./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-queue-add-3.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-queue-add-3.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 d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:55:32,653 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:55:32,703 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:55:32,708 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:55:32,709 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:55:32,732 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:55:32,733 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:55:32,733 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:55:32,733 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:55:32,733 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:55:32,734 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:55:32,734 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:55:32,734 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:55:32,734 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:55:32,735 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:55:32,735 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:55:32,735 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:55:32,735 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:55:32,735 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:55:32,736 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:55:32,736 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:55:32,736 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:55:32,736 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:55:32,737 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:55:32,737 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:55:32,737 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:55:32,737 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:55:32,738 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:55:32,738 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:55:32,738 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:55:32,738 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:55:32,738 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:55:32,739 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:55:32,739 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:55:32,739 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:55:32,739 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:55:32,739 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:55:32,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:55:32,740 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:55:32,740 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:55:32,743 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:55:32,743 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:55:32,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 [2024-11-09 10:55:32,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:55:32,975 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:55:32,977 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:55:32,978 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:55:32,979 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:55:32,980 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2024-11-09 10:55:34,266 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:55:34,424 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:55:34,424 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2024-11-09 10:55:34,430 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3798fc1e/927792bdb3c54ea5a493d019aa7f5c20/FLAG9e2bc3177 [2024-11-09 10:55:34,833 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3798fc1e/927792bdb3c54ea5a493d019aa7f5c20 [2024-11-09 10:55:34,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:55:34,836 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:55:34,837 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:55:34,837 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:55:34,842 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:55:34,842 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:55:34" (1/1) ... [2024-11-09 10:55:34,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ee88f4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:34, skipping insertion in model container [2024-11-09 10:55:34,844 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:55:34" (1/1) ... [2024-11-09 10:55:34,868 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:55:35,038 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 10:55:35,040 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:55:35,048 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:55:35,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:55:35,085 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:55:35,085 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35 WrapperNode [2024-11-09 10:55:35,085 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:55:35,086 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:55:35,086 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:55:35,086 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:55:35,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,098 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,120 INFO L138 Inliner]: procedures = 24, calls = 41, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 241 [2024-11-09 10:55:35,120 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:55:35,121 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:55:35,121 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:55:35,121 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:55:35,130 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,132 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,153 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-09 10:55:35,154 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,158 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,165 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,170 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,172 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,173 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,176 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:55:35,177 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:55:35,177 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:55:35,177 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:55:35,178 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (1/1) ... [2024-11-09 10:55:35,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:55:35,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:35,235 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 10:55:35,238 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 10:55:35,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:55:35,283 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:55:35,283 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:55:35,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:55:35,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:55:35,284 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:55:35,284 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:55:35,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:55:35,284 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:55:35,285 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:55:35,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:55:35,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:55:35,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:55:35,287 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:55:35,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:55:35,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:55:35,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:55:35,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:55:35,289 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 10:55:35,409 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:55:35,411 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:55:35,805 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:55:35,805 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:55:36,007 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:55:36,007 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-09 10:55:36,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:55:36 BoogieIcfgContainer [2024-11-09 10:55:36,007 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:55:36,009 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:55:36,009 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:55:36,012 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:55:36,012 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:55:34" (1/3) ... [2024-11-09 10:55:36,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b29fd90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:55:36, skipping insertion in model container [2024-11-09 10:55:36,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:55:35" (2/3) ... [2024-11-09 10:55:36,013 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b29fd90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:55:36, skipping insertion in model container [2024-11-09 10:55:36,013 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:55:36" (3/3) ... [2024-11-09 10:55:36,014 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2024-11-09 10:55:36,028 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:55:36,028 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-09 10:55:36,028 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:55:36,074 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:55:36,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 62 transitions, 145 flow [2024-11-09 10:55:36,121 INFO L124 PetriNetUnfolderBase]: 7/59 cut-off events. [2024-11-09 10:55:36,122 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:55:36,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 59 events. 7/59 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 158 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2024-11-09 10:55:36,129 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 62 transitions, 145 flow [2024-11-09 10:55:36,131 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 61 places, 58 transitions, 134 flow [2024-11-09 10:55:36,138 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:55:36,143 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;@19cfa695, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:55:36,143 INFO L334 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2024-11-09 10:55:36,146 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:55:36,146 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:55:36,146 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:55:36,147 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:36,147 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:55:36,148 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:36,152 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash 740948, now seen corresponding path program 1 times [2024-11-09 10:55:36,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:36,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150600350] [2024-11-09 10:55:36,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:36,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:36,438 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 10:55:36,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:36,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150600350] [2024-11-09 10:55:36,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150600350] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:36,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:36,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:55:36,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137379837] [2024-11-09 10:55:36,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:36,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:55:36,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:55:36,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:55:36,499 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-09 10:55:36,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 58 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 10:55:36,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:36,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-09 10:55:36,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:37,060 INFO L124 PetriNetUnfolderBase]: 3101/5041 cut-off events. [2024-11-09 10:55:37,060 INFO L125 PetriNetUnfolderBase]: For 209/209 co-relation queries the response was YES. [2024-11-09 10:55:37,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9517 conditions, 5041 events. 3101/5041 cut-off events. For 209/209 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33100 event pairs, 2731 based on Foata normal form. 337/3515 useless extension candidates. Maximal degree in co-relation 9110. Up to 4203 conditions per place. [2024-11-09 10:55:37,102 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 38 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-11-09 10:55:37,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 52 transitions, 202 flow [2024-11-09 10:55:37,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:55:37,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:55:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-11-09 10:55:37,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-09 10:55:37,116 INFO L175 Difference]: Start difference. First operand has 61 places, 58 transitions, 134 flow. Second operand 3 states and 93 transitions. [2024-11-09 10:55:37,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 52 transitions, 202 flow [2024-11-09 10:55:37,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 190 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:55:37,126 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 114 flow [2024-11-09 10:55:37,128 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-11-09 10:55:37,131 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2024-11-09 10:55:37,131 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 114 flow [2024-11-09 10:55:37,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 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 10:55:37,131 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:37,131 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:55:37,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:55:37,132 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:37,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:37,132 INFO L85 PathProgramCache]: Analyzing trace with hash 740949, now seen corresponding path program 1 times [2024-11-09 10:55:37,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:37,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598684822] [2024-11-09 10:55:37,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:37,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:37,361 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 10:55:37,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:37,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598684822] [2024-11-09 10:55:37,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598684822] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:37,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:37,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:55:37,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699192785] [2024-11-09 10:55:37,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:37,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:37,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:37,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:37,374 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-09 10:55:37,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:37,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:37,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-09 10:55:37,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:37,842 INFO L124 PetriNetUnfolderBase]: 3101/5040 cut-off events. [2024-11-09 10:55:37,843 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-09 10:55:37,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9355 conditions, 5040 events. 3101/5040 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33103 event pairs, 2731 based on Foata normal form. 0/3177 useless extension candidates. Maximal degree in co-relation 9334. Up to 4207 conditions per place. [2024-11-09 10:55:37,874 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 37 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-11-09 10:55:37,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 194 flow [2024-11-09 10:55:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:37,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:37,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-11-09 10:55:37,878 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-11-09 10:55:37,878 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 114 flow. Second operand 4 states and 106 transitions. [2024-11-09 10:55:37,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 194 flow [2024-11-09 10:55:37,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 51 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:37,880 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 116 flow [2024-11-09 10:55:37,881 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-09 10:55:37,881 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -8 predicate places. [2024-11-09 10:55:37,882 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 116 flow [2024-11-09 10:55:37,882 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:37,883 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:37,883 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:55:37,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:55:37,884 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:37,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:37,884 INFO L85 PathProgramCache]: Analyzing trace with hash 22969954, now seen corresponding path program 1 times [2024-11-09 10:55:37,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:37,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139573473] [2024-11-09 10:55:37,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:37,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:38,066 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 10:55:38,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:38,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139573473] [2024-11-09 10:55:38,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139573473] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:38,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:38,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:55:38,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833499035] [2024-11-09 10:55:38,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:38,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:55:38,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:38,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:55:38,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:55:38,091 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-09 10:55:38,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 116 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 10:55:38,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:38,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-09 10:55:38,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:38,496 INFO L124 PetriNetUnfolderBase]: 3103/5046 cut-off events. [2024-11-09 10:55:38,496 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-09 10:55:38,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9372 conditions, 5046 events. 3103/5046 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33149 event pairs, 2731 based on Foata normal form. 0/3180 useless extension candidates. Maximal degree in co-relation 9348. Up to 4210 conditions per place. [2024-11-09 10:55:38,526 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 40 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-11-09 10:55:38,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 57 transitions, 228 flow [2024-11-09 10:55:38,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:55:38,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:55:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-09 10:55:38,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-11-09 10:55:38,528 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 116 flow. Second operand 5 states and 128 transitions. [2024-11-09 10:55:38,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 57 transitions, 228 flow [2024-11-09 10:55:38,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 214 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:55:38,529 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 161 flow [2024-11-09 10:55:38,530 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=161, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-11-09 10:55:38,530 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2024-11-09 10:55:38,530 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 161 flow [2024-11-09 10:55:38,530 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 10:55:38,530 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:38,531 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 10:55:38,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:55:38,531 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:38,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:38,531 INFO L85 PathProgramCache]: Analyzing trace with hash 599312510, now seen corresponding path program 1 times [2024-11-09 10:55:38,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:38,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718653746] [2024-11-09 10:55:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:38,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:38,744 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 10:55:38,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:38,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718653746] [2024-11-09 10:55:38,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718653746] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:38,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545587480] [2024-11-09 10:55:38,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:38,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:38,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:38,747 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 10:55:38,748 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 10:55:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:38,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:55:38,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:38,874 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 10:55:39,086 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 10:55:39,086 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:39,280 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 10:55:39,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545587480] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:39,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:39,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:55:39,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180342882] [2024-11-09 10:55:39,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:39,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:55:39,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:55:39,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:55:39,351 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-09 10:55:39,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 161 flow. Second operand has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 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 10:55:39,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:39,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-09 10:55:39,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:39,989 INFO L124 PetriNetUnfolderBase]: 3103/5045 cut-off events. [2024-11-09 10:55:39,990 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-09 10:55:39,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9385 conditions, 5045 events. 3103/5045 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 33088 event pairs, 2731 based on Foata normal form. 0/3183 useless extension candidates. Maximal degree in co-relation 9344. Up to 4203 conditions per place. [2024-11-09 10:55:40,023 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 34 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-11-09 10:55:40,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 56 transitions, 249 flow [2024-11-09 10:55:40,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:55:40,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:55:40,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-11-09 10:55:40,025 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3663594470046083 [2024-11-09 10:55:40,026 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 161 flow. Second operand 7 states and 159 transitions. [2024-11-09 10:55:40,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 56 transitions, 249 flow [2024-11-09 10:55:40,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 56 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:55:40,027 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 180 flow [2024-11-09 10:55:40,027 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-11-09 10:55:40,028 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2024-11-09 10:55:40,028 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 180 flow [2024-11-09 10:55:40,029 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 17.307692307692307) internal successors, (225), 13 states have internal predecessors, (225), 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 10:55:40,029 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:40,029 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:40,042 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 10:55:40,229 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:40,230 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:40,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:40,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1402594028, now seen corresponding path program 1 times [2024-11-09 10:55:40,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:40,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250983304] [2024-11-09 10:55:40,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:40,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:40,299 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 10:55:40,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:40,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250983304] [2024-11-09 10:55:40,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250983304] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:40,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:40,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:55:40,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241323205] [2024-11-09 10:55:40,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:40,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:40,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:40,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:40,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:40,308 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-09 10:55:40,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 10:55:40,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:40,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-09 10:55:40,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:40,681 INFO L124 PetriNetUnfolderBase]: 3243/5320 cut-off events. [2024-11-09 10:55:40,682 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-09 10:55:40,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9920 conditions, 5320 events. 3243/5320 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34862 event pairs, 2858 based on Foata normal form. 98/3590 useless extension candidates. Maximal degree in co-relation 9348. Up to 4212 conditions per place. [2024-11-09 10:55:40,707 INFO L140 encePairwiseOnDemand]: 47/62 looper letters, 58 selfloop transitions, 7 changer transitions 1/76 dead transitions. [2024-11-09 10:55:40,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 76 transitions, 385 flow [2024-11-09 10:55:40,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:55:40,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:55:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-11-09 10:55:40,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5193548387096775 [2024-11-09 10:55:40,709 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 180 flow. Second operand 5 states and 161 transitions. [2024-11-09 10:55:40,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 76 transitions, 385 flow [2024-11-09 10:55:40,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 336 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-09 10:55:40,711 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 214 flow [2024-11-09 10:55:40,711 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-11-09 10:55:40,712 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2024-11-09 10:55:40,712 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 214 flow [2024-11-09 10:55:40,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 10:55:40,712 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:40,712 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:40,713 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:55:40,713 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:40,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:40,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1861988887, now seen corresponding path program 1 times [2024-11-09 10:55:40,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:40,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578434387] [2024-11-09 10:55:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:40,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:40,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:40,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578434387] [2024-11-09 10:55:40,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578434387] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:40,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:40,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:55:40,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349639581] [2024-11-09 10:55:40,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:40,792 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:40,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:40,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:40,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:40,804 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-09 10:55:40,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:40,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:40,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-09 10:55:40,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:41,049 INFO L124 PetriNetUnfolderBase]: 2352/3863 cut-off events. [2024-11-09 10:55:41,049 INFO L125 PetriNetUnfolderBase]: For 365/365 co-relation queries the response was YES. [2024-11-09 10:55:41,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7923 conditions, 3863 events. 2352/3863 cut-off events. For 365/365 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23691 event pairs, 2053 based on Foata normal form. 0/2722 useless extension candidates. Maximal degree in co-relation 7380. Up to 3229 conditions per place. [2024-11-09 10:55:41,067 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 41 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2024-11-09 10:55:41,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 57 transitions, 296 flow [2024-11-09 10:55:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:55:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:55:41,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-09 10:55:41,069 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-11-09 10:55:41,069 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 214 flow. Second operand 5 states and 120 transitions. [2024-11-09 10:55:41,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 57 transitions, 296 flow [2024-11-09 10:55:41,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 57 transitions, 292 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-09 10:55:41,071 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 210 flow [2024-11-09 10:55:41,071 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-11-09 10:55:41,072 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 0 predicate places. [2024-11-09 10:55:41,072 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 210 flow [2024-11-09 10:55:41,072 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:41,072 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:41,072 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:41,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:55:41,072 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:41,073 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1861988888, now seen corresponding path program 1 times [2024-11-09 10:55:41,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:41,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462386284] [2024-11-09 10:55:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:41,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:41,240 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 10:55:41,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:41,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462386284] [2024-11-09 10:55:41,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462386284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:41,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368053231] [2024-11-09 10:55:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:41,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:41,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:41,244 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 10:55:41,245 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 10:55:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:41,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:55:41,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:41,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:55:41,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:55:41,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 10:55:41,392 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:55:41,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:55:41,415 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 10:55:41,415 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:55:41,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368053231] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:41,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:55:41,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2024-11-09 10:55:41,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743101996] [2024-11-09 10:55:41,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:41,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:55:41,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:41,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:55:41,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:55:41,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-09 10:55:41,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 10:55:41,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:41,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-09 10:55:41,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:41,607 INFO L124 PetriNetUnfolderBase]: 1607/2665 cut-off events. [2024-11-09 10:55:41,607 INFO L125 PetriNetUnfolderBase]: For 315/315 co-relation queries the response was YES. [2024-11-09 10:55:41,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5295 conditions, 2665 events. 1607/2665 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14965 event pairs, 1376 based on Foata normal form. 0/2089 useless extension candidates. Maximal degree in co-relation 4715. Up to 2230 conditions per place. [2024-11-09 10:55:41,620 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 41 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2024-11-09 10:55:41,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 54 transitions, 286 flow [2024-11-09 10:55:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:41,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-09 10:55:41,621 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-11-09 10:55:41,621 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 210 flow. Second operand 4 states and 101 transitions. [2024-11-09 10:55:41,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 54 transitions, 286 flow [2024-11-09 10:55:41,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 54 transitions, 271 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:55:41,623 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 189 flow [2024-11-09 10:55:41,624 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=189, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-11-09 10:55:41,624 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2024-11-09 10:55:41,624 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 189 flow [2024-11-09 10:55:41,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 10:55:41,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:41,625 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:41,638 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 10:55:41,825 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 10:55:41,826 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:41,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:41,826 INFO L85 PathProgramCache]: Analyzing trace with hash 444143548, now seen corresponding path program 1 times [2024-11-09 10:55:41,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:41,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818353853] [2024-11-09 10:55:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:41,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:41,875 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 10:55:41,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:41,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818353853] [2024-11-09 10:55:41,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818353853] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:41,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:41,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:55:41,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375013768] [2024-11-09 10:55:41,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:41,879 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:55:41,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:41,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:55:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:55:41,880 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-09 10:55:41,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 189 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:41,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:41,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-09 10:55:41,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:42,058 INFO L124 PetriNetUnfolderBase]: 1499/2491 cut-off events. [2024-11-09 10:55:42,059 INFO L125 PetriNetUnfolderBase]: For 350/350 co-relation queries the response was YES. [2024-11-09 10:55:42,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5120 conditions, 2491 events. 1499/2491 cut-off events. For 350/350 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 13265 event pairs, 577 based on Foata normal form. 71/1987 useless extension candidates. Maximal degree in co-relation 4858. Up to 1517 conditions per place. [2024-11-09 10:55:42,071 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 52 selfloop transitions, 2 changer transitions 5/69 dead transitions. [2024-11-09 10:55:42,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 345 flow [2024-11-09 10:55:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:55:42,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:55:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 106 transitions. [2024-11-09 10:55:42,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5698924731182796 [2024-11-09 10:55:42,073 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 189 flow. Second operand 3 states and 106 transitions. [2024-11-09 10:55:42,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 345 flow [2024-11-09 10:55:42,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:42,075 INFO L231 Difference]: Finished difference. Result has 58 places, 50 transitions, 162 flow [2024-11-09 10:55:42,075 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=58, PETRI_TRANSITIONS=50} [2024-11-09 10:55:42,077 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2024-11-09 10:55:42,078 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 50 transitions, 162 flow [2024-11-09 10:55:42,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:42,081 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:42,081 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:42,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:55:42,082 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:42,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:42,082 INFO L85 PathProgramCache]: Analyzing trace with hash 697145832, now seen corresponding path program 1 times [2024-11-09 10:55:42,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:42,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896956241] [2024-11-09 10:55:42,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:42,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:42,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:42,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896956241] [2024-11-09 10:55:42,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896956241] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:42,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:42,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:55:42,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809554363] [2024-11-09 10:55:42,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:42,117 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:55:42,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:42,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:55:42,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:55:42,118 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-09 10:55:42,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 50 transitions, 162 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:42,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:42,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-09 10:55:42,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:42,274 INFO L124 PetriNetUnfolderBase]: 1318/2188 cut-off events. [2024-11-09 10:55:42,274 INFO L125 PetriNetUnfolderBase]: For 408/411 co-relation queries the response was YES. [2024-11-09 10:55:42,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4800 conditions, 2188 events. 1318/2188 cut-off events. For 408/411 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11003 event pairs, 527 based on Foata normal form. 15/1831 useless extension candidates. Maximal degree in co-relation 4773. Up to 1772 conditions per place. [2024-11-09 10:55:42,285 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 47 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2024-11-09 10:55:42,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 60 transitions, 288 flow [2024-11-09 10:55:42,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:55:42,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:55:42,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-09 10:55:42,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.532258064516129 [2024-11-09 10:55:42,287 INFO L175 Difference]: Start difference. First operand has 58 places, 50 transitions, 162 flow. Second operand 3 states and 99 transitions. [2024-11-09 10:55:42,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 60 transitions, 288 flow [2024-11-09 10:55:42,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 278 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:42,288 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 175 flow [2024-11-09 10:55:42,289 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=175, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-11-09 10:55:42,289 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -4 predicate places. [2024-11-09 10:55:42,289 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 175 flow [2024-11-09 10:55:42,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:42,290 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:42,290 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:42,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:55:42,290 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:42,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:42,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1765386403, now seen corresponding path program 1 times [2024-11-09 10:55:42,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:42,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562634498] [2024-11-09 10:55:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:42,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:42,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:42,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562634498] [2024-11-09 10:55:42,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562634498] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:42,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:42,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:55:42,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367366279] [2024-11-09 10:55:42,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:42,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:42,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:42,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:42,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:42,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-09 10:55:42,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 175 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:42,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:42,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-09 10:55:42,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:42,530 INFO L124 PetriNetUnfolderBase]: 964/1685 cut-off events. [2024-11-09 10:55:42,530 INFO L125 PetriNetUnfolderBase]: For 869/869 co-relation queries the response was YES. [2024-11-09 10:55:42,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3901 conditions, 1685 events. 964/1685 cut-off events. For 869/869 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8472 event pairs, 704 based on Foata normal form. 0/1513 useless extension candidates. Maximal degree in co-relation 3873. Up to 1366 conditions per place. [2024-11-09 10:55:42,540 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 37 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2024-11-09 10:55:42,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 50 transitions, 249 flow [2024-11-09 10:55:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:42,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-11-09 10:55:42,542 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-11-09 10:55:42,542 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 175 flow. Second operand 4 states and 98 transitions. [2024-11-09 10:55:42,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 50 transitions, 249 flow [2024-11-09 10:55:42,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 50 transitions, 236 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:42,544 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 162 flow [2024-11-09 10:55:42,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-11-09 10:55:42,545 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -5 predicate places. [2024-11-09 10:55:42,545 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 162 flow [2024-11-09 10:55:42,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:42,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:42,546 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:42,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:55:42,546 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:42,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:42,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1464885612, now seen corresponding path program 1 times [2024-11-09 10:55:42,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:42,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878582133] [2024-11-09 10:55:42,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:42,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:42,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:42,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878582133] [2024-11-09 10:55:42,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878582133] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:42,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:42,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:55:42,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422438255] [2024-11-09 10:55:42,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:42,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:42,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:42,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:42,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:42,620 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-09 10:55:42,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 10:55:42,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:42,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-09 10:55:42,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:42,845 INFO L124 PetriNetUnfolderBase]: 1205/2131 cut-off events. [2024-11-09 10:55:42,845 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2024-11-09 10:55:42,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4568 conditions, 2131 events. 1205/2131 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11110 event pairs, 906 based on Foata normal form. 64/2025 useless extension candidates. Maximal degree in co-relation 4540. Up to 1374 conditions per place. [2024-11-09 10:55:42,854 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 37 selfloop transitions, 2 changer transitions 19/68 dead transitions. [2024-11-09 10:55:42,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 68 transitions, 328 flow [2024-11-09 10:55:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:42,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 125 transitions. [2024-11-09 10:55:42,856 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5040322580645161 [2024-11-09 10:55:42,856 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 162 flow. Second operand 4 states and 125 transitions. [2024-11-09 10:55:42,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 68 transitions, 328 flow [2024-11-09 10:55:42,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:42,858 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 160 flow [2024-11-09 10:55:42,858 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=160, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2024-11-09 10:55:42,858 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -3 predicate places. [2024-11-09 10:55:42,858 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 160 flow [2024-11-09 10:55:42,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 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 10:55:42,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:42,859 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:42,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:55:42,859 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:42,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:42,860 INFO L85 PathProgramCache]: Analyzing trace with hash 962373648, now seen corresponding path program 1 times [2024-11-09 10:55:42,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:42,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169571335] [2024-11-09 10:55:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:42,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:42,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:43,020 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 10:55:43,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:43,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169571335] [2024-11-09 10:55:43,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169571335] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:43,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:43,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:55:43,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514701717] [2024-11-09 10:55:43,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:43,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:55:43,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:43,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:55:43,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:55:43,034 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-09 10:55:43,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 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 10:55:43,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:43,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-09 10:55:43,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:43,142 INFO L124 PetriNetUnfolderBase]: 663/1231 cut-off events. [2024-11-09 10:55:43,143 INFO L125 PetriNetUnfolderBase]: For 392/392 co-relation queries the response was YES. [2024-11-09 10:55:43,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 1231 events. 663/1231 cut-off events. For 392/392 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6188 event pairs, 474 based on Foata normal form. 86/1223 useless extension candidates. Maximal degree in co-relation 2593. Up to 945 conditions per place. [2024-11-09 10:55:43,149 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 35 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-09 10:55:43,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 226 flow [2024-11-09 10:55:43,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-09 10:55:43,151 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-11-09 10:55:43,151 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 160 flow. Second operand 4 states and 104 transitions. [2024-11-09 10:55:43,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 226 flow [2024-11-09 10:55:43,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 47 transitions, 222 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:43,153 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 152 flow [2024-11-09 10:55:43,153 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2024-11-09 10:55:43,154 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, -5 predicate places. [2024-11-09 10:55:43,154 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 152 flow [2024-11-09 10:55:43,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 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 10:55:43,154 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:43,154 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:43,154 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:55:43,155 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:43,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:43,155 INFO L85 PathProgramCache]: Analyzing trace with hash 214930534, now seen corresponding path program 1 times [2024-11-09 10:55:43,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:43,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680398787] [2024-11-09 10:55:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:43,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:43,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:55:43,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:43,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680398787] [2024-11-09 10:55:43,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680398787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:43,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:43,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 10:55:43,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194800086] [2024-11-09 10:55:43,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:43,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:55:43,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:43,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:55:43,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:55:43,321 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-09 10:55:43,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 152 flow. Second operand has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 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 10:55:43,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:43,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-09 10:55:43,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:43,565 INFO L124 PetriNetUnfolderBase]: 1274/2136 cut-off events. [2024-11-09 10:55:43,565 INFO L125 PetriNetUnfolderBase]: For 548/564 co-relation queries the response was YES. [2024-11-09 10:55:43,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4759 conditions, 2136 events. 1274/2136 cut-off events. For 548/564 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11770 event pairs, 342 based on Foata normal form. 1/2086 useless extension candidates. Maximal degree in co-relation 4730. Up to 775 conditions per place. [2024-11-09 10:55:43,576 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 82 selfloop transitions, 9 changer transitions 10/109 dead transitions. [2024-11-09 10:55:43,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 527 flow [2024-11-09 10:55:43,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:55:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:55:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 223 transitions. [2024-11-09 10:55:43,577 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4495967741935484 [2024-11-09 10:55:43,578 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 152 flow. Second operand 8 states and 223 transitions. [2024-11-09 10:55:43,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 527 flow [2024-11-09 10:55:43,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 524 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:43,580 INFO L231 Difference]: Finished difference. Result has 64 places, 53 transitions, 199 flow [2024-11-09 10:55:43,580 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=199, PETRI_PLACES=64, PETRI_TRANSITIONS=53} [2024-11-09 10:55:43,581 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 3 predicate places. [2024-11-09 10:55:43,581 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 53 transitions, 199 flow [2024-11-09 10:55:43,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 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 10:55:43,582 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:43,582 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:43,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:55:43,582 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:43,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:43,583 INFO L85 PathProgramCache]: Analyzing trace with hash -928937351, now seen corresponding path program 1 times [2024-11-09 10:55:43,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:43,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137768493] [2024-11-09 10:55:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:43,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:43,737 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 10:55:43,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:43,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137768493] [2024-11-09 10:55:43,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137768493] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:43,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122240979] [2024-11-09 10:55:43,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:43,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:43,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:43,740 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 10:55:43,741 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 10:55:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:43,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:55:43,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:43,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:43,993 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 10:55:43,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122240979] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:43,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:43,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-09 10:55:43,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564594179] [2024-11-09 10:55:43,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:43,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:55:43,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:43,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:55:43,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:55:44,034 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-09 10:55:44,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 53 transitions, 199 flow. Second operand has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 14 states have internal predecessors, (316), 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 10:55:44,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:44,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-09 10:55:44,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:44,478 INFO L124 PetriNetUnfolderBase]: 1661/3295 cut-off events. [2024-11-09 10:55:44,478 INFO L125 PetriNetUnfolderBase]: For 1421/1423 co-relation queries the response was YES. [2024-11-09 10:55:44,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7666 conditions, 3295 events. 1661/3295 cut-off events. For 1421/1423 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 21951 event pairs, 909 based on Foata normal form. 113/3257 useless extension candidates. Maximal degree in co-relation 7650. Up to 1488 conditions per place. [2024-11-09 10:55:44,494 INFO L140 encePairwiseOnDemand]: 52/62 looper letters, 68 selfloop transitions, 17 changer transitions 6/104 dead transitions. [2024-11-09 10:55:44,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 104 transitions, 558 flow [2024-11-09 10:55:44,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 10:55:44,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-09 10:55:44,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-11-09 10:55:44,496 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-11-09 10:55:44,496 INFO L175 Difference]: Start difference. First operand has 64 places, 53 transitions, 199 flow. Second operand 10 states and 262 transitions. [2024-11-09 10:55:44,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 104 transitions, 558 flow [2024-11-09 10:55:44,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 551 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:44,499 INFO L231 Difference]: Finished difference. Result has 76 places, 63 transitions, 318 flow [2024-11-09 10:55:44,500 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=318, PETRI_PLACES=76, PETRI_TRANSITIONS=63} [2024-11-09 10:55:44,500 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 15 predicate places. [2024-11-09 10:55:44,500 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 63 transitions, 318 flow [2024-11-09 10:55:44,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 22.571428571428573) internal successors, (316), 14 states have internal predecessors, (316), 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 10:55:44,501 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:44,501 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:44,518 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 10:55:44,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:44,705 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:44,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:44,706 INFO L85 PathProgramCache]: Analyzing trace with hash 422238282, now seen corresponding path program 1 times [2024-11-09 10:55:44,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:44,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194304018] [2024-11-09 10:55:44,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:44,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:44,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:55:44,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:44,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194304018] [2024-11-09 10:55:44,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194304018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:44,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:44,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:55:44,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458158745] [2024-11-09 10:55:44,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:44,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:44,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:44,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:44,800 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-09 10:55:44,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 63 transitions, 318 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:44,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:44,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-09 10:55:44,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:45,217 INFO L124 PetriNetUnfolderBase]: 2547/5190 cut-off events. [2024-11-09 10:55:45,217 INFO L125 PetriNetUnfolderBase]: For 4301/4459 co-relation queries the response was YES. [2024-11-09 10:55:45,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12647 conditions, 5190 events. 2547/5190 cut-off events. For 4301/4459 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 37434 event pairs, 732 based on Foata normal form. 132/5066 useless extension candidates. Maximal degree in co-relation 9774. Up to 1370 conditions per place. [2024-11-09 10:55:45,258 INFO L140 encePairwiseOnDemand]: 59/62 looper letters, 82 selfloop transitions, 6 changer transitions 0/101 dead transitions. [2024-11-09 10:55:45,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 637 flow [2024-11-09 10:55:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-09 10:55:45,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2024-11-09 10:55:45,260 INFO L175 Difference]: Start difference. First operand has 76 places, 63 transitions, 318 flow. Second operand 4 states and 138 transitions. [2024-11-09 10:55:45,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 637 flow [2024-11-09 10:55:45,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 101 transitions, 620 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:45,267 INFO L231 Difference]: Finished difference. Result has 79 places, 67 transitions, 362 flow [2024-11-09 10:55:45,268 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=362, PETRI_PLACES=79, PETRI_TRANSITIONS=67} [2024-11-09 10:55:45,269 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 18 predicate places. [2024-11-09 10:55:45,269 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 67 transitions, 362 flow [2024-11-09 10:55:45,269 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:55:45,269 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:45,269 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:45,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:55:45,270 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:45,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:45,270 INFO L85 PathProgramCache]: Analyzing trace with hash 449455392, now seen corresponding path program 2 times [2024-11-09 10:55:45,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:45,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433352938] [2024-11-09 10:55:45,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:45,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:45,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:45,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433352938] [2024-11-09 10:55:45,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433352938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:45,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719179772] [2024-11-09 10:55:45,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:55:45,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:45,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:45,618 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 10:55:45,619 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 10:55:45,700 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:55:45,700 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:45,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-09 10:55:45,703 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:45,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:55:45,895 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 23 treesize of output 15 [2024-11-09 10:55:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:46,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:46,188 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:55:46,189 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 25 treesize of output 12 [2024-11-09 10:55:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:46,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719179772] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:46,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:46,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2024-11-09 10:55:46,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541839446] [2024-11-09 10:55:46,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:46,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-09 10:55:46,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:46,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-09 10:55:46,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-11-09 10:55:46,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-09 10:55:46,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 67 transitions, 362 flow. Second operand has 22 states, 22 states have (on average 19.772727272727273) internal successors, (435), 22 states have internal predecessors, (435), 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 10:55:46,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:46,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-09 10:55:46,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:49,970 INFO L124 PetriNetUnfolderBase]: 14597/24433 cut-off events. [2024-11-09 10:55:49,971 INFO L125 PetriNetUnfolderBase]: For 38753/40281 co-relation queries the response was YES. [2024-11-09 10:55:50,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69425 conditions, 24433 events. 14597/24433 cut-off events. For 38753/40281 co-relation queries the response was YES. Maximal size of possible extension queue 1101. Compared 189990 event pairs, 1333 based on Foata normal form. 145/23766 useless extension candidates. Maximal degree in co-relation 48299. Up to 3923 conditions per place. [2024-11-09 10:55:50,218 INFO L140 encePairwiseOnDemand]: 51/62 looper letters, 340 selfloop transitions, 55 changer transitions 0/406 dead transitions. [2024-11-09 10:55:50,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 406 transitions, 2631 flow [2024-11-09 10:55:50,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 10:55:50,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-09 10:55:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 782 transitions. [2024-11-09 10:55:50,224 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4504608294930876 [2024-11-09 10:55:50,224 INFO L175 Difference]: Start difference. First operand has 79 places, 67 transitions, 362 flow. Second operand 28 states and 782 transitions. [2024-11-09 10:55:50,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 406 transitions, 2631 flow [2024-11-09 10:55:50,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 406 transitions, 2571 flow, removed 30 selfloop flow, removed 0 redundant places. [2024-11-09 10:55:50,241 INFO L231 Difference]: Finished difference. Result has 115 places, 123 transitions, 884 flow [2024-11-09 10:55:50,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=884, PETRI_PLACES=115, PETRI_TRANSITIONS=123} [2024-11-09 10:55:50,243 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 54 predicate places. [2024-11-09 10:55:50,243 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 123 transitions, 884 flow [2024-11-09 10:55:50,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.772727272727273) internal successors, (435), 22 states have internal predecessors, (435), 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 10:55:50,243 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:50,243 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:50,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 10:55:50,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 10:55:50,447 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:50,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:50,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1046561614, now seen corresponding path program 3 times [2024-11-09 10:55:50,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:50,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975020561] [2024-11-09 10:55:50,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:50,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:55:50,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:50,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975020561] [2024-11-09 10:55:50,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975020561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:50,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052329396] [2024-11-09 10:55:50,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:55:50,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:50,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:50,882 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 10:55:50,883 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 10:55:50,971 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:55:50,971 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:55:50,972 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-09 10:55:50,974 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:55:51,046 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:51,079 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:55:51,080 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 25 treesize of output 12 [2024-11-09 10:55:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:55:51,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052329396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:51,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:51,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 12 [2024-11-09 10:55:51,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344867637] [2024-11-09 10:55:51,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:51,101 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:55:51,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:51,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:55:51,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:55:51,155 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-09 10:55:51,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 884 flow. Second operand has 13 states, 13 states have (on average 21.153846153846153) internal successors, (275), 13 states have internal predecessors, (275), 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 10:55:51,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:51,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-09 10:55:51,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:53,868 INFO L124 PetriNetUnfolderBase]: 13654/23625 cut-off events. [2024-11-09 10:55:53,868 INFO L125 PetriNetUnfolderBase]: For 50813/52339 co-relation queries the response was YES. [2024-11-09 10:55:54,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72676 conditions, 23625 events. 13654/23625 cut-off events. For 50813/52339 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 189375 event pairs, 4151 based on Foata normal form. 113/22888 useless extension candidates. Maximal degree in co-relation 52444. Up to 14131 conditions per place. [2024-11-09 10:55:54,107 INFO L140 encePairwiseOnDemand]: 52/62 looper letters, 172 selfloop transitions, 37 changer transitions 0/220 dead transitions. [2024-11-09 10:55:54,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 220 transitions, 1743 flow [2024-11-09 10:55:54,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-09 10:55:54,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-09 10:55:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 363 transitions. [2024-11-09 10:55:54,110 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4182027649769585 [2024-11-09 10:55:54,110 INFO L175 Difference]: Start difference. First operand has 115 places, 123 transitions, 884 flow. Second operand 14 states and 363 transitions. [2024-11-09 10:55:54,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 220 transitions, 1743 flow [2024-11-09 10:55:54,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 220 transitions, 1508 flow, removed 115 selfloop flow, removed 2 redundant places. [2024-11-09 10:55:54,216 INFO L231 Difference]: Finished difference. Result has 129 places, 131 transitions, 911 flow [2024-11-09 10:55:54,217 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=911, PETRI_PLACES=129, PETRI_TRANSITIONS=131} [2024-11-09 10:55:54,217 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 68 predicate places. [2024-11-09 10:55:54,218 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 131 transitions, 911 flow [2024-11-09 10:55:54,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.153846153846153) internal successors, (275), 13 states have internal predecessors, (275), 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 10:55:54,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:54,218 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:54,239 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 10:55:54,418 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,SelfDestructingSolverStorable16 [2024-11-09 10:55:54,419 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:54,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1390369080, now seen corresponding path program 1 times [2024-11-09 10:55:54,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:54,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031866388] [2024-11-09 10:55:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:54,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:54,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-09 10:55:54,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:54,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031866388] [2024-11-09 10:55:54,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031866388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:55:54,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:55:54,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:55:54,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537119641] [2024-11-09 10:55:54,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:55:54,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:55:54,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:54,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:55:54,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:55:54,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-09 10:55:54,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 131 transitions, 911 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 10:55:54,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:54,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-09 10:55:54,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:55:57,220 INFO L124 PetriNetUnfolderBase]: 13722/25663 cut-off events. [2024-11-09 10:55:57,221 INFO L125 PetriNetUnfolderBase]: For 47929/49721 co-relation queries the response was YES. [2024-11-09 10:55:57,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72670 conditions, 25663 events. 13722/25663 cut-off events. For 47929/49721 co-relation queries the response was YES. Maximal size of possible extension queue 1289. Compared 227528 event pairs, 4181 based on Foata normal form. 480/25505 useless extension candidates. Maximal degree in co-relation 71304. Up to 12243 conditions per place. [2024-11-09 10:55:57,519 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 129 selfloop transitions, 33 changer transitions 16/201 dead transitions. [2024-11-09 10:55:57,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 201 transitions, 1567 flow [2024-11-09 10:55:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:55:57,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:55:57,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-11-09 10:55:57,521 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-11-09 10:55:57,521 INFO L175 Difference]: Start difference. First operand has 129 places, 131 transitions, 911 flow. Second operand 4 states and 144 transitions. [2024-11-09 10:55:57,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 201 transitions, 1567 flow [2024-11-09 10:55:57,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 201 transitions, 1533 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-09 10:55:57,631 INFO L231 Difference]: Finished difference. Result has 127 places, 140 transitions, 1016 flow [2024-11-09 10:55:57,632 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=857, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1016, PETRI_PLACES=127, PETRI_TRANSITIONS=140} [2024-11-09 10:55:57,632 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 66 predicate places. [2024-11-09 10:55:57,632 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 140 transitions, 1016 flow [2024-11-09 10:55:57,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 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 10:55:57,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:55:57,633 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:55:57,633 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 10:55:57,634 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:55:57,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:55:57,634 INFO L85 PathProgramCache]: Analyzing trace with hash -280775370, now seen corresponding path program 1 times [2024-11-09 10:55:57,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:55:57,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585955861] [2024-11-09 10:55:57,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:57,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:55:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:55:57,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:55:57,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585955861] [2024-11-09 10:55:57,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585955861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:55:57,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961197813] [2024-11-09 10:55:57,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:55:57,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:55:57,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:55:57,786 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 10:55:57,787 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 10:55:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:55:57,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-09 10:55:57,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:55:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:55:57,957 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:55:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:55:58,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961197813] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:55:58,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:55:58,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 15 [2024-11-09 10:55:58,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362385256] [2024-11-09 10:55:58,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:55:58,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:55:58,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:55:58,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:55:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:55:58,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-09 10:55:58,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 140 transitions, 1016 flow. Second operand has 15 states, 15 states have (on average 22.8) internal successors, (342), 15 states have internal predecessors, (342), 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 10:55:58,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:55:58,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-09 10:55:58,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:01,820 INFO L124 PetriNetUnfolderBase]: 16219/31446 cut-off events. [2024-11-09 10:56:01,820 INFO L125 PetriNetUnfolderBase]: For 72362/74092 co-relation queries the response was YES. [2024-11-09 10:56:02,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94477 conditions, 31446 events. 16219/31446 cut-off events. For 72362/74092 co-relation queries the response was YES. Maximal size of possible extension queue 1337. Compared 293900 event pairs, 10200 based on Foata normal form. 635/31507 useless extension candidates. Maximal degree in co-relation 94446. Up to 19476 conditions per place. [2024-11-09 10:56:02,247 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 103 selfloop transitions, 18 changer transitions 143/287 dead transitions. [2024-11-09 10:56:02,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 287 transitions, 2576 flow [2024-11-09 10:56:02,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 10:56:02,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-09 10:56:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-11-09 10:56:02,248 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42473118279569894 [2024-11-09 10:56:02,248 INFO L175 Difference]: Start difference. First operand has 127 places, 140 transitions, 1016 flow. Second operand 9 states and 237 transitions. [2024-11-09 10:56:02,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 287 transitions, 2576 flow [2024-11-09 10:56:02,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 287 transitions, 2538 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-11-09 10:56:02,434 INFO L231 Difference]: Finished difference. Result has 125 places, 144 transitions, 1105 flow [2024-11-09 10:56:02,435 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1105, PETRI_PLACES=125, PETRI_TRANSITIONS=144} [2024-11-09 10:56:02,435 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 64 predicate places. [2024-11-09 10:56:02,435 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 144 transitions, 1105 flow [2024-11-09 10:56:02,435 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.8) internal successors, (342), 15 states have internal predecessors, (342), 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 10:56:02,435 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:02,436 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:02,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:56:02,636 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:02,636 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:56:02,637 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:02,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1984409472, now seen corresponding path program 2 times [2024-11-09 10:56:02,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:02,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860728265] [2024-11-09 10:56:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:02,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:03,787 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:56:03,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:03,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860728265] [2024-11-09 10:56:03,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860728265] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:03,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373092626] [2024-11-09 10:56:03,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:56:03,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:03,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:03,790 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 10:56:03,791 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 10:56:03,881 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:56:03,881 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:56:03,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 10:56:03,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:04,199 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 24 treesize of output 8 [2024-11-09 10:56:04,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:56:04,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:04,379 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:56:04,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2024-11-09 10:56:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:56:04,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373092626] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:04,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:04,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 10] total 32 [2024-11-09 10:56:04,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460448852] [2024-11-09 10:56:04,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:04,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-09 10:56:04,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:04,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-09 10:56:04,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2024-11-09 10:56:05,008 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 62 [2024-11-09 10:56:05,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 144 transitions, 1105 flow. Second operand has 33 states, 33 states have (on average 17.12121212121212) internal successors, (565), 33 states have internal predecessors, (565), 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 10:56:05,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:05,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 62 [2024-11-09 10:56:05,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:56:25,479 INFO L124 PetriNetUnfolderBase]: 97395/162269 cut-off events. [2024-11-09 10:56:25,479 INFO L125 PetriNetUnfolderBase]: For 336148/336148 co-relation queries the response was YES. [2024-11-09 10:56:26,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 476466 conditions, 162269 events. 97395/162269 cut-off events. For 336148/336148 co-relation queries the response was YES. Maximal size of possible extension queue 6463. Compared 1589555 event pairs, 12795 based on Foata normal form. 4744/155833 useless extension candidates. Maximal degree in co-relation 476435. Up to 19568 conditions per place. [2024-11-09 10:56:27,348 INFO L140 encePairwiseOnDemand]: 48/62 looper letters, 1337 selfloop transitions, 230 changer transitions 429/2004 dead transitions. [2024-11-09 10:56:27,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 2004 transitions, 16364 flow [2024-11-09 10:56:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-11-09 10:56:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2024-11-09 10:56:27,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 1779 transitions. [2024-11-09 10:56:27,353 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4158485273492286 [2024-11-09 10:56:27,353 INFO L175 Difference]: Start difference. First operand has 125 places, 144 transitions, 1105 flow. Second operand 69 states and 1779 transitions. [2024-11-09 10:56:27,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 2004 transitions, 16364 flow [2024-11-09 10:56:31,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 2004 transitions, 16275 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-11-09 10:56:31,172 INFO L231 Difference]: Finished difference. Result has 237 places, 372 transitions, 4202 flow [2024-11-09 10:56:31,172 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=4202, PETRI_PLACES=237, PETRI_TRANSITIONS=372} [2024-11-09 10:56:31,172 INFO L277 CegarLoopForPetriNet]: 61 programPoint places, 176 predicate places. [2024-11-09 10:56:31,173 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 372 transitions, 4202 flow [2024-11-09 10:56:31,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 17.12121212121212) internal successors, (565), 33 states have internal predecessors, (565), 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 10:56:31,173 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:56:31,173 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:56:31,186 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 10:56:31,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:31,374 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 26 more)] === [2024-11-09 10:56:31,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:56:31,374 INFO L85 PathProgramCache]: Analyzing trace with hash -789970770, now seen corresponding path program 3 times [2024-11-09 10:56:31,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:56:31,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407467803] [2024-11-09 10:56:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:56:31,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:56:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:56:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:56:32,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:56:32,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407467803] [2024-11-09 10:56:32,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407467803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:56:32,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689107630] [2024-11-09 10:56:32,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:56:32,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:56:32,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:56:32,056 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 10:56:32,062 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 10:56:32,176 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:56:32,176 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:56:32,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:56:32,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:56:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 10:56:32,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:56:32,523 INFO L349 Elim1Store]: treesize reduction 23, result has 75.3 percent of original size [2024-11-09 10:56:32,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 82 [2024-11-09 10:56:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 10:56:32,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689107630] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:56:32,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:56:32,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 20 [2024-11-09 10:56:32,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555221321] [2024-11-09 10:56:32,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:56:32,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 10:56:32,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:56:32,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 10:56:32,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-11-09 10:56:32,801 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 62 [2024-11-09 10:56:32,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 372 transitions, 4202 flow. Second operand has 21 states, 21 states have (on average 17.904761904761905) internal successors, (376), 21 states have internal predecessors, (376), 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 10:56:32,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:56:32,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 62 [2024-11-09 10:56:32,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand