54:50,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 1591 transitions, 29515 flow [2024-11-09 10:54:52,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 1591 transitions, 28667 flow, removed 361 selfloop flow, removed 4 redundant places. [2024-11-09 10:54:52,215 INFO L231 Difference]: Finished difference. Result has 217 places, 1254 transitions, 24200 flow [2024-11-09 10:54:52,216 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15095, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=899, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=24200, PETRI_PLACES=217, PETRI_TRANSITIONS=1254} [2024-11-09 10:54:52,216 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-11-09 10:54:52,216 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 1254 transitions, 24200 flow [2024-11-09 10:54:52,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.653846153846153) internal successors, (433), 26 states have internal predecessors, (433), 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) [2024-11-09 10:54:52,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:52,217 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:52,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 10:54:52,420 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:52,421 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:52,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:52,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1004365218, now seen corresponding path program 1 times [2024-11-09 10:54:52,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:52,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881296745] [2024-11-09 10:54:52,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:52,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:52,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:52,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881296745] [2024-11-09 10:54:52,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881296745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:52,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116965960] [2024-11-09 10:54:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:52,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:52,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:52,623 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:52,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 10:54:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:52,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 10:54:52,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:54:52,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 10:54:52,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:52,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:54:52,991 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:54:52,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2024-11-09 10:54:53,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:54:53,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116965960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:54:53,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:54:53,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 5] total 16 [2024-11-09 10:54:53,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621077660] [2024-11-09 10:54:53,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:54:53,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:54:53,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:54:53,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:54:53,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:54:53,360 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-11-09 10:54:53,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 1254 transitions, 24200 flow. Second operand has 17 states, 17 states have (on average 19.88235294117647) internal successors, (338), 17 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) [2024-11-09 10:54:53,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:54:53,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-11-09 10:54:53,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:54:56,147 INFO L124 PetriNetUnfolderBase]: 8089/12296 cut-off events. [2024-11-09 10:54:56,148 INFO L125 PetriNetUnfolderBase]: For 193356/194875 co-relation queries the response was YES. [2024-11-09 10:54:56,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98289 conditions, 12296 events. 8089/12296 cut-off events. For 193356/194875 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 76393 event pairs, 405 based on Foata normal form. 495/12681 useless extension candidates. Maximal degree in co-relation 97592. Up to 7893 conditions per place. [2024-11-09 10:54:56,293 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 846 selfloop transitions, 556 changer transitions 30/1643 dead transitions. [2024-11-09 10:54:56,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 1643 transitions, 33720 flow [2024-11-09 10:54:56,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:54:56,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:54:56,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-11-09 10:54:56,294 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6554878048780488 [2024-11-09 10:54:56,294 INFO L175 Difference]: Start difference. First operand has 217 places, 1254 transitions, 24200 flow. Second operand 8 states and 215 transitions. [2024-11-09 10:54:56,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 1643 transitions, 33720 flow [2024-11-09 10:54:58,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 1643 transitions, 33111 flow, removed 213 selfloop flow, removed 6 redundant places. [2024-11-09 10:54:58,852 INFO L231 Difference]: Finished difference. Result has 222 places, 1425 transitions, 29344 flow [2024-11-09 10:54:58,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=23735, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=766, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=29344, PETRI_PLACES=222, PETRI_TRANSITIONS=1425} [2024-11-09 10:54:58,854 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-11-09 10:54:58,854 INFO L471 AbstractCegarLoop]: Abstraction has has 222 places, 1425 transitions, 29344 flow [2024-11-09 10:54:58,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.88235294117647) internal successors, (338), 17 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) [2024-11-09 10:54:58,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:54:58,854 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:54:58,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-09 10:54:59,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:59,059 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:54:59,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:54:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash 608407100, now seen corresponding path program 2 times [2024-11-09 10:54:59,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:54:59,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936114357] [2024-11-09 10:54:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:54:59,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:54:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:54:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:54:59,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:54:59,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936114357] [2024-11-09 10:54:59,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936114357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:54:59,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241614447] [2024-11-09 10:54:59,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:54:59,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:54:59,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:54:59,685 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:54:59,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 10:54:59,756 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:54:59,756 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:54:59,757 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:54:59,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:00,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 10:55:00,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:00,041 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:00,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:55:00,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 21 [2024-11-09 10:55:00,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:00,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241614447] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:00,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:00,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 18 [2024-11-09 10:55:00,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881881144] [2024-11-09 10:55:00,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:00,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 10:55:00,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:00,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 10:55:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2024-11-09 10:55:00,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-11-09 10:55:00,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 1425 transitions, 29344 flow. Second operand has 19 states, 19 states have (on average 19.473684210526315) internal successors, (370), 19 states have internal predecessors, (370), 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) [2024-11-09 10:55:00,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:00,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-11-09 10:55:00,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:03,786 INFO L124 PetriNetUnfolderBase]: 8810/13459 cut-off events. [2024-11-09 10:55:03,786 INFO L125 PetriNetUnfolderBase]: For 226096/227588 co-relation queries the response was YES. [2024-11-09 10:55:03,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110903 conditions, 13459 events. 8810/13459 cut-off events. For 226096/227588 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 84915 event pairs, 551 based on Foata normal form. 498/13753 useless extension candidates. Maximal degree in co-relation 110169. Up to 10188 conditions per place. [2024-11-09 10:55:04,080 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 1123 selfloop transitions, 281 changer transitions 4/1619 dead transitions. [2024-11-09 10:55:04,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 1619 transitions, 35416 flow [2024-11-09 10:55:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:55:04,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:55:04,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-11-09 10:55:04,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-11-09 10:55:04,082 INFO L175 Difference]: Start difference. First operand has 222 places, 1425 transitions, 29344 flow. Second operand 9 states and 225 transitions. [2024-11-09 10:55:04,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 1619 transitions, 35416 flow [2024-11-09 10:55:07,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 1619 transitions, 35155 flow, removed 111 selfloop flow, removed 3 redundant places. [2024-11-09 10:55:07,149 INFO L231 Difference]: Finished difference. Result has 230 places, 1520 transitions, 31994 flow [2024-11-09 10:55:07,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=29095, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=31994, PETRI_PLACES=230, PETRI_TRANSITIONS=1520} [2024-11-09 10:55:07,150 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-11-09 10:55:07,151 INFO L471 AbstractCegarLoop]: Abstraction has has 230 places, 1520 transitions, 31994 flow [2024-11-09 10:55:07,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.473684210526315) internal successors, (370), 19 states have internal predecessors, (370), 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) [2024-11-09 10:55:07,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:07,151 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:07,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 10:55:07,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:07,352 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:55:07,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:07,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1170475234, now seen corresponding path program 3 times [2024-11-09 10:55:07,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:07,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779117640] [2024-11-09 10:55:07,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:07,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:07,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:07,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:07,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779117640] [2024-11-09 10:55:07,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779117640] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:07,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290246575] [2024-11-09 10:55:07,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:55:07,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:07,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:07,563 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:07,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 10:55:07,655 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 10:55:07,655 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:07,657 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 10:55:07,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:07,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:55:07,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 10:55:07,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:07,827 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:07,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290246575] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:07,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:07,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 5] total 18 [2024-11-09 10:55:07,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396703753] [2024-11-09 10:55:07,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:07,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 10:55:07,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:07,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 10:55:07,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2024-11-09 10:55:08,141 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-11-09 10:55:08,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 1520 transitions, 31994 flow. Second operand has 19 states, 19 states have (on average 19.473684210526315) internal successors, (370), 19 states have internal predecessors, (370), 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) [2024-11-09 10:55:08,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:08,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-11-09 10:55:08,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:12,396 INFO L124 PetriNetUnfolderBase]: 9901/15110 cut-off events. [2024-11-09 10:55:12,397 INFO L125 PetriNetUnfolderBase]: For 275015/276637 co-relation queries the response was YES. [2024-11-09 10:55:12,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127474 conditions, 15110 events. 9901/15110 cut-off events. For 275015/276637 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 97212 event pairs, 656 based on Foata normal form. 514/15395 useless extension candidates. Maximal degree in co-relation 126729. Up to 10999 conditions per place. [2024-11-09 10:55:12,573 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 1214 selfloop transitions, 431 changer transitions 21/1877 dead transitions. [2024-11-09 10:55:12,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 1877 transitions, 42175 flow [2024-11-09 10:55:12,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:55:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:55:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-11-09 10:55:12,574 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2024-11-09 10:55:12,574 INFO L175 Difference]: Start difference. First operand has 230 places, 1520 transitions, 31994 flow. Second operand 9 states and 227 transitions. [2024-11-09 10:55:12,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 1877 transitions, 42175 flow [2024-11-09 10:55:16,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 1877 transitions, 41917 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-11-09 10:55:16,195 INFO L231 Difference]: Finished difference. Result has 237 places, 1714 transitions, 38006 flow [2024-11-09 10:55:16,196 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=31736, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=38006, PETRI_PLACES=237, PETRI_TRANSITIONS=1714} [2024-11-09 10:55:16,196 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-11-09 10:55:16,197 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 1714 transitions, 38006 flow [2024-11-09 10:55:16,197 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.473684210526315) internal successors, (370), 19 states have internal predecessors, (370), 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) [2024-11-09 10:55:16,197 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:16,197 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:16,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 10:55:16,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 10:55:16,398 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:55:16,398 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:16,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1008110386, now seen corresponding path program 3 times [2024-11-09 10:55:16,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:16,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144273441] [2024-11-09 10:55:16,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:16,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:16,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:16,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144273441] [2024-11-09 10:55:16,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144273441] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:16,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058692824] [2024-11-09 10:55:16,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:55:16,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:16,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:16,626 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:16,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 10:55:16,704 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 10:55:16,704 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:16,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 10:55:16,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:16,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:55:16,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 10:55:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:16,981 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:17,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:17,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058692824] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:17,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:17,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 25 [2024-11-09 10:55:17,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231176941] [2024-11-09 10:55:17,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:17,200 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 10:55:17,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:17,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 10:55:17,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:55:17,707 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-11-09 10:55:17,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 1714 transitions, 38006 flow. Second operand has 26 states, 26 states have (on average 17.53846153846154) internal successors, (456), 26 states have internal predecessors, (456), 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) [2024-11-09 10:55:17,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:17,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-11-09 10:55:17,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:23,479 INFO L124 PetriNetUnfolderBase]: 11666/17752 cut-off events. [2024-11-09 10:55:23,479 INFO L125 PetriNetUnfolderBase]: For 349478/351039 co-relation queries the response was YES. [2024-11-09 10:55:23,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152485 conditions, 17752 events. 11666/17752 cut-off events. For 349478/351039 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 116055 event pairs, 592 based on Foata normal form. 407/18022 useless extension candidates. Maximal degree in co-relation 151583. Up to 12613 conditions per place. [2024-11-09 10:55:23,703 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 1247 selfloop transitions, 901 changer transitions 7/2261 dead transitions. [2024-11-09 10:55:23,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 2261 transitions, 52698 flow [2024-11-09 10:55:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 10:55:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-09 10:55:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 421 transitions. [2024-11-09 10:55:23,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5704607046070461 [2024-11-09 10:55:23,705 INFO L175 Difference]: Start difference. First operand has 237 places, 1714 transitions, 38006 flow. Second operand 18 states and 421 transitions. [2024-11-09 10:55:23,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 2261 transitions, 52698 flow [2024-11-09 10:55:28,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 2261 transitions, 51854 flow, removed 84 selfloop flow, removed 6 redundant places. [2024-11-09 10:55:28,563 INFO L231 Difference]: Finished difference. Result has 254 places, 2085 transitions, 48804 flow [2024-11-09 10:55:28,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=37299, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1714, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=531, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=889, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=48804, PETRI_PLACES=254, PETRI_TRANSITIONS=2085} [2024-11-09 10:55:28,569 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-11-09 10:55:28,569 INFO L471 AbstractCegarLoop]: Abstraction has has 254 places, 2085 transitions, 48804 flow [2024-11-09 10:55:28,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 17.53846153846154) internal successors, (456), 26 states have internal predecessors, (456), 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) [2024-11-09 10:55:28,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:28,570 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:28,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-09 10:55:28,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 10:55:28,771 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:55:28,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:28,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1916934526, now seen corresponding path program 4 times [2024-11-09 10:55:28,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:28,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160981700] [2024-11-09 10:55:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:28,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:28,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:29,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:29,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:29,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160981700] [2024-11-09 10:55:29,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160981700] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:29,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97592228] [2024-11-09 10:55:29,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:55:29,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:29,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:29,036 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:29,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 10:55:29,103 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:55:29,103 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:29,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-09 10:55:29,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:29,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:55:29,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 10:55:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:29,375 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:29,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:29,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97592228] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:29,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:29,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 25 [2024-11-09 10:55:29,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079916212] [2024-11-09 10:55:29,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:29,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 10:55:29,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:29,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 10:55:29,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:55:30,142 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-11-09 10:55:30,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 2085 transitions, 48804 flow. Second operand has 26 states, 26 states have (on average 16.653846153846153) internal successors, (433), 26 states have internal predecessors, (433), 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) [2024-11-09 10:55:30,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:30,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-11-09 10:55:30,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:41,620 INFO L124 PetriNetUnfolderBase]: 14431/21570 cut-off events. [2024-11-09 10:55:41,620 INFO L125 PetriNetUnfolderBase]: For 442917/444462 co-relation queries the response was YES. [2024-11-09 10:55:41,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189340 conditions, 21570 events. 14431/21570 cut-off events. For 442917/444462 co-relation queries the response was YES. Maximal size of possible extension queue 1091. Compared 140490 event pairs, 957 based on Foata normal form. 226/21796 useless extension candidates. Maximal degree in co-relation 188195. Up to 15060 conditions per place. [2024-11-09 10:55:41,954 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 1571 selfloop transitions, 1422 changer transitions 10/3008 dead transitions. [2024-11-09 10:55:41,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 3008 transitions, 69481 flow [2024-11-09 10:55:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-09 10:55:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2024-11-09 10:55:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 1479 transitions. [2024-11-09 10:55:41,957 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5153310104529617 [2024-11-09 10:55:41,957 INFO L175 Difference]: Start difference. First operand has 254 places, 2085 transitions, 48804 flow. Second operand 70 states and 1479 transitions. [2024-11-09 10:55:41,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 3008 transitions, 69481 flow [2024-11-09 10:55:49,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 3008 transitions, 68623 flow, removed 145 selfloop flow, removed 8 redundant places. [2024-11-09 10:55:49,698 INFO L231 Difference]: Finished difference. Result has 341 places, 2597 transitions, 62682 flow [2024-11-09 10:55:49,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=48038, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2085, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=973, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1006, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=62682, PETRI_PLACES=341, PETRI_TRANSITIONS=2597} [2024-11-09 10:55:49,701 INFO L277 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-11-09 10:55:49,701 INFO L471 AbstractCegarLoop]: Abstraction has has 341 places, 2597 transitions, 62682 flow [2024-11-09 10:55:49,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.653846153846153) internal successors, (433), 26 states have internal predecessors, (433), 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) [2024-11-09 10:55:49,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:49,701 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:49,716 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 10:55:49,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 10:55:49,902 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2024-11-09 10:55:49,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:49,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1675269044, now seen corresponding path program 4 times [2024-11-09 10:55:49,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:49,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389056527] [2024-11-09 10:55:49,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:49,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:50,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:50,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:50,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389056527] [2024-11-09 10:55:50,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389056527] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:50,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967666500] [2024-11-09 10:55:50,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:55:50,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:50,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:50,159 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:55:50,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 10:55:50,220 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:55:50,220 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:50,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-11-09 10:55:50,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:50,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:55:50,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 10:55:50,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:55:50,396 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:50,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967666500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:50,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:50,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 5] total 19 [2024-11-09 10:55:50,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921043194] [2024-11-09 10:55:50,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:50,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-09 10:55:50,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:50,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-09 10:55:50,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2024-11-09 10:55:50,748 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-11-09 10:55:50,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 2597 transitions, 62682 flow. Second operand has 20 states, 20 states have (on average 19.3) internal successors, (386), 20 states have internal predecessors, (386), 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) [2024-11-09 10:55:50,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:50,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-11-09 10:55:50,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand