./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/parallel-misc-1.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 faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:45:07,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:45:07,095 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:45:07,101 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:45:07,103 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:45:07,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:45:07,144 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:45:07,144 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:45:07,144 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:45:07,145 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:45:07,145 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:45:07,145 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:45:07,145 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:45:07,146 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:45:07,146 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:45:07,146 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:45:07,146 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:45:07,146 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:45:07,147 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:45:07,147 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:45:07,147 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:45:07,148 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:45:07,148 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:45:07,148 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:45:07,149 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:45:07,149 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:45:07,149 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:45:07,149 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:45:07,150 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:45:07,150 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:45:07,150 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:45:07,150 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:45:07,154 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:45:07,154 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:45:07,154 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:45:07,154 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:45:07,155 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:45:07,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:45:07,155 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:45:07,155 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:45:07,155 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:45:07,155 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:45:07,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> faddac23864cc4e42f962ac43a8d0f59593853dbb1d55e3baabe0c76b2187dd4 [2024-11-22 21:45:07,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:45:07,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:45:07,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:45:07,370 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:45:07,371 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:45:07,372 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2024-11-22 21:45:08,658 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:45:08,812 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:45:08,812 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-misc-1.wvr.c [2024-11-22 21:45:08,820 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bb4abd7/3b62d343ba0e4e6aa718cd2ddd224a00/FLAGcc65654db [2024-11-22 21:45:09,215 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bb4abd7/3b62d343ba0e4e6aa718cd2ddd224a00 [2024-11-22 21:45:09,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:45:09,218 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:45:09,227 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:45:09,228 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:45:09,232 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:45:09,232 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,233 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ac50423 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09, skipping insertion in model container [2024-11-22 21:45:09,233 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,249 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:45:09,396 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:45:09,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:45:09,405 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:45:09,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:45:09,441 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:45:09,442 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09 WrapperNode [2024-11-22 21:45:09,442 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:45:09,443 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:45:09,443 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:45:09,443 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:45:09,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,458 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,483 INFO L138 Inliner]: procedures = 22, calls = 32, calls flagged for inlining = 18, calls inlined = 32, statements flattened = 279 [2024-11-22 21:45:09,483 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:45:09,483 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:45:09,484 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:45:09,484 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:45:09,492 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,496 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,507 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-22 21:45:09,507 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,508 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,514 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,518 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,519 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,522 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:45:09,523 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:45:09,523 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:45:09,523 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:45:09,523 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (1/1) ... [2024-11-22 21:45:09,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:45:09,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:09,566 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:45:09,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:45:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:45:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:45:09,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:45:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:45:09,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:45:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:45:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:45:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:45:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:45:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:45:09,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:45:09,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:45:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:45:09,614 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:45:09,616 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:45:09,697 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:45:09,698 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:45:10,104 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:45:10,104 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:45:10,420 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:45:10,421 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 21:45:10,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:45:10 BoogieIcfgContainer [2024-11-22 21:45:10,421 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:45:10,422 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:45:10,422 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:45:10,426 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:45:10,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:45:09" (1/3) ... [2024-11-22 21:45:10,427 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3898ce5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:45:10, skipping insertion in model container [2024-11-22 21:45:10,427 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:45:09" (2/3) ... [2024-11-22 21:45:10,428 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3898ce5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:45:10, skipping insertion in model container [2024-11-22 21:45:10,428 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:45:10" (3/3) ... [2024-11-22 21:45:10,430 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-1.wvr.c [2024-11-22 21:45:10,444 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:45:10,444 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-22 21:45:10,444 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:45:10,501 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 21:45:10,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 49 transitions, 112 flow [2024-11-22 21:45:10,554 INFO L124 PetriNetUnfolderBase]: 5/47 cut-off events. [2024-11-22 21:45:10,555 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:45:10,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 47 events. 5/47 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 114 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-11-22 21:45:10,558 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 49 transitions, 112 flow [2024-11-22 21:45:10,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 48 places, 46 transitions, 104 flow [2024-11-22 21:45:10,571 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:45:10,578 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;@210fdfe2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:45:10,579 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-22 21:45:10,582 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:45:10,584 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:45:10,584 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:45:10,584 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:10,585 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:45:10,585 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:10,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:10,589 INFO L85 PathProgramCache]: Analyzing trace with hash 977384, now seen corresponding path program 1 times [2024-11-22 21:45:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:10,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82040442] [2024-11-22 21:45:10,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:10,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:10,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:10,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:10,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82040442] [2024-11-22 21:45:10,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82040442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:10,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:10,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:45:10,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78433285] [2024-11-22 21:45:10,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:10,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:45:10,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:10,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:45:10,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:45:10,856 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:10,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:10,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:10,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:10,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:11,011 INFO L124 PetriNetUnfolderBase]: 220/507 cut-off events. [2024-11-22 21:45:11,011 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-22 21:45:11,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 875 conditions, 507 events. 220/507 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2746 event pairs, 130 based on Foata normal form. 1/402 useless extension candidates. Maximal degree in co-relation 806. Up to 338 conditions per place. [2024-11-22 21:45:11,019 INFO L140 encePairwiseOnDemand]: 45/49 looper letters, 23 selfloop transitions, 2 changer transitions 0/43 dead transitions. [2024-11-22 21:45:11,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 43 transitions, 148 flow [2024-11-22 21:45:11,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:45:11,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:45:11,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-22 21:45:11,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-11-22 21:45:11,030 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 3 states and 90 transitions. [2024-11-22 21:45:11,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 43 transitions, 148 flow [2024-11-22 21:45:11,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 43 transitions, 140 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:11,035 INFO L231 Difference]: Finished difference. Result has 43 places, 43 transitions, 94 flow [2024-11-22 21:45:11,037 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=43, PETRI_TRANSITIONS=43} [2024-11-22 21:45:11,041 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2024-11-22 21:45:11,041 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 43 transitions, 94 flow [2024-11-22 21:45:11,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:11,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:11,042 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:45:11,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:45:11,042 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:11,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:11,043 INFO L85 PathProgramCache]: Analyzing trace with hash 977385, now seen corresponding path program 1 times [2024-11-22 21:45:11,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:11,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096011267] [2024-11-22 21:45:11,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:11,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:11,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:11,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096011267] [2024-11-22 21:45:11,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096011267] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:11,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:11,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:45:11,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943582124] [2024-11-22 21:45:11,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:11,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:45:11,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:11,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:45:11,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:45:11,448 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:11,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 43 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:11,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:11,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:11,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:11,625 INFO L124 PetriNetUnfolderBase]: 221/510 cut-off events. [2024-11-22 21:45:11,626 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:45:11,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 868 conditions, 510 events. 221/510 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2770 event pairs, 130 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 846. Up to 343 conditions per place. [2024-11-22 21:45:11,631 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 25 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-11-22 21:45:11,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 46 transitions, 160 flow [2024-11-22 21:45:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:45:11,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:45:11,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-22 21:45:11,634 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-11-22 21:45:11,634 INFO L175 Difference]: Start difference. First operand has 43 places, 43 transitions, 94 flow. Second operand 4 states and 114 transitions. [2024-11-22 21:45:11,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 46 transitions, 160 flow [2024-11-22 21:45:11,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 46 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:45:11,637 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 117 flow [2024-11-22 21:45:11,639 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=117, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-22 21:45:11,640 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2024-11-22 21:45:11,640 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 117 flow [2024-11-22 21:45:11,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:11,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:11,640 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:45:11,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:45:11,641 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:11,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:11,641 INFO L85 PathProgramCache]: Analyzing trace with hash 939297785, now seen corresponding path program 1 times [2024-11-22 21:45:11,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:11,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001565538] [2024-11-22 21:45:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:11,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:11,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:11,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:11,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001565538] [2024-11-22 21:45:11,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001565538] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:11,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841959500] [2024-11-22 21:45:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:11,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:11,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:11,856 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:11,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:45:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:11,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:45:11,915 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:11,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:45:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:12,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:12,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841959500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:12,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:12,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:45:12,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986496083] [2024-11-22 21:45:12,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:12,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:45:12,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:12,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:45:12,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:45:12,390 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:12,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 117 flow. Second operand has 11 states, 11 states have (on average 22.363636363636363) internal successors, (246), 11 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:12,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:12,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:12,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:12,692 INFO L124 PetriNetUnfolderBase]: 222/512 cut-off events. [2024-11-22 21:45:12,692 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:45:12,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 512 events. 222/512 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2772 event pairs, 130 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 853. Up to 340 conditions per place. [2024-11-22 21:45:12,697 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 21 selfloop transitions, 10 changer transitions 0/48 dead transitions. [2024-11-22 21:45:12,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 187 flow [2024-11-22 21:45:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:45:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:45:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-11-22 21:45:12,703 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5127551020408163 [2024-11-22 21:45:12,703 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 117 flow. Second operand 8 states and 201 transitions. [2024-11-22 21:45:12,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 187 flow [2024-11-22 21:45:12,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:45:12,706 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 142 flow [2024-11-22 21:45:12,707 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=142, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-11-22 21:45:12,708 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2024-11-22 21:45:12,708 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 142 flow [2024-11-22 21:45:12,709 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 22.363636363636363) internal successors, (246), 11 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:12,709 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:12,709 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:45:12,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:45:12,913 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:12,914 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:12,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:12,915 INFO L85 PathProgramCache]: Analyzing trace with hash -943354579, now seen corresponding path program 1 times [2024-11-22 21:45:12,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:12,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042152175] [2024-11-22 21:45:12,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:12,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:12,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:12,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:12,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042152175] [2024-11-22 21:45:12,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042152175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:12,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:12,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:45:12,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635983559] [2024-11-22 21:45:12,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:12,984 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:45:12,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:12,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:45:12,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:45:13,000 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:13,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 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) [2024-11-22 21:45:13,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:13,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:13,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:13,121 INFO L124 PetriNetUnfolderBase]: 274/604 cut-off events. [2024-11-22 21:45:13,122 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:45:13,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1071 conditions, 604 events. 274/604 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 3165 event pairs, 157 based on Foata normal form. 0/458 useless extension candidates. Maximal degree in co-relation 827. Up to 316 conditions per place. [2024-11-22 21:45:13,125 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 40 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-22 21:45:13,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 256 flow [2024-11-22 21:45:13,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:45:13,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:45:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-11-22 21:45:13,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-11-22 21:45:13,128 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 142 flow. Second operand 4 states and 126 transitions. [2024-11-22 21:45:13,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 256 flow [2024-11-22 21:45:13,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 60 transitions, 214 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-22 21:45:13,130 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 119 flow [2024-11-22 21:45:13,130 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-11-22 21:45:13,131 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 1 predicate places. [2024-11-22 21:45:13,131 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 119 flow [2024-11-22 21:45:13,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 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) [2024-11-22 21:45:13,132 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:13,132 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:13,132 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:45:13,133 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:13,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:13,134 INFO L85 PathProgramCache]: Analyzing trace with hash 912519453, now seen corresponding path program 1 times [2024-11-22 21:45:13,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:13,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883727125] [2024-11-22 21:45:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:13,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:13,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:13,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883727125] [2024-11-22 21:45:13,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883727125] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:13,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:13,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:45:13,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704042878] [2024-11-22 21:45:13,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:13,175 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:45:13,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:13,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:45:13,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:45:13,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 49 [2024-11-22 21:45:13,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 119 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:13,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:13,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 49 [2024-11-22 21:45:13,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:13,268 INFO L124 PetriNetUnfolderBase]: 246/497 cut-off events. [2024-11-22 21:45:13,268 INFO L125 PetriNetUnfolderBase]: For 84/99 co-relation queries the response was YES. [2024-11-22 21:45:13,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 990 conditions, 497 events. 246/497 cut-off events. For 84/99 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2266 event pairs, 135 based on Foata normal form. 0/456 useless extension candidates. Maximal degree in co-relation 648. Up to 379 conditions per place. [2024-11-22 21:45:13,270 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 28 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-11-22 21:45:13,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 171 flow [2024-11-22 21:45:13,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:45:13,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:45:13,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-11-22 21:45:13,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-11-22 21:45:13,272 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 119 flow. Second operand 4 states and 91 transitions. [2024-11-22 21:45:13,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 171 flow [2024-11-22 21:45:13,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:45:13,274 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 112 flow [2024-11-22 21:45:13,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-11-22 21:45:13,275 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2024-11-22 21:45:13,275 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 112 flow [2024-11-22 21:45:13,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:13,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:13,275 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:13,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:45:13,275 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:13,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:13,276 INFO L85 PathProgramCache]: Analyzing trace with hash 912519454, now seen corresponding path program 1 times [2024-11-22 21:45:13,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:13,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843121805] [2024-11-22 21:45:13,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:13,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:13,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:13,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:13,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843121805] [2024-11-22 21:45:13,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843121805] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:13,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866203794] [2024-11-22 21:45:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:13,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:13,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:13,420 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:13,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:45:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:13,493 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-22 21:45:13,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:13,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:13,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-22 21:45:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:13,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866203794] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:13,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:13,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-22 21:45:13,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107819095] [2024-11-22 21:45:13,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:13,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 21:45:13,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:13,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 21:45:13,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:45:13,724 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-11-22 21:45:13,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 112 flow. Second operand has 9 states, 9 states have (on average 20.666666666666668) internal successors, (186), 9 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:13,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:13,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-11-22 21:45:13,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:13,927 INFO L124 PetriNetUnfolderBase]: 410/762 cut-off events. [2024-11-22 21:45:13,927 INFO L125 PetriNetUnfolderBase]: For 111/137 co-relation queries the response was YES. [2024-11-22 21:45:13,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 762 events. 410/762 cut-off events. For 111/137 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3609 event pairs, 167 based on Foata normal form. 0/675 useless extension candidates. Maximal degree in co-relation 1282. Up to 266 conditions per place. [2024-11-22 21:45:13,930 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 56 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-11-22 21:45:13,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 72 transitions, 307 flow [2024-11-22 21:45:13,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:45:13,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:45:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-11-22 21:45:13,932 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-11-22 21:45:13,932 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 112 flow. Second operand 6 states and 179 transitions. [2024-11-22 21:45:13,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 72 transitions, 307 flow [2024-11-22 21:45:13,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 72 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:45:13,933 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 135 flow [2024-11-22 21:45:13,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=135, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-11-22 21:45:13,934 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 0 predicate places. [2024-11-22 21:45:13,934 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 135 flow [2024-11-22 21:45:13,934 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 20.666666666666668) internal successors, (186), 9 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:13,934 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:13,934 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:13,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:45:14,135 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,SelfDestructingSolverStorable5 [2024-11-22 21:45:14,136 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:14,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:14,137 INFO L85 PathProgramCache]: Analyzing trace with hash -325638019, now seen corresponding path program 1 times [2024-11-22 21:45:14,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:14,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304677704] [2024-11-22 21:45:14,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:14,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:14,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:14,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304677704] [2024-11-22 21:45:14,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304677704] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:14,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:14,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:45:14,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479996517] [2024-11-22 21:45:14,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:14,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:45:14,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:14,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:45:14,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:45:14,193 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:14,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:14,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:14,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:14,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:14,287 INFO L124 PetriNetUnfolderBase]: 418/751 cut-off events. [2024-11-22 21:45:14,287 INFO L125 PetriNetUnfolderBase]: For 221/246 co-relation queries the response was YES. [2024-11-22 21:45:14,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1655 conditions, 751 events. 418/751 cut-off events. For 221/246 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3374 event pairs, 250 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 1556. Up to 553 conditions per place. [2024-11-22 21:45:14,291 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 46 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-22 21:45:14,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 58 transitions, 284 flow [2024-11-22 21:45:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:45:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:45:14,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-11-22 21:45:14,292 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6479591836734694 [2024-11-22 21:45:14,292 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 135 flow. Second operand 4 states and 127 transitions. [2024-11-22 21:45:14,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 58 transitions, 284 flow [2024-11-22 21:45:14,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 58 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:45:14,294 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 148 flow [2024-11-22 21:45:14,294 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=148, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-11-22 21:45:14,294 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 3 predicate places. [2024-11-22 21:45:14,294 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 148 flow [2024-11-22 21:45:14,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.5) internal successors, (90), 4 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:14,295 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:14,295 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:14,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 21:45:14,295 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:14,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:14,295 INFO L85 PathProgramCache]: Analyzing trace with hash 757878893, now seen corresponding path program 1 times [2024-11-22 21:45:14,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:14,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746638119] [2024-11-22 21:45:14,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:14,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:14,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:14,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746638119] [2024-11-22 21:45:14,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746638119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:14,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336719291] [2024-11-22 21:45:14,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:14,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:14,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:14,409 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:14,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:45:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:14,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-22 21:45:14,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:14,547 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:14,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-22 21:45:14,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:14,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336719291] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:14,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:14,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-22 21:45:14,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591245708] [2024-11-22 21:45:14,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:14,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 21:45:14,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:14,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 21:45:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:45:14,715 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 49 [2024-11-22 21:45:14,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 21.333333333333332) internal successors, (192), 9 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:14,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:14,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 49 [2024-11-22 21:45:14,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:14,948 INFO L124 PetriNetUnfolderBase]: 638/1070 cut-off events. [2024-11-22 21:45:14,949 INFO L125 PetriNetUnfolderBase]: For 526/592 co-relation queries the response was YES. [2024-11-22 21:45:14,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2562 conditions, 1070 events. 638/1070 cut-off events. For 526/592 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4801 event pairs, 247 based on Foata normal form. 0/918 useless extension candidates. Maximal degree in co-relation 2454. Up to 467 conditions per place. [2024-11-22 21:45:14,954 INFO L140 encePairwiseOnDemand]: 41/49 looper letters, 62 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2024-11-22 21:45:14,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 76 transitions, 393 flow [2024-11-22 21:45:14,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:45:14,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:45:14,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-11-22 21:45:14,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-11-22 21:45:14,955 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 148 flow. Second operand 6 states and 178 transitions. [2024-11-22 21:45:14,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 76 transitions, 393 flow [2024-11-22 21:45:14,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 76 transitions, 390 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:45:14,957 INFO L231 Difference]: Finished difference. Result has 55 places, 44 transitions, 173 flow [2024-11-22 21:45:14,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=173, PETRI_PLACES=55, PETRI_TRANSITIONS=44} [2024-11-22 21:45:14,958 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 7 predicate places. [2024-11-22 21:45:14,958 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 44 transitions, 173 flow [2024-11-22 21:45:14,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.333333333333332) internal successors, (192), 9 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:14,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:14,959 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:14,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 21:45:15,159 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:15,160 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:15,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:15,161 INFO L85 PathProgramCache]: Analyzing trace with hash -80299091, now seen corresponding path program 1 times [2024-11-22 21:45:15,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:15,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681228963] [2024-11-22 21:45:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:15,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:15,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:15,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:15,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:15,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681228963] [2024-11-22 21:45:15,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681228963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:15,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045842832] [2024-11-22 21:45:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:15,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:15,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:15,229 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:15,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:45:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:15,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 21:45:15,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:15,343 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:15,344 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:15,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045842832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:15,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:15,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-11-22 21:45:15,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348306902] [2024-11-22 21:45:15,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:15,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:45:15,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:15,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:45:15,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:45:15,508 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:15,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 44 transitions, 173 flow. Second operand has 14 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:15,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:15,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:15,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:15,826 INFO L124 PetriNetUnfolderBase]: 1085/1894 cut-off events. [2024-11-22 21:45:15,826 INFO L125 PetriNetUnfolderBase]: For 1090/1132 co-relation queries the response was YES. [2024-11-22 21:45:15,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4857 conditions, 1894 events. 1085/1894 cut-off events. For 1090/1132 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9890 event pairs, 646 based on Foata normal form. 26/1735 useless extension candidates. Maximal degree in co-relation 3928. Up to 873 conditions per place. [2024-11-22 21:45:15,835 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 93 selfloop transitions, 10 changer transitions 0/109 dead transitions. [2024-11-22 21:45:15,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 599 flow [2024-11-22 21:45:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:45:15,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:45:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 280 transitions. [2024-11-22 21:45:15,836 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-11-22 21:45:15,836 INFO L175 Difference]: Start difference. First operand has 55 places, 44 transitions, 173 flow. Second operand 9 states and 280 transitions. [2024-11-22 21:45:15,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 599 flow [2024-11-22 21:45:15,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 593 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:45:15,842 INFO L231 Difference]: Finished difference. Result has 63 places, 47 transitions, 215 flow [2024-11-22 21:45:15,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=215, PETRI_PLACES=63, PETRI_TRANSITIONS=47} [2024-11-22 21:45:15,843 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 15 predicate places. [2024-11-22 21:45:15,844 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 47 transitions, 215 flow [2024-11-22 21:45:15,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.071428571428573) internal successors, (323), 14 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:15,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:15,844 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:15,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 21:45:16,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:16,049 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:16,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:16,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1249149805, now seen corresponding path program 1 times [2024-11-22 21:45:16,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:16,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801960331] [2024-11-22 21:45:16,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:16,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:16,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:16,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:16,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801960331] [2024-11-22 21:45:16,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801960331] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:45:16,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:45:16,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:45:16,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110386277] [2024-11-22 21:45:16,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:16,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:45:16,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:16,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:45:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:45:16,141 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-11-22 21:45:16,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 47 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:16,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:16,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-11-22 21:45:16,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:16,462 INFO L124 PetriNetUnfolderBase]: 1410/2415 cut-off events. [2024-11-22 21:45:16,462 INFO L125 PetriNetUnfolderBase]: For 2167/2316 co-relation queries the response was YES. [2024-11-22 21:45:16,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6570 conditions, 2415 events. 1410/2415 cut-off events. For 2167/2316 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13228 event pairs, 169 based on Foata normal form. 3/2158 useless extension candidates. Maximal degree in co-relation 5474. Up to 1227 conditions per place. [2024-11-22 21:45:16,473 INFO L140 encePairwiseOnDemand]: 39/49 looper letters, 76 selfloop transitions, 17 changer transitions 4/104 dead transitions. [2024-11-22 21:45:16,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 104 transitions, 642 flow [2024-11-22 21:45:16,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:45:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:45:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-11-22 21:45:16,474 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.746938775510204 [2024-11-22 21:45:16,474 INFO L175 Difference]: Start difference. First operand has 63 places, 47 transitions, 215 flow. Second operand 5 states and 183 transitions. [2024-11-22 21:45:16,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 104 transitions, 642 flow [2024-11-22 21:45:16,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 104 transitions, 634 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:45:16,479 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 337 flow [2024-11-22 21:45:16,479 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=337, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2024-11-22 21:45:16,480 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 19 predicate places. [2024-11-22 21:45:16,480 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 337 flow [2024-11-22 21:45:16,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:16,480 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:16,480 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:16,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:45:16,480 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:16,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:16,481 INFO L85 PathProgramCache]: Analyzing trace with hash -162723395, now seen corresponding path program 2 times [2024-11-22 21:45:16,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:16,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928604509] [2024-11-22 21:45:16,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:16,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:16,493 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:16,493 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:45:16,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928604509] [2024-11-22 21:45:16,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928604509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912497755] [2024-11-22 21:45:16,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:16,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:16,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:16,625 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:16,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:45:16,702 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:16,703 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:16,704 INFO L255 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:45:16,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:45:16,818 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:16,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2024-11-22 21:45:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:45:17,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912497755] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:17,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:17,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 6] total 14 [2024-11-22 21:45:17,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342178227] [2024-11-22 21:45:17,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:17,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 21:45:17,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:17,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 21:45:17,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:45:17,331 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-22 21:45:17,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 337 flow. Second operand has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:17,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:17,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-22 21:45:17,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:17,799 INFO L124 PetriNetUnfolderBase]: 1598/2630 cut-off events. [2024-11-22 21:45:17,799 INFO L125 PetriNetUnfolderBase]: For 4040/4135 co-relation queries the response was YES. [2024-11-22 21:45:17,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8902 conditions, 2630 events. 1598/2630 cut-off events. For 4040/4135 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13984 event pairs, 183 based on Foata normal form. 48/2676 useless extension candidates. Maximal degree in co-relation 7453. Up to 1108 conditions per place. [2024-11-22 21:45:17,815 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 106 selfloop transitions, 16 changer transitions 2/129 dead transitions. [2024-11-22 21:45:17,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 129 transitions, 936 flow [2024-11-22 21:45:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:45:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:45:17,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-11-22 21:45:17,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5487528344671202 [2024-11-22 21:45:17,817 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 337 flow. Second operand 9 states and 242 transitions. [2024-11-22 21:45:17,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 129 transitions, 936 flow [2024-11-22 21:45:17,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 129 transitions, 850 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-22 21:45:17,874 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 396 flow [2024-11-22 21:45:17,874 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=287, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=396, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-11-22 21:45:17,874 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 22 predicate places. [2024-11-22 21:45:17,875 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 396 flow [2024-11-22 21:45:17,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.375) internal successors, (326), 16 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:17,875 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:17,875 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:17,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:45:18,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-22 21:45:18,080 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:18,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:18,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1517652309, now seen corresponding path program 1 times [2024-11-22 21:45:18,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:18,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950812263] [2024-11-22 21:45:18,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:18,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:18,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:18,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:18,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:18,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950812263] [2024-11-22 21:45:18,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950812263] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:18,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485826848] [2024-11-22 21:45:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:18,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:18,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:18,142 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:18,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:45:18,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:18,195 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-22 21:45:18,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:18,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:18,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:18,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485826848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:18,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:18,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2024-11-22 21:45:18,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375200176] [2024-11-22 21:45:18,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:18,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:45:18,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:45:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:45:18,446 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:18,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 396 flow. Second operand has 14 states, 14 states have (on average 23.5) internal successors, (329), 14 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:18,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:18,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:18,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:18,857 INFO L124 PetriNetUnfolderBase]: 1348/2258 cut-off events. [2024-11-22 21:45:18,857 INFO L125 PetriNetUnfolderBase]: For 2983/2995 co-relation queries the response was YES. [2024-11-22 21:45:18,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7633 conditions, 2258 events. 1348/2258 cut-off events. For 2983/2995 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 11419 event pairs, 715 based on Foata normal form. 41/2293 useless extension candidates. Maximal degree in co-relation 5770. Up to 1476 conditions per place. [2024-11-22 21:45:18,869 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 120 selfloop transitions, 10 changer transitions 2/139 dead transitions. [2024-11-22 21:45:18,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 139 transitions, 1060 flow [2024-11-22 21:45:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:45:18,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:45:18,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 273 transitions. [2024-11-22 21:45:18,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-22 21:45:18,870 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 396 flow. Second operand 9 states and 273 transitions. [2024-11-22 21:45:18,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 139 transitions, 1060 flow [2024-11-22 21:45:18,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 139 transitions, 1030 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:18,875 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 436 flow [2024-11-22 21:45:18,875 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=436, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2024-11-22 21:45:18,875 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 29 predicate places. [2024-11-22 21:45:18,875 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 436 flow [2024-11-22 21:45:18,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 23.5) internal successors, (329), 14 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:18,875 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:18,876 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:18,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:45:19,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:19,076 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:19,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:19,076 INFO L85 PathProgramCache]: Analyzing trace with hash 876970171, now seen corresponding path program 2 times [2024-11-22 21:45:19,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:19,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345397158] [2024-11-22 21:45:19,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:19,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:19,095 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:19,096 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:45:19,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:19,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345397158] [2024-11-22 21:45:19,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345397158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:19,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539838231] [2024-11-22 21:45:19,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:19,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:19,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:19,263 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:19,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:45:19,334 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:19,334 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:19,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 21:45:19,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:19,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:45:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:45:19,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:45:19,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539838231] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:19,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:19,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2024-11-22 21:45:19,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333193957] [2024-11-22 21:45:19,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:19,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:45:19,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:19,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:45:19,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:45:20,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 49 [2024-11-22 21:45:20,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 436 flow. Second operand has 15 states, 15 states have (on average 20.8) internal successors, (312), 15 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:20,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:20,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 49 [2024-11-22 21:45:20,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:20,681 INFO L124 PetriNetUnfolderBase]: 1348/2212 cut-off events. [2024-11-22 21:45:20,681 INFO L125 PetriNetUnfolderBase]: For 2961/2973 co-relation queries the response was YES. [2024-11-22 21:45:20,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7933 conditions, 2212 events. 1348/2212 cut-off events. For 2961/2973 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 10743 event pairs, 158 based on Foata normal form. 63/2273 useless extension candidates. Maximal degree in co-relation 5930. Up to 779 conditions per place. [2024-11-22 21:45:20,699 INFO L140 encePairwiseOnDemand]: 44/49 looper letters, 117 selfloop transitions, 8 changer transitions 0/131 dead transitions. [2024-11-22 21:45:20,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 131 transitions, 1077 flow [2024-11-22 21:45:20,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:45:20,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:45:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-11-22 21:45:20,705 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5539358600583091 [2024-11-22 21:45:20,705 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 436 flow. Second operand 7 states and 190 transitions. [2024-11-22 21:45:20,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 131 transitions, 1077 flow [2024-11-22 21:45:20,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 131 transitions, 1066 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:20,714 INFO L231 Difference]: Finished difference. Result has 78 places, 70 transitions, 441 flow [2024-11-22 21:45:20,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=441, PETRI_PLACES=78, PETRI_TRANSITIONS=70} [2024-11-22 21:45:20,719 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 30 predicate places. [2024-11-22 21:45:20,720 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 70 transitions, 441 flow [2024-11-22 21:45:20,720 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 20.8) internal successors, (312), 15 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:20,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:20,721 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:20,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 21:45:20,924 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:20,925 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:20,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:20,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1973268354, now seen corresponding path program 1 times [2024-11-22 21:45:20,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:20,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033120198] [2024-11-22 21:45:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:20,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:21,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:21,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033120198] [2024-11-22 21:45:21,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033120198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:21,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510629495] [2024-11-22 21:45:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:21,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:21,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:21,061 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:21,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:45:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:21,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:45:21,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:21,161 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:21,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510629495] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:21,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:45:21,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2024-11-22 21:45:21,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705756008] [2024-11-22 21:45:21,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:21,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:45:21,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:21,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:45:21,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:45:21,209 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:21,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 70 transitions, 441 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:21,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:21,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:21,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:21,434 INFO L124 PetriNetUnfolderBase]: 1264/2074 cut-off events. [2024-11-22 21:45:21,435 INFO L125 PetriNetUnfolderBase]: For 3384/3392 co-relation queries the response was YES. [2024-11-22 21:45:21,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7479 conditions, 2074 events. 1264/2074 cut-off events. For 3384/3392 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9834 event pairs, 662 based on Foata normal form. 60/2132 useless extension candidates. Maximal degree in co-relation 5670. Up to 1621 conditions per place. [2024-11-22 21:45:21,446 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 75 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2024-11-22 21:45:21,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 89 transitions, 742 flow [2024-11-22 21:45:21,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:45:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:45:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-22 21:45:21,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2024-11-22 21:45:21,448 INFO L175 Difference]: Start difference. First operand has 78 places, 70 transitions, 441 flow. Second operand 5 states and 143 transitions. [2024-11-22 21:45:21,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 89 transitions, 742 flow [2024-11-22 21:45:21,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 724 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:21,452 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 439 flow [2024-11-22 21:45:21,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=439, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2024-11-22 21:45:21,453 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 30 predicate places. [2024-11-22 21:45:21,453 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 439 flow [2024-11-22 21:45:21,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:21,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:21,453 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:21,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 21:45:21,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-22 21:45:21,658 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:21,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:21,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1228922021, now seen corresponding path program 1 times [2024-11-22 21:45:21,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:21,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486091775] [2024-11-22 21:45:21,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:21,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486091775] [2024-11-22 21:45:21,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486091775] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:21,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737192924] [2024-11-22 21:45:21,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:21,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:21,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:21,746 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:21,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:45:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:21,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:45:21,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:21,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:21,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:21,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737192924] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:21,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:45:21,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2024-11-22 21:45:21,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470505463] [2024-11-22 21:45:21,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:45:21,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:45:21,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:21,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:45:21,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-22 21:45:21,879 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:21,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 439 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:21,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:21,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:21,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:22,028 INFO L124 PetriNetUnfolderBase]: 1105/1780 cut-off events. [2024-11-22 21:45:22,029 INFO L125 PetriNetUnfolderBase]: For 2795/2795 co-relation queries the response was YES. [2024-11-22 21:45:22,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6459 conditions, 1780 events. 1105/1780 cut-off events. For 2795/2795 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8101 event pairs, 532 based on Foata normal form. 48/1812 useless extension candidates. Maximal degree in co-relation 5015. Up to 1363 conditions per place. [2024-11-22 21:45:22,039 INFO L140 encePairwiseOnDemand]: 43/49 looper letters, 68 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2024-11-22 21:45:22,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 641 flow [2024-11-22 21:45:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:45:22,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:45:22,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-11-22 21:45:22,041 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5877551020408164 [2024-11-22 21:45:22,041 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 439 flow. Second operand 5 states and 144 transitions. [2024-11-22 21:45:22,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 641 flow [2024-11-22 21:45:22,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 615 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-22 21:45:22,048 INFO L231 Difference]: Finished difference. Result has 74 places, 62 transitions, 367 flow [2024-11-22 21:45:22,048 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=367, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2024-11-22 21:45:22,049 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 26 predicate places. [2024-11-22 21:45:22,049 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 367 flow [2024-11-22 21:45:22,049 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:22,049 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:22,050 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] [2024-11-22 21:45:22,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-22 21:45:22,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-22 21:45:22,251 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:22,251 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:22,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1341747170, now seen corresponding path program 1 times [2024-11-22 21:45:22,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:22,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345641373] [2024-11-22 21:45:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:22,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:22,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:22,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345641373] [2024-11-22 21:45:22,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345641373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:22,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858571659] [2024-11-22 21:45:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:22,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:22,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:22,830 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:22,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:45:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:22,894 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-22 21:45:22,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:22,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:45:23,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:45:23,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:23,126 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:23,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858571659] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:23,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:23,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 9] total 25 [2024-11-22 21:45:23,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145295237] [2024-11-22 21:45:23,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:23,247 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 21:45:23,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:23,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 21:45:23,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-11-22 21:45:24,369 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-11-22 21:45:24,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 367 flow. Second operand has 25 states, 25 states have (on average 24.28) internal successors, (607), 25 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:24,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:24,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-11-22 21:45:24,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:25,100 INFO L124 PetriNetUnfolderBase]: 1467/2436 cut-off events. [2024-11-22 21:45:25,100 INFO L125 PetriNetUnfolderBase]: For 3270/3270 co-relation queries the response was YES. [2024-11-22 21:45:25,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8753 conditions, 2436 events. 1467/2436 cut-off events. For 3270/3270 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 11823 event pairs, 70 based on Foata normal form. 2/2426 useless extension candidates. Maximal degree in co-relation 7232. Up to 948 conditions per place. [2024-11-22 21:45:25,113 INFO L140 encePairwiseOnDemand]: 33/49 looper letters, 117 selfloop transitions, 62 changer transitions 3/190 dead transitions. [2024-11-22 21:45:25,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 190 transitions, 1408 flow [2024-11-22 21:45:25,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 21:45:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-22 21:45:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 481 transitions. [2024-11-22 21:45:25,117 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.654421768707483 [2024-11-22 21:45:25,117 INFO L175 Difference]: Start difference. First operand has 74 places, 62 transitions, 367 flow. Second operand 15 states and 481 transitions. [2024-11-22 21:45:25,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 190 transitions, 1408 flow [2024-11-22 21:45:25,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 190 transitions, 1370 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:25,125 INFO L231 Difference]: Finished difference. Result has 93 places, 108 transitions, 955 flow [2024-11-22 21:45:25,125 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=955, PETRI_PLACES=93, PETRI_TRANSITIONS=108} [2024-11-22 21:45:25,125 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 45 predicate places. [2024-11-22 21:45:25,125 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 108 transitions, 955 flow [2024-11-22 21:45:25,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 24.28) internal successors, (607), 25 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:25,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:25,126 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] [2024-11-22 21:45:25,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 21:45:25,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-22 21:45:25,326 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:25,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:25,327 INFO L85 PathProgramCache]: Analyzing trace with hash -773351910, now seen corresponding path program 2 times [2024-11-22 21:45:25,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:25,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622128893] [2024-11-22 21:45:25,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:25,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:25,358 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:25,358 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:25,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622128893] [2024-11-22 21:45:25,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622128893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:25,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699895394] [2024-11-22 21:45:25,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:25,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:25,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:25,944 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:25,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:45:26,009 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:26,010 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:26,011 INFO L255 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-22 21:45:26,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:26,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:45:26,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:45:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:26,250 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:26,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:26,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699895394] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:26,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:26,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 25 [2024-11-22 21:45:26,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882857191] [2024-11-22 21:45:26,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:26,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 21:45:26,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:26,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 21:45:26,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2024-11-22 21:45:27,442 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:27,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 108 transitions, 955 flow. Second operand has 25 states, 25 states have (on average 23.28) internal successors, (582), 25 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:27,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:27,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:27,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:28,366 INFO L124 PetriNetUnfolderBase]: 2354/3749 cut-off events. [2024-11-22 21:45:28,366 INFO L125 PetriNetUnfolderBase]: For 9851/9851 co-relation queries the response was YES. [2024-11-22 21:45:28,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16588 conditions, 3749 events. 2354/3749 cut-off events. For 9851/9851 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 18546 event pairs, 342 based on Foata normal form. 2/3749 useless extension candidates. Maximal degree in co-relation 14216. Up to 2087 conditions per place. [2024-11-22 21:45:28,386 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 199 selfloop transitions, 110 changer transitions 5/320 dead transitions. [2024-11-22 21:45:28,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 320 transitions, 3229 flow [2024-11-22 21:45:28,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 21:45:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-22 21:45:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 620 transitions. [2024-11-22 21:45:28,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-11-22 21:45:28,391 INFO L175 Difference]: Start difference. First operand has 93 places, 108 transitions, 955 flow. Second operand 20 states and 620 transitions. [2024-11-22 21:45:28,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 320 transitions, 3229 flow [2024-11-22 21:45:28,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 320 transitions, 3091 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-11-22 21:45:28,417 INFO L231 Difference]: Finished difference. Result has 113 places, 209 transitions, 2330 flow [2024-11-22 21:45:28,418 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=875, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2330, PETRI_PLACES=113, PETRI_TRANSITIONS=209} [2024-11-22 21:45:28,418 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 65 predicate places. [2024-11-22 21:45:28,418 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 209 transitions, 2330 flow [2024-11-22 21:45:28,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 23.28) internal successors, (582), 25 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:28,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:28,419 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] [2024-11-22 21:45:28,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 21:45:28,622 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 21:45:28,623 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:28,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:28,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1624158724, now seen corresponding path program 1 times [2024-11-22 21:45:28,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:28,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865892040] [2024-11-22 21:45:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:28,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:29,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:29,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865892040] [2024-11-22 21:45:29,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865892040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:29,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070807236] [2024-11-22 21:45:29,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:29,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:29,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:29,020 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:29,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:45:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:29,083 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-22 21:45:29,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:29,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:45:29,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:45:29,305 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:29,306 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:29,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070807236] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:29,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:29,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 23 [2024-11-22 21:45:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309494401] [2024-11-22 21:45:29,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:29,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-22 21:45:29,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-22 21:45:29,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2024-11-22 21:45:30,334 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:30,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 209 transitions, 2330 flow. Second operand has 23 states, 23 states have (on average 23.608695652173914) internal successors, (543), 23 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:30,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:30,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:30,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:31,285 INFO L124 PetriNetUnfolderBase]: 2665/4275 cut-off events. [2024-11-22 21:45:31,285 INFO L125 PetriNetUnfolderBase]: For 15574/15580 co-relation queries the response was YES. [2024-11-22 21:45:31,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20422 conditions, 4275 events. 2665/4275 cut-off events. For 15574/15580 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 21894 event pairs, 187 based on Foata normal form. 2/4248 useless extension candidates. Maximal degree in co-relation 18858. Up to 1779 conditions per place. [2024-11-22 21:45:31,310 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 211 selfloop transitions, 118 changer transitions 15/349 dead transitions. [2024-11-22 21:45:31,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 349 transitions, 3891 flow [2024-11-22 21:45:31,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-22 21:45:31,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-22 21:45:31,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 540 transitions. [2024-11-22 21:45:31,313 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6482593037214885 [2024-11-22 21:45:31,313 INFO L175 Difference]: Start difference. First operand has 113 places, 209 transitions, 2330 flow. Second operand 17 states and 540 transitions. [2024-11-22 21:45:31,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 349 transitions, 3891 flow [2024-11-22 21:45:31,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 349 transitions, 3750 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-11-22 21:45:31,377 INFO L231 Difference]: Finished difference. Result has 131 places, 229 transitions, 2787 flow [2024-11-22 21:45:31,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2787, PETRI_PLACES=131, PETRI_TRANSITIONS=229} [2024-11-22 21:45:31,378 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 83 predicate places. [2024-11-22 21:45:31,378 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 229 transitions, 2787 flow [2024-11-22 21:45:31,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 23.608695652173914) internal successors, (543), 23 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:31,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:31,378 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] [2024-11-22 21:45:31,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 21:45:31,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-22 21:45:31,579 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:31,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:31,580 INFO L85 PathProgramCache]: Analyzing trace with hash 344654838, now seen corresponding path program 1 times [2024-11-22 21:45:31,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:31,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658329486] [2024-11-22 21:45:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:31,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:31,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:31,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658329486] [2024-11-22 21:45:31,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658329486] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:31,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52103033] [2024-11-22 21:45:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:45:31,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:31,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:31,915 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:31,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:45:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:31,975 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-22 21:45:31,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:31,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:45:32,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:45:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:32,193 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:32,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52103033] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:32,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:32,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2024-11-22 21:45:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963507386] [2024-11-22 21:45:32,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:32,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:45:32,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:32,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:45:32,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:45:32,723 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-11-22 21:45:32,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 229 transitions, 2787 flow. Second operand has 18 states, 18 states have (on average 25.0) internal successors, (450), 18 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:32,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:32,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-11-22 21:45:32,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:33,497 INFO L124 PetriNetUnfolderBase]: 2803/4547 cut-off events. [2024-11-22 21:45:33,498 INFO L125 PetriNetUnfolderBase]: For 23709/23717 co-relation queries the response was YES. [2024-11-22 21:45:33,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24097 conditions, 4547 events. 2803/4547 cut-off events. For 23709/23717 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 24458 event pairs, 369 based on Foata normal form. 2/4515 useless extension candidates. Maximal degree in co-relation 22624. Up to 2278 conditions per place. [2024-11-22 21:45:33,525 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 183 selfloop transitions, 122 changer transitions 5/318 dead transitions. [2024-11-22 21:45:33,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 318 transitions, 4213 flow [2024-11-22 21:45:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:45:33,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:45:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 361 transitions. [2024-11-22 21:45:33,528 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6697588126159555 [2024-11-22 21:45:33,528 INFO L175 Difference]: Start difference. First operand has 131 places, 229 transitions, 2787 flow. Second operand 11 states and 361 transitions. [2024-11-22 21:45:33,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 318 transitions, 4213 flow [2024-11-22 21:45:33,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 318 transitions, 4063 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-11-22 21:45:33,609 INFO L231 Difference]: Finished difference. Result has 134 places, 255 transitions, 3419 flow [2024-11-22 21:45:33,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3419, PETRI_PLACES=134, PETRI_TRANSITIONS=255} [2024-11-22 21:45:33,610 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 86 predicate places. [2024-11-22 21:45:33,610 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 255 transitions, 3419 flow [2024-11-22 21:45:33,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.0) internal successors, (450), 18 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:33,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:33,610 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] [2024-11-22 21:45:33,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 21:45:33,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:33,810 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:33,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash 572688222, now seen corresponding path program 2 times [2024-11-22 21:45:33,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:33,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284336186] [2024-11-22 21:45:33,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:33,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:33,836 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:33,836 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:34,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:34,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:34,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284336186] [2024-11-22 21:45:34,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284336186] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:34,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567101585] [2024-11-22 21:45:34,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:34,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:34,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:34,362 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:34,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:45:34,426 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:34,426 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:34,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 21:45:34,428 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:34,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:45:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:34,657 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:34,687 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:45:34,688 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 18 [2024-11-22 21:45:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:34,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567101585] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:34,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:34,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 8] total 20 [2024-11-22 21:45:34,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844149817] [2024-11-22 21:45:34,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:34,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 21:45:34,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:34,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 21:45:34,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:45:35,353 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:35,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 255 transitions, 3419 flow. Second operand has 20 states, 20 states have (on average 23.9) internal successors, (478), 20 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:35,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:35,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:35,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:36,145 INFO L124 PetriNetUnfolderBase]: 3491/5513 cut-off events. [2024-11-22 21:45:36,146 INFO L125 PetriNetUnfolderBase]: For 33581/33581 co-relation queries the response was YES. [2024-11-22 21:45:36,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30271 conditions, 5513 events. 3491/5513 cut-off events. For 33581/33581 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 29292 event pairs, 529 based on Foata normal form. 2/5493 useless extension candidates. Maximal degree in co-relation 28787. Up to 3305 conditions per place. [2024-11-22 21:45:36,187 INFO L140 encePairwiseOnDemand]: 37/49 looper letters, 205 selfloop transitions, 90 changer transitions 33/334 dead transitions. [2024-11-22 21:45:36,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 334 transitions, 4678 flow [2024-11-22 21:45:36,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:45:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:45:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 355 transitions. [2024-11-22 21:45:36,189 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6586270871985158 [2024-11-22 21:45:36,189 INFO L175 Difference]: Start difference. First operand has 134 places, 255 transitions, 3419 flow. Second operand 11 states and 355 transitions. [2024-11-22 21:45:36,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 334 transitions, 4678 flow [2024-11-22 21:45:36,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 334 transitions, 4556 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-11-22 21:45:36,302 INFO L231 Difference]: Finished difference. Result has 140 places, 234 transitions, 3226 flow [2024-11-22 21:45:36,302 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3226, PETRI_PLACES=140, PETRI_TRANSITIONS=234} [2024-11-22 21:45:36,303 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 92 predicate places. [2024-11-22 21:45:36,303 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 234 transitions, 3226 flow [2024-11-22 21:45:36,303 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 23.9) internal successors, (478), 20 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:36,303 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:36,303 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] [2024-11-22 21:45:36,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-22 21:45:36,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:36,508 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:36,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:36,508 INFO L85 PathProgramCache]: Analyzing trace with hash -528213546, now seen corresponding path program 3 times [2024-11-22 21:45:36,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:36,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268714099] [2024-11-22 21:45:36,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:45:36,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:36,535 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 21:45:36,536 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:36,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:36,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268714099] [2024-11-22 21:45:36,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268714099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:36,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452120473] [2024-11-22 21:45:36,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:45:36,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:36,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:36,934 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:36,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:45:37,002 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-22 21:45:37,003 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:37,004 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-22 21:45:37,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:37,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:45:37,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:45:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:37,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:37,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452120473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:37,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:37,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 21 [2024-11-22 21:45:37,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100114528] [2024-11-22 21:45:37,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:37,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-22 21:45:37,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:37,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-22 21:45:37,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-11-22 21:45:38,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:38,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 234 transitions, 3226 flow. Second operand has 21 states, 21 states have (on average 23.761904761904763) internal successors, (499), 21 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:38,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:38,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:38,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:39,141 INFO L124 PetriNetUnfolderBase]: 4046/6451 cut-off events. [2024-11-22 21:45:39,142 INFO L125 PetriNetUnfolderBase]: For 46323/46329 co-relation queries the response was YES. [2024-11-22 21:45:39,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36226 conditions, 6451 events. 4046/6451 cut-off events. For 46323/46329 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 36106 event pairs, 612 based on Foata normal form. 2/6422 useless extension candidates. Maximal degree in co-relation 35661. Up to 3879 conditions per place. [2024-11-22 21:45:39,188 INFO L140 encePairwiseOnDemand]: 36/49 looper letters, 237 selfloop transitions, 126 changer transitions 6/374 dead transitions. [2024-11-22 21:45:39,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 374 transitions, 5284 flow [2024-11-22 21:45:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:45:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:45:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 450 transitions. [2024-11-22 21:45:39,189 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6559766763848397 [2024-11-22 21:45:39,189 INFO L175 Difference]: Start difference. First operand has 140 places, 234 transitions, 3226 flow. Second operand 14 states and 450 transitions. [2024-11-22 21:45:39,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 374 transitions, 5284 flow [2024-11-22 21:45:39,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 374 transitions, 5109 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-11-22 21:45:39,304 INFO L231 Difference]: Finished difference. Result has 147 places, 278 transitions, 4214 flow [2024-11-22 21:45:39,304 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4214, PETRI_PLACES=147, PETRI_TRANSITIONS=278} [2024-11-22 21:45:39,305 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 99 predicate places. [2024-11-22 21:45:39,305 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 278 transitions, 4214 flow [2024-11-22 21:45:39,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 23.761904761904763) internal successors, (499), 21 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:39,305 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:39,305 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] [2024-11-22 21:45:39,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-22 21:45:39,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:39,509 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:39,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:39,510 INFO L85 PathProgramCache]: Analyzing trace with hash -450098186, now seen corresponding path program 4 times [2024-11-22 21:45:39,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:39,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938559968] [2024-11-22 21:45:39,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:45:39,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:39,522 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:45:39,523 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:39,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:39,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938559968] [2024-11-22 21:45:39,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938559968] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:39,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708468679] [2024-11-22 21:45:39,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:45:39,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:39,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:39,833 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:39,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 21:45:39,899 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:45:39,899 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:39,900 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-22 21:45:39,902 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:39,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:45:40,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:45:40,094 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:40,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:40,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708468679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:40,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:40,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2024-11-22 21:45:40,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099291559] [2024-11-22 21:45:40,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:40,257 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:45:40,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:40,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:45:40,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:45:40,543 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 49 [2024-11-22 21:45:40,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 278 transitions, 4214 flow. Second operand has 18 states, 18 states have (on average 25.055555555555557) internal successors, (451), 18 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:40,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:40,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 49 [2024-11-22 21:45:40,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:41,759 INFO L124 PetriNetUnfolderBase]: 4152/6773 cut-off events. [2024-11-22 21:45:41,759 INFO L125 PetriNetUnfolderBase]: For 71350/71358 co-relation queries the response was YES. [2024-11-22 21:45:41,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42775 conditions, 6773 events. 4152/6773 cut-off events. For 71350/71358 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 40476 event pairs, 664 based on Foata normal form. 4/6745 useless extension candidates. Maximal degree in co-relation 42201. Up to 4271 conditions per place. [2024-11-22 21:45:41,810 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 284 selfloop transitions, 128 changer transitions 9/429 dead transitions. [2024-11-22 21:45:41,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 429 transitions, 6901 flow [2024-11-22 21:45:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-22 21:45:41,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-22 21:45:41,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 521 transitions. [2024-11-22 21:45:41,811 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6645408163265306 [2024-11-22 21:45:41,811 INFO L175 Difference]: Start difference. First operand has 147 places, 278 transitions, 4214 flow. Second operand 16 states and 521 transitions. [2024-11-22 21:45:41,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 429 transitions, 6901 flow [2024-11-22 21:45:42,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 429 transitions, 6670 flow, removed 107 selfloop flow, removed 5 redundant places. [2024-11-22 21:45:42,041 INFO L231 Difference]: Finished difference. Result has 165 places, 331 transitions, 5560 flow [2024-11-22 21:45:42,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4025, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5560, PETRI_PLACES=165, PETRI_TRANSITIONS=331} [2024-11-22 21:45:42,042 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 117 predicate places. [2024-11-22 21:45:42,042 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 331 transitions, 5560 flow [2024-11-22 21:45:42,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.055555555555557) internal successors, (451), 18 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:42,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:42,042 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] [2024-11-22 21:45:42,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-22 21:45:42,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-22 21:45:42,244 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:42,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:42,245 INFO L85 PathProgramCache]: Analyzing trace with hash 179159194, now seen corresponding path program 5 times [2024-11-22 21:45:42,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:42,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052479160] [2024-11-22 21:45:42,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:45:42,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:42,260 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:42,260 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:42,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:42,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:42,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052479160] [2024-11-22 21:45:42,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052479160] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:42,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829051569] [2024-11-22 21:45:42,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:45:42,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:42,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:42,708 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:42,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 21:45:42,786 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:42,786 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:42,788 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-22 21:45:42,789 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:42,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:45:42,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-22 21:45:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:43,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:43,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829051569] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:43,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:43,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 7] total 18 [2024-11-22 21:45:43,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474632841] [2024-11-22 21:45:43,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:43,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:45:43,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:43,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:45:43,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:45:43,661 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-22 21:45:43,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 331 transitions, 5560 flow. Second operand has 18 states, 18 states have (on average 23.055555555555557) internal successors, (415), 18 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:43,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:43,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-22 21:45:43,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:45,579 INFO L124 PetriNetUnfolderBase]: 6034/9309 cut-off events. [2024-11-22 21:45:45,579 INFO L125 PetriNetUnfolderBase]: For 130824/130824 co-relation queries the response was YES. [2024-11-22 21:45:45,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61396 conditions, 9309 events. 6034/9309 cut-off events. For 130824/130824 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 52510 event pairs, 1110 based on Foata normal form. 2/9291 useless extension candidates. Maximal degree in co-relation 60906. Up to 6154 conditions per place. [2024-11-22 21:45:45,747 INFO L140 encePairwiseOnDemand]: 35/49 looper letters, 280 selfloop transitions, 115 changer transitions 42/440 dead transitions. [2024-11-22 21:45:45,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 440 transitions, 7496 flow [2024-11-22 21:45:45,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 21:45:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-22 21:45:45,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 388 transitions. [2024-11-22 21:45:45,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-11-22 21:45:45,749 INFO L175 Difference]: Start difference. First operand has 165 places, 331 transitions, 5560 flow. Second operand 12 states and 388 transitions. [2024-11-22 21:45:45,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 440 transitions, 7496 flow [2024-11-22 21:45:46,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 440 transitions, 7031 flow, removed 171 selfloop flow, removed 9 redundant places. [2024-11-22 21:45:46,153 INFO L231 Difference]: Finished difference. Result has 170 places, 330 transitions, 5578 flow [2024-11-22 21:45:46,154 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=5138, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5578, PETRI_PLACES=170, PETRI_TRANSITIONS=330} [2024-11-22 21:45:46,154 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 122 predicate places. [2024-11-22 21:45:46,154 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 330 transitions, 5578 flow [2024-11-22 21:45:46,154 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 23.055555555555557) internal successors, (415), 18 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:46,154 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:46,154 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] [2024-11-22 21:45:46,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-22 21:45:46,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:46,358 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:46,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash -39725817, now seen corresponding path program 6 times [2024-11-22 21:45:46,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:46,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209326677] [2024-11-22 21:45:46,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:45:46,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:46,374 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:45:46,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:46,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 21:45:46,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:46,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209326677] [2024-11-22 21:45:46,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209326677] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:46,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073399832] [2024-11-22 21:45:46,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:45:46,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:46,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:46,447 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:46,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 21:45:46,517 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-11-22 21:45:46,517 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:46,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-22 21:45:46,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:46,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 21:45:46,623 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:46,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 21:45:46,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073399832] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:46,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:46,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-22 21:45:46,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758709447] [2024-11-22 21:45:46,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:46,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:45:46,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:46,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:45:46,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:45:46,786 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:46,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 330 transitions, 5578 flow. Second operand has 14 states, 14 states have (on average 24.571428571428573) internal successors, (344), 14 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:46,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:46,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:46,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:48,473 INFO L124 PetriNetUnfolderBase]: 5719/8845 cut-off events. [2024-11-22 21:45:48,473 INFO L125 PetriNetUnfolderBase]: For 139411/139411 co-relation queries the response was YES. [2024-11-22 21:45:48,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60070 conditions, 8845 events. 5719/8845 cut-off events. For 139411/139411 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 51306 event pairs, 613 based on Foata normal form. 156/8986 useless extension candidates. Maximal degree in co-relation 59974. Up to 3178 conditions per place. [2024-11-22 21:45:48,552 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 461 selfloop transitions, 31 changer transitions 0/498 dead transitions. [2024-11-22 21:45:48,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 498 transitions, 9459 flow [2024-11-22 21:45:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:45:48,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:45:48,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 260 transitions. [2024-11-22 21:45:48,554 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5895691609977324 [2024-11-22 21:45:48,554 INFO L175 Difference]: Start difference. First operand has 170 places, 330 transitions, 5578 flow. Second operand 9 states and 260 transitions. [2024-11-22 21:45:48,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 498 transitions, 9459 flow [2024-11-22 21:45:48,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 498 transitions, 8919 flow, removed 83 selfloop flow, removed 15 redundant places. [2024-11-22 21:45:48,908 INFO L231 Difference]: Finished difference. Result has 155 places, 321 transitions, 5008 flow [2024-11-22 21:45:48,908 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4862, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5008, PETRI_PLACES=155, PETRI_TRANSITIONS=321} [2024-11-22 21:45:48,908 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 107 predicate places. [2024-11-22 21:45:48,908 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 321 transitions, 5008 flow [2024-11-22 21:45:48,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 24.571428571428573) internal successors, (344), 14 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:48,909 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:48,909 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] [2024-11-22 21:45:48,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-22 21:45:49,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:49,109 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:49,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1309974548, now seen corresponding path program 7 times [2024-11-22 21:45:49,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:49,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958873949] [2024-11-22 21:45:49,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:45:49,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:45:49,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:49,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958873949] [2024-11-22 21:45:49,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958873949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:49,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789905120] [2024-11-22 21:45:49,371 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:45:49,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:49,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:49,373 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:49,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-22 21:45:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:45:49,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:45:49,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:45:49,562 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:49,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:45:49,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789905120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:49,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:49,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-22 21:45:49,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362870886] [2024-11-22 21:45:49,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:49,662 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:45:49,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:49,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:45:49,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:45:49,730 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:45:49,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 321 transitions, 5008 flow. Second operand has 13 states, 13 states have (on average 24.615384615384617) internal successors, (320), 13 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:49,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:49,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:45:49,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:45:51,440 INFO L124 PetriNetUnfolderBase]: 6153/9444 cut-off events. [2024-11-22 21:45:51,441 INFO L125 PetriNetUnfolderBase]: For 149856/149862 co-relation queries the response was YES. [2024-11-22 21:45:51,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63490 conditions, 9444 events. 6153/9444 cut-off events. For 149856/149862 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 54553 event pairs, 928 based on Foata normal form. 175/9602 useless extension candidates. Maximal degree in co-relation 63403. Up to 3411 conditions per place. [2024-11-22 21:45:51,523 INFO L140 encePairwiseOnDemand]: 42/49 looper letters, 420 selfloop transitions, 17 changer transitions 0/443 dead transitions. [2024-11-22 21:45:51,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 443 transitions, 7839 flow [2024-11-22 21:45:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:45:51,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:45:51,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 263 transitions. [2024-11-22 21:45:51,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5963718820861678 [2024-11-22 21:45:51,524 INFO L175 Difference]: Start difference. First operand has 155 places, 321 transitions, 5008 flow. Second operand 9 states and 263 transitions. [2024-11-22 21:45:51,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 443 transitions, 7839 flow [2024-11-22 21:45:51,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 443 transitions, 7635 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-11-22 21:45:51,836 INFO L231 Difference]: Finished difference. Result has 157 places, 279 transitions, 4152 flow [2024-11-22 21:45:51,837 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4077, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4152, PETRI_PLACES=157, PETRI_TRANSITIONS=279} [2024-11-22 21:45:51,837 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 109 predicate places. [2024-11-22 21:45:51,837 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 279 transitions, 4152 flow [2024-11-22 21:45:51,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 24.615384615384617) internal successors, (320), 13 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:51,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:45:51,838 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:45:51,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-22 21:45:52,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:52,038 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:45:52,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:45:52,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2018856397, now seen corresponding path program 8 times [2024-11-22 21:45:52,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:45:52,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229989474] [2024-11-22 21:45:52,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:52,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:45:52,076 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:52,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:53,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:45:53,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:45:53,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229989474] [2024-11-22 21:45:53,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229989474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:45:53,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188103758] [2024-11-22 21:45:53,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:45:53,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:45:53,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:45:53,093 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:45:53,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-22 21:45:53,171 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:45:53,171 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:45:53,173 INFO L255 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-11-22 21:45:53,174 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:45:53,641 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:45:53,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-22 21:45:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:45:53,696 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:45:53,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:45:53,944 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 48 [2024-11-22 21:45:54,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:45:54,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188103758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:45:54,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:45:54,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 38 [2024-11-22 21:45:54,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423398667] [2024-11-22 21:45:54,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:45:54,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-22 21:45:54,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:45:54,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-22 21:45:54,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1260, Unknown=0, NotChecked=0, Total=1406 [2024-11-22 21:45:56,295 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 49 [2024-11-22 21:45:56,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 279 transitions, 4152 flow. Second operand has 38 states, 38 states have (on average 22.5) internal successors, (855), 38 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:45:56,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:45:56,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 49 [2024-11-22 21:45:56,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:46:00,361 INFO L124 PetriNetUnfolderBase]: 11672/17535 cut-off events. [2024-11-22 21:46:00,362 INFO L125 PetriNetUnfolderBase]: For 271192/271192 co-relation queries the response was YES. [2024-11-22 21:46:00,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118666 conditions, 17535 events. 11672/17535 cut-off events. For 271192/271192 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 102679 event pairs, 850 based on Foata normal form. 1/17525 useless extension candidates. Maximal degree in co-relation 118579. Up to 7383 conditions per place. [2024-11-22 21:46:00,559 INFO L140 encePairwiseOnDemand]: 33/49 looper letters, 334 selfloop transitions, 339 changer transitions 1/677 dead transitions. [2024-11-22 21:46:00,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 677 transitions, 10881 flow [2024-11-22 21:46:00,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-22 21:46:00,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-22 21:46:00,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 769 transitions. [2024-11-22 21:46:00,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6277551020408163 [2024-11-22 21:46:00,561 INFO L175 Difference]: Start difference. First operand has 157 places, 279 transitions, 4152 flow. Second operand 25 states and 769 transitions. [2024-11-22 21:46:00,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 677 transitions, 10881 flow [2024-11-22 21:46:01,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 677 transitions, 10858 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:46:01,105 INFO L231 Difference]: Finished difference. Result has 184 places, 508 transitions, 9866 flow [2024-11-22 21:46:01,105 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=9866, PETRI_PLACES=184, PETRI_TRANSITIONS=508} [2024-11-22 21:46:01,105 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 136 predicate places. [2024-11-22 21:46:01,106 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 508 transitions, 9866 flow [2024-11-22 21:46:01,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 22.5) internal successors, (855), 38 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:46:01,106 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:46:01,106 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:46:01,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-22 21:46:01,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-22 21:46:01,308 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:46:01,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:46:01,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1514153163, now seen corresponding path program 1 times [2024-11-22 21:46:01,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:46:01,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111860860] [2024-11-22 21:46:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:46:01,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:46:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:46:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:02,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:46:02,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111860860] [2024-11-22 21:46:02,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111860860] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:46:02,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283815181] [2024-11-22 21:46:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:46:02,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:46:02,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:46:02,333 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:46:02,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-22 21:46:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:46:02,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-22 21:46:02,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:46:02,958 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:46:02,958 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 31 treesize of output 11 [2024-11-22 21:46:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:46:02,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:46:03,181 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:46:03,182 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 48 [2024-11-22 21:46:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:46:03,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283815181] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:46:03,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:46:03,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 12] total 38 [2024-11-22 21:46:03,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946652931] [2024-11-22 21:46:03,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:46:03,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-22 21:46:03,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:46:03,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-22 21:46:03,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1292, Unknown=0, NotChecked=0, Total=1406 [2024-11-22 21:46:05,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 49 [2024-11-22 21:46:05,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 508 transitions, 9866 flow. Second operand has 38 states, 38 states have (on average 23.342105263157894) internal successors, (887), 38 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:46:05,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:46:05,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 49 [2024-11-22 21:46:05,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:46:11,718 INFO L124 PetriNetUnfolderBase]: 13632/20744 cut-off events. [2024-11-22 21:46:11,718 INFO L125 PetriNetUnfolderBase]: For 446498/446537 co-relation queries the response was YES. [2024-11-22 21:46:11,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156565 conditions, 20744 events. 13632/20744 cut-off events. For 446498/446537 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 128010 event pairs, 2011 based on Foata normal form. 8/20683 useless extension candidates. Maximal degree in co-relation 156469. Up to 11482 conditions per place. [2024-11-22 21:46:12,053 INFO L140 encePairwiseOnDemand]: 33/49 looper letters, 587 selfloop transitions, 392 changer transitions 1/994 dead transitions. [2024-11-22 21:46:12,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 994 transitions, 18791 flow [2024-11-22 21:46:12,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-11-22 21:46:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2024-11-22 21:46:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 1104 transitions. [2024-11-22 21:46:12,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.643731778425656 [2024-11-22 21:46:12,056 INFO L175 Difference]: Start difference. First operand has 184 places, 508 transitions, 9866 flow. Second operand 35 states and 1104 transitions. [2024-11-22 21:46:12,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 994 transitions, 18791 flow [2024-11-22 21:46:14,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 994 transitions, 17132 flow, removed 781 selfloop flow, removed 11 redundant places. [2024-11-22 21:46:14,741 INFO L231 Difference]: Finished difference. Result has 228 places, 737 transitions, 14856 flow [2024-11-22 21:46:14,742 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=49, PETRI_DIFFERENCE_MINUEND_FLOW=8950, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=14856, PETRI_PLACES=228, PETRI_TRANSITIONS=737} [2024-11-22 21:46:14,745 INFO L277 CegarLoopForPetriNet]: 48 programPoint places, 180 predicate places. [2024-11-22 21:46:14,745 INFO L471 AbstractCegarLoop]: Abstraction has has 228 places, 737 transitions, 14856 flow [2024-11-22 21:46:14,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 23.342105263157894) internal successors, (887), 38 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:46:14,746 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:46:14,746 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:46:14,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-22 21:46:14,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-22 21:46:14,947 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-22 21:46:14,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:46:14,947 INFO L85 PathProgramCache]: Analyzing trace with hash -976085521, now seen corresponding path program 2 times [2024-11-22 21:46:14,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:46:14,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397260846] [2024-11-22 21:46:14,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:46:14,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:46:14,991 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:46:14,997 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:46:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:16,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:46:16,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397260846] [2024-11-22 21:46:16,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397260846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:46:16,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197855615] [2024-11-22 21:46:16,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:46:16,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:46:16,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:46:16,020 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:46:16,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-22 21:46:16,099 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:46:16,099 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:46:16,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-22 21:46:16,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:46:16,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-22 21:46:16,797 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:46:16,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-22 21:46:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:16,823 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:46:17,644 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 31 treesize of output 27 [2024-11-22 21:46:17,655 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:46:17,655 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 58 treesize of output 41 [2024-11-22 21:46:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:46:17,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197855615] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:46:17,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:46:17,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 17] total 47 [2024-11-22 21:46:17,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143692996] [2024-11-22 21:46:17,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:46:17,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-11-22 21:46:17,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:46:17,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-11-22 21:46:17,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2016, Unknown=0, NotChecked=0, Total=2256 [2024-11-22 21:46:20,306 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 49 [2024-11-22 21:46:20,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 737 transitions, 14856 flow. Second operand has 48 states, 48 states have (on average 16.104166666666668) internal successors, (773), 48 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:46:20,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:46:20,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 49 [2024-11-22 21:46:20,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:46:26,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:46:30,429 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:46:40,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]