./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i -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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:23:12,262 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:23:12,329 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:23:12,335 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:23:12,337 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:23:12,365 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:23:12,366 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:23:12,366 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:23:12,367 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:23:12,367 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:23:12,368 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:23:12,368 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:23:12,369 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:23:12,371 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:23:12,371 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:23:12,371 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:23:12,372 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:23:12,372 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:23:12,372 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:23:12,373 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:23:12,373 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:23:12,376 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:23:12,377 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:23:12,377 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:23:12,377 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:23:12,377 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:23:12,377 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:23:12,378 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:23:12,378 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:23:12,378 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:23:12,378 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:23:12,379 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:23:12,379 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:23:12,379 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:23:12,379 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:23:12,379 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:23:12,380 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:23:12,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:23:12,380 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:23:12,381 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:23:12,381 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:23:12,382 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:23:12,382 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2024-10-14 19:23:12,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:23:12,651 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:23:12,654 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:23:12,655 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:23:12,655 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:23:12,656 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i [2024-10-14 19:23:14,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:23:14,382 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:23:14,384 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i [2024-10-14 19:23:14,405 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3a437f10/b306854694d34508b2e3f223649cef2f/FLAGe109acc7f [2024-10-14 19:23:14,670 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3a437f10/b306854694d34508b2e3f223649cef2f [2024-10-14 19:23:14,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:23:14,673 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:23:14,675 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:23:14,675 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:23:14,680 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:23:14,681 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:23:14" (1/1) ... [2024-10-14 19:23:14,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad3c1ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:14, skipping insertion in model container [2024-10-14 19:23:14,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:23:14" (1/1) ... [2024-10-14 19:23:14,726 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:23:15,193 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:23:15,208 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:23:15,249 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:23:15,299 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:23:15,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15 WrapperNode [2024-10-14 19:23:15,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:23:15,301 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:23:15,301 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:23:15,301 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:23:15,312 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (1/1) ... [2024-10-14 19:23:15,334 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (1/1) ... [2024-10-14 19:23:15,369 INFO L138 Inliner]: procedures = 277, calls = 36, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 154 [2024-10-14 19:23:15,369 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:23:15,371 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:23:15,371 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:23:15,371 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:23:15,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (1/1) ... [2024-10-14 19:23:15,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (1/1) ... [2024-10-14 19:23:15,381 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (1/1) ... [2024-10-14 19:23:15,396 INFO L175 MemorySlicer]: Split 14 memory accesses to 3 slices as follows [2, 5, 7]. 50 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5]. The 1 writes are split as follows [0, 0, 1]. [2024-10-14 19:23:15,396 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (1/1) ... [2024-10-14 19:23:15,397 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (1/1) ... [2024-10-14 19:23:15,403 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (1/1) ... [2024-10-14 19:23:15,406 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (1/1) ... [2024-10-14 19:23:15,408 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (1/1) ... [2024-10-14 19:23:15,410 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (1/1) ... [2024-10-14 19:23:15,413 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:23:15,414 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:23:15,414 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:23:15,414 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:23:15,415 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (1/1) ... [2024-10-14 19:23:15,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:23:15,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:23:15,454 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) [2024-10-14 19:23:15,459 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 [2024-10-14 19:23:15,497 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-14 19:23:15,498 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-14 19:23:15,498 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-14 19:23:15,498 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-14 19:23:15,498 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-14 19:23:15,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 19:23:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 19:23:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 19:23:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 19:23:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 19:23:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 19:23:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-14 19:23:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:23:15,499 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 19:23:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 19:23:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 19:23:15,500 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:23:15,500 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:23:15,502 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:23:15,665 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:23:15,668 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:23:15,958 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:23:15,958 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:23:16,142 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:23:16,142 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-14 19:23:16,143 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:23:16 BoogieIcfgContainer [2024-10-14 19:23:16,143 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:23:16,146 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:23:16,146 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:23:16,150 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:23:16,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:23:14" (1/3) ... [2024-10-14 19:23:16,151 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a639167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:23:16, skipping insertion in model container [2024-10-14 19:23:16,151 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:23:15" (2/3) ... [2024-10-14 19:23:16,151 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a639167 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:23:16, skipping insertion in model container [2024-10-14 19:23:16,151 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:23:16" (3/3) ... [2024-10-14 19:23:16,153 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-10-14 19:23:16,165 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:23:16,165 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-10-14 19:23:16,165 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:23:16,271 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 19:23:16,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 122 flow [2024-10-14 19:23:16,386 INFO L124 PetriNetUnfolderBase]: 9/52 cut-off events. [2024-10-14 19:23:16,386 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:23:16,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 52 events. 9/52 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 136 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 47. Up to 3 conditions per place. [2024-10-14 19:23:16,392 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 122 flow [2024-10-14 19:23:16,397 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 51 transitions, 114 flow [2024-10-14 19:23:16,408 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:23:16,414 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;@543b55d6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:23:16,414 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-14 19:23:16,423 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:23:16,427 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2024-10-14 19:23:16,427 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:23:16,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:16,429 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:16,429 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:16,436 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:16,437 INFO L85 PathProgramCache]: Analyzing trace with hash 686360153, now seen corresponding path program 1 times [2024-10-14 19:23:16,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:16,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135540564] [2024-10-14 19:23:16,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:16,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:16,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:16,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135540564] [2024-10-14 19:23:16,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135540564] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:16,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:16,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:23:16,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660599185] [2024-10-14 19:23:16,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:16,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:23:16,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:16,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:23:16,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:23:16,956 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-14 19:23:16,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 51 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:16,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:16,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-14 19:23:16,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:17,270 INFO L124 PetriNetUnfolderBase]: 459/866 cut-off events. [2024-10-14 19:23:17,270 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-14 19:23:17,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1638 conditions, 866 events. 459/866 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 4349 event pairs, 245 based on Foata normal form. 94/832 useless extension candidates. Maximal degree in co-relation 1560. Up to 520 conditions per place. [2024-10-14 19:23:17,282 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 43 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-10-14 19:23:17,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 225 flow [2024-10-14 19:23:17,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:23:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:23:17,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-10-14 19:23:17,298 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-10-14 19:23:17,319 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 114 flow. Second operand 4 states and 113 transitions. [2024-10-14 19:23:17,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 225 flow [2024-10-14 19:23:17,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 215 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:23:17,328 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 98 flow [2024-10-14 19:23:17,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=45, PETRI_TRANSITIONS=44} [2024-10-14 19:23:17,337 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2024-10-14 19:23:17,338 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 98 flow [2024-10-14 19:23:17,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:17,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:17,339 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:17,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 19:23:17,340 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:17,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:17,341 INFO L85 PathProgramCache]: Analyzing trace with hash 686360154, now seen corresponding path program 1 times [2024-10-14 19:23:17,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:17,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835645732] [2024-10-14 19:23:17,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:17,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:17,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:17,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:17,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835645732] [2024-10-14 19:23:17,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835645732] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:17,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:17,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:23:17,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236963490] [2024-10-14 19:23:17,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:17,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:23:17,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:17,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:23:17,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:23:17,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-14 19:23:17,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 44 transitions, 98 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:17,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:17,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-14 19:23:17,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:17,990 INFO L124 PetriNetUnfolderBase]: 574/1064 cut-off events. [2024-10-14 19:23:17,991 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-10-14 19:23:17,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2075 conditions, 1064 events. 574/1064 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5069 event pairs, 179 based on Foata normal form. 9/926 useless extension candidates. Maximal degree in co-relation 695. Up to 755 conditions per place. [2024-10-14 19:23:17,998 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 59 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-10-14 19:23:17,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 293 flow [2024-10-14 19:23:17,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:23:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:23:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-14 19:23:18,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5296296296296297 [2024-10-14 19:23:18,001 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 98 flow. Second operand 5 states and 143 transitions. [2024-10-14 19:23:18,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 293 flow [2024-10-14 19:23:18,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 75 transitions, 285 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:23:18,004 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 128 flow [2024-10-14 19:23:18,004 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=128, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-10-14 19:23:18,005 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-10-14 19:23:18,005 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 128 flow [2024-10-14 19:23:18,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:18,005 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:18,006 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:18,006 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 19:23:18,006 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:18,006 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash -423406336, now seen corresponding path program 1 times [2024-10-14 19:23:18,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:18,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192229769] [2024-10-14 19:23:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:18,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:18,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192229769] [2024-10-14 19:23:18,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192229769] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:18,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:18,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:23:18,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319834432] [2024-10-14 19:23:18,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:18,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:23:18,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:18,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:23:18,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:23:18,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-14 19:23:18,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2024-10-14 19:23:18,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:18,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-14 19:23:18,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:18,342 INFO L124 PetriNetUnfolderBase]: 823/1511 cut-off events. [2024-10-14 19:23:18,343 INFO L125 PetriNetUnfolderBase]: For 263/266 co-relation queries the response was YES. [2024-10-14 19:23:18,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3206 conditions, 1511 events. 823/1511 cut-off events. For 263/266 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 7773 event pairs, 363 based on Foata normal form. 1/1366 useless extension candidates. Maximal degree in co-relation 1126. Up to 857 conditions per place. [2024-10-14 19:23:18,353 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 68 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2024-10-14 19:23:18,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 86 transitions, 370 flow [2024-10-14 19:23:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:23:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:23:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-10-14 19:23:18,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-14 19:23:18,355 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 128 flow. Second operand 4 states and 135 transitions. [2024-10-14 19:23:18,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 86 transitions, 370 flow [2024-10-14 19:23:18,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 86 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:23:18,359 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 159 flow [2024-10-14 19:23:18,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-10-14 19:23:18,361 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-10-14 19:23:18,361 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 159 flow [2024-10-14 19:23:18,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 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) [2024-10-14 19:23:18,362 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:18,362 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:18,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 19:23:18,363 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:18,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:18,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1635275436, now seen corresponding path program 1 times [2024-10-14 19:23:18,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:18,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259023524] [2024-10-14 19:23:18,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:18,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:18,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:18,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259023524] [2024-10-14 19:23:18,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259023524] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:18,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:18,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:23:18,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705259446] [2024-10-14 19:23:18,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:18,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:23:18,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:18,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:23:18,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:23:18,418 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-14 19:23:18,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2024-10-14 19:23:18,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:18,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-14 19:23:18,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:18,631 INFO L124 PetriNetUnfolderBase]: 957/1715 cut-off events. [2024-10-14 19:23:18,632 INFO L125 PetriNetUnfolderBase]: For 546/548 co-relation queries the response was YES. [2024-10-14 19:23:18,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4011 conditions, 1715 events. 957/1715 cut-off events. For 546/548 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8862 event pairs, 395 based on Foata normal form. 12/1574 useless extension candidates. Maximal degree in co-relation 1267. Up to 1191 conditions per place. [2024-10-14 19:23:18,642 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 55 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-10-14 19:23:18,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 328 flow [2024-10-14 19:23:18,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:23:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:23:18,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-10-14 19:23:18,645 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-10-14 19:23:18,645 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 159 flow. Second operand 3 states and 103 transitions. [2024-10-14 19:23:18,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 328 flow [2024-10-14 19:23:18,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:23:18,651 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 168 flow [2024-10-14 19:23:18,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-10-14 19:23:18,652 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 6 predicate places. [2024-10-14 19:23:18,652 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 168 flow [2024-10-14 19:23:18,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 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) [2024-10-14 19:23:18,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:18,652 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:18,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 19:23:18,653 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:18,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:18,653 INFO L85 PathProgramCache]: Analyzing trace with hash 907179489, now seen corresponding path program 1 times [2024-10-14 19:23:18,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:18,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231571978] [2024-10-14 19:23:18,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:18,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:18,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:18,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:18,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231571978] [2024-10-14 19:23:18,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231571978] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:18,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:18,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:23:18,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771069524] [2024-10-14 19:23:18,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:18,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:23:18,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:18,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:23:18,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:23:18,732 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-14 19:23:18,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:18,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:18,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-14 19:23:18,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:18,860 INFO L124 PetriNetUnfolderBase]: 499/1033 cut-off events. [2024-10-14 19:23:18,860 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2024-10-14 19:23:18,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2392 conditions, 1033 events. 499/1033 cut-off events. For 250/250 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4803 event pairs, 105 based on Foata normal form. 60/1021 useless extension candidates. Maximal degree in co-relation 918. Up to 634 conditions per place. [2024-10-14 19:23:18,867 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 45 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-10-14 19:23:18,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 300 flow [2024-10-14 19:23:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:23:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:23:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-10-14 19:23:18,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-10-14 19:23:18,869 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 168 flow. Second operand 3 states and 91 transitions. [2024-10-14 19:23:18,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 300 flow [2024-10-14 19:23:18,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 292 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-14 19:23:18,873 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 170 flow [2024-10-14 19:23:18,874 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-10-14 19:23:18,874 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2024-10-14 19:23:18,875 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 170 flow [2024-10-14 19:23:18,875 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:18,875 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:18,875 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:18,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 19:23:18,876 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:18,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash 704836300, now seen corresponding path program 1 times [2024-10-14 19:23:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:18,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041399312] [2024-10-14 19:23:18,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:18,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:19,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:19,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041399312] [2024-10-14 19:23:19,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041399312] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:23:19,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830067134] [2024-10-14 19:23:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:19,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:23:19,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:23:19,204 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) [2024-10-14 19:23:19,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 19:23:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:19,303 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 19:23:19,308 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:23:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:19,555 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:23:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:19,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830067134] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:23:19,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:23:19,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-10-14 19:23:19,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547867728] [2024-10-14 19:23:19,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:23:19,704 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-14 19:23:19,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:19,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-14 19:23:19,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-10-14 19:23:19,781 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-14 19:23:19,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 170 flow. Second operand has 15 states, 15 states have (on average 17.0) internal successors, (255), 15 states have internal predecessors, (255), 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) [2024-10-14 19:23:19,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:19,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-14 19:23:19,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:20,788 INFO L124 PetriNetUnfolderBase]: 1740/3509 cut-off events. [2024-10-14 19:23:20,788 INFO L125 PetriNetUnfolderBase]: For 796/796 co-relation queries the response was YES. [2024-10-14 19:23:20,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8220 conditions, 3509 events. 1740/3509 cut-off events. For 796/796 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 19737 event pairs, 262 based on Foata normal form. 54/3328 useless extension candidates. Maximal degree in co-relation 2561. Up to 699 conditions per place. [2024-10-14 19:23:20,810 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 194 selfloop transitions, 26 changer transitions 0/231 dead transitions. [2024-10-14 19:23:20,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 231 transitions, 1170 flow [2024-10-14 19:23:20,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-14 19:23:20,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-14 19:23:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 425 transitions. [2024-10-14 19:23:20,813 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5246913580246914 [2024-10-14 19:23:20,813 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 170 flow. Second operand 15 states and 425 transitions. [2024-10-14 19:23:20,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 231 transitions, 1170 flow [2024-10-14 19:23:20,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 231 transitions, 1148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:23:20,822 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 417 flow [2024-10-14 19:23:20,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=417, PETRI_PLACES=81, PETRI_TRANSITIONS=75} [2024-10-14 19:23:20,824 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2024-10-14 19:23:20,825 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 417 flow [2024-10-14 19:23:20,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.0) internal successors, (255), 15 states have internal predecessors, (255), 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) [2024-10-14 19:23:20,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:20,826 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] [2024-10-14 19:23:20,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 19:23:21,029 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-14 19:23:21,030 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:21,030 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:21,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1089354263, now seen corresponding path program 1 times [2024-10-14 19:23:21,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:21,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18944702] [2024-10-14 19:23:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:21,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:21,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:21,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18944702] [2024-10-14 19:23:21,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18944702] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:21,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:21,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:23:21,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997330747] [2024-10-14 19:23:21,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:21,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:23:21,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:21,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:23:21,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:23:21,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-14 19:23:21,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 75 transitions, 417 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:21,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:21,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-14 19:23:21,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:21,536 INFO L124 PetriNetUnfolderBase]: 1695/3429 cut-off events. [2024-10-14 19:23:21,537 INFO L125 PetriNetUnfolderBase]: For 1886/1886 co-relation queries the response was YES. [2024-10-14 19:23:21,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8807 conditions, 3429 events. 1695/3429 cut-off events. For 1886/1886 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 19738 event pairs, 1170 based on Foata normal form. 0/3315 useless extension candidates. Maximal degree in co-relation 7329. Up to 2532 conditions per place. [2024-10-14 19:23:21,560 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 64 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2024-10-14 19:23:21,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 566 flow [2024-10-14 19:23:21,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:23:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:23:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-10-14 19:23:21,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-14 19:23:21,562 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 417 flow. Second operand 4 states and 96 transitions. [2024-10-14 19:23:21,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 566 flow [2024-10-14 19:23:21,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 79 transitions, 556 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-10-14 19:23:21,576 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 411 flow [2024-10-14 19:23:21,576 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=411, PETRI_PLACES=83, PETRI_TRANSITIONS=74} [2024-10-14 19:23:21,578 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2024-10-14 19:23:21,579 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 411 flow [2024-10-14 19:23:21,579 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:21,579 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:21,579 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] [2024-10-14 19:23:21,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 19:23:21,580 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:21,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1748660898, now seen corresponding path program 1 times [2024-10-14 19:23:21,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:21,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957940161] [2024-10-14 19:23:21,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:21,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:21,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:21,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957940161] [2024-10-14 19:23:21,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957940161] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:21,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:21,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-14 19:23:21,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097740256] [2024-10-14 19:23:21,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:21,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-14 19:23:21,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:21,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-14 19:23:21,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-14 19:23:21,893 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-14 19:23:21,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 74 transitions, 411 flow. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 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) [2024-10-14 19:23:21,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:21,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-14 19:23:21,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:22,445 INFO L124 PetriNetUnfolderBase]: 1780/3573 cut-off events. [2024-10-14 19:23:22,446 INFO L125 PetriNetUnfolderBase]: For 2161/2161 co-relation queries the response was YES. [2024-10-14 19:23:22,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9289 conditions, 3573 events. 1780/3573 cut-off events. For 2161/2161 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 20371 event pairs, 436 based on Foata normal form. 0/3428 useless extension candidates. Maximal degree in co-relation 7786. Up to 2729 conditions per place. [2024-10-14 19:23:22,474 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 100 selfloop transitions, 7 changer transitions 0/118 dead transitions. [2024-10-14 19:23:22,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 118 transitions, 776 flow [2024-10-14 19:23:22,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-14 19:23:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-14 19:23:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-10-14 19:23:22,478 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-10-14 19:23:22,478 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 411 flow. Second operand 7 states and 185 transitions. [2024-10-14 19:23:22,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 118 transitions, 776 flow [2024-10-14 19:23:22,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 118 transitions, 768 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:23:22,493 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 458 flow [2024-10-14 19:23:22,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=458, PETRI_PLACES=89, PETRI_TRANSITIONS=78} [2024-10-14 19:23:22,497 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2024-10-14 19:23:22,497 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 458 flow [2024-10-14 19:23:22,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 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) [2024-10-14 19:23:22,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:22,497 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] [2024-10-14 19:23:22,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 19:23:22,498 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:22,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:22,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1117590170, now seen corresponding path program 1 times [2024-10-14 19:23:22,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:22,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115480200] [2024-10-14 19:23:22,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:22,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:22,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:22,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:22,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:22,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115480200] [2024-10-14 19:23:22,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115480200] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:22,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:22,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:23:22,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415357419] [2024-10-14 19:23:22,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:22,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:23:22,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:22,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:23:22,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:23:22,539 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-14 19:23:22,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 78 transitions, 458 flow. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:22,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:22,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-14 19:23:22,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:23,205 INFO L124 PetriNetUnfolderBase]: 2658/5549 cut-off events. [2024-10-14 19:23:23,205 INFO L125 PetriNetUnfolderBase]: For 3888/3888 co-relation queries the response was YES. [2024-10-14 19:23:23,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14231 conditions, 5549 events. 2658/5549 cut-off events. For 3888/3888 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 36741 event pairs, 1282 based on Foata normal form. 137/5489 useless extension candidates. Maximal degree in co-relation 12407. Up to 3123 conditions per place. [2024-10-14 19:23:23,237 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 121 selfloop transitions, 2 changer transitions 0/135 dead transitions. [2024-10-14 19:23:23,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 135 transitions, 1088 flow [2024-10-14 19:23:23,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:23:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:23:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-10-14 19:23:23,242 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-10-14 19:23:23,242 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 458 flow. Second operand 3 states and 104 transitions. [2024-10-14 19:23:23,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 135 transitions, 1088 flow [2024-10-14 19:23:23,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 135 transitions, 1072 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-14 19:23:23,260 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 461 flow [2024-10-14 19:23:23,261 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=461, PETRI_PLACES=89, PETRI_TRANSITIONS=79} [2024-10-14 19:23:23,262 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2024-10-14 19:23:23,263 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 461 flow [2024-10-14 19:23:23,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:23,264 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:23,264 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:23,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 19:23:23,264 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:23,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:23,265 INFO L85 PathProgramCache]: Analyzing trace with hash -455977335, now seen corresponding path program 1 times [2024-10-14 19:23:23,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:23,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634591349] [2024-10-14 19:23:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:23,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:23,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:23,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634591349] [2024-10-14 19:23:23,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634591349] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:23,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:23,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-14 19:23:23,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11286248] [2024-10-14 19:23:23,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:23,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:23:23,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:23:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:23:24,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-14 19:23:24,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 79 transitions, 461 flow. Second operand has 10 states, 10 states have (on average 17.9) internal successors, (179), 10 states have internal predecessors, (179), 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) [2024-10-14 19:23:24,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:24,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-14 19:23:24,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:25,414 INFO L124 PetriNetUnfolderBase]: 3462/7028 cut-off events. [2024-10-14 19:23:25,415 INFO L125 PetriNetUnfolderBase]: For 5748/5748 co-relation queries the response was YES. [2024-10-14 19:23:25,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19704 conditions, 7028 events. 3462/7028 cut-off events. For 5748/5748 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 44915 event pairs, 786 based on Foata normal form. 0/6808 useless extension candidates. Maximal degree in co-relation 16129. Up to 3938 conditions per place. [2024-10-14 19:23:25,455 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 165 selfloop transitions, 12 changer transitions 0/189 dead transitions. [2024-10-14 19:23:25,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 189 transitions, 1335 flow [2024-10-14 19:23:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:23:25,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:23:25,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 319 transitions. [2024-10-14 19:23:25,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49228395061728397 [2024-10-14 19:23:25,458 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 461 flow. Second operand 12 states and 319 transitions. [2024-10-14 19:23:25,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 189 transitions, 1335 flow [2024-10-14 19:23:25,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 189 transitions, 1323 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:23:25,481 INFO L231 Difference]: Finished difference. Result has 103 places, 83 transitions, 523 flow [2024-10-14 19:23:25,482 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=523, PETRI_PLACES=103, PETRI_TRANSITIONS=83} [2024-10-14 19:23:25,482 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 54 predicate places. [2024-10-14 19:23:25,482 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 83 transitions, 523 flow [2024-10-14 19:23:25,483 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.9) internal successors, (179), 10 states have internal predecessors, (179), 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) [2024-10-14 19:23:25,483 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:25,483 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:25,483 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 19:23:25,483 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:25,484 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:25,484 INFO L85 PathProgramCache]: Analyzing trace with hash -997094798, now seen corresponding path program 1 times [2024-10-14 19:23:25,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:25,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119338882] [2024-10-14 19:23:25,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:25,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:25,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:25,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:25,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119338882] [2024-10-14 19:23:25,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119338882] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:23:25,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42273898] [2024-10-14 19:23:25,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:25,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:23:25,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:23:25,538 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) [2024-10-14 19:23:25,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 19:23:25,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:25,713 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:23:25,715 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:23:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:23:25,756 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:23:25,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42273898] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:25,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 19:23:25,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-10-14 19:23:25,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148875155] [2024-10-14 19:23:25,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:25,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:23:25,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:23:25,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:23:25,764 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-14 19:23:25,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 83 transitions, 523 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2024-10-14 19:23:25,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:25,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-14 19:23:25,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:26,576 INFO L124 PetriNetUnfolderBase]: 3504/7051 cut-off events. [2024-10-14 19:23:26,577 INFO L125 PetriNetUnfolderBase]: For 6627/6627 co-relation queries the response was YES. [2024-10-14 19:23:26,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20247 conditions, 7051 events. 3504/7051 cut-off events. For 6627/6627 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 45906 event pairs, 2843 based on Foata normal form. 19/6840 useless extension candidates. Maximal degree in co-relation 16638. Up to 6094 conditions per place. [2024-10-14 19:23:26,621 INFO L140 encePairwiseOnDemand]: 52/54 looper letters, 69 selfloop transitions, 1 changer transitions 2/82 dead transitions. [2024-10-14 19:23:26,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 82 transitions, 663 flow [2024-10-14 19:23:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:23:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:23:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-10-14 19:23:26,623 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-10-14 19:23:26,623 INFO L175 Difference]: Start difference. First operand has 103 places, 83 transitions, 523 flow. Second operand 3 states and 77 transitions. [2024-10-14 19:23:26,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 82 transitions, 663 flow [2024-10-14 19:23:26,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 82 transitions, 643 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-10-14 19:23:26,647 INFO L231 Difference]: Finished difference. Result has 97 places, 80 transitions, 498 flow [2024-10-14 19:23:26,647 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=498, PETRI_PLACES=97, PETRI_TRANSITIONS=80} [2024-10-14 19:23:26,648 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 48 predicate places. [2024-10-14 19:23:26,648 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 80 transitions, 498 flow [2024-10-14 19:23:26,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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) [2024-10-14 19:23:26,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:26,649 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:26,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-14 19:23:26,852 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,SelfDestructingSolverStorable10 [2024-10-14 19:23:26,853 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:26,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:26,854 INFO L85 PathProgramCache]: Analyzing trace with hash 174056194, now seen corresponding path program 1 times [2024-10-14 19:23:26,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:26,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299292776] [2024-10-14 19:23:26,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:26,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:27,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:27,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299292776] [2024-10-14 19:23:27,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299292776] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:23:27,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877535249] [2024-10-14 19:23:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:27,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:23:27,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:23:27,205 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) [2024-10-14 19:23:27,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-14 19:23:27,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:27,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-14 19:23:27,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:23:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:27,709 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:23:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:27,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877535249] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:23:27,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:23:27,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-10-14 19:23:27,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945728534] [2024-10-14 19:23:27,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:23:27,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 19:23:27,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:27,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 19:23:27,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-10-14 19:23:28,074 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-14 19:23:28,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 80 transitions, 498 flow. Second operand has 18 states, 18 states have (on average 18.166666666666668) internal successors, (327), 18 states have internal predecessors, (327), 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) [2024-10-14 19:23:28,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:28,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-14 19:23:28,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:30,612 INFO L124 PetriNetUnfolderBase]: 7062/14003 cut-off events. [2024-10-14 19:23:30,612 INFO L125 PetriNetUnfolderBase]: For 12617/12621 co-relation queries the response was YES. [2024-10-14 19:23:30,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39808 conditions, 14003 events. 7062/14003 cut-off events. For 12617/12621 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 98266 event pairs, 902 based on Foata normal form. 154/13703 useless extension candidates. Maximal degree in co-relation 39772. Up to 2318 conditions per place. [2024-10-14 19:23:30,692 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 317 selfloop transitions, 60 changer transitions 0/385 dead transitions. [2024-10-14 19:23:30,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 385 transitions, 2676 flow [2024-10-14 19:23:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 19:23:30,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-14 19:23:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 600 transitions. [2024-10-14 19:23:30,695 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-10-14 19:23:30,695 INFO L175 Difference]: Start difference. First operand has 97 places, 80 transitions, 498 flow. Second operand 21 states and 600 transitions. [2024-10-14 19:23:30,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 385 transitions, 2676 flow [2024-10-14 19:23:30,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 385 transitions, 2673 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 19:23:30,759 INFO L231 Difference]: Finished difference. Result has 127 places, 124 transitions, 1031 flow [2024-10-14 19:23:30,760 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1031, PETRI_PLACES=127, PETRI_TRANSITIONS=124} [2024-10-14 19:23:30,760 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 78 predicate places. [2024-10-14 19:23:30,761 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 124 transitions, 1031 flow [2024-10-14 19:23:30,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.166666666666668) internal successors, (327), 18 states have internal predecessors, (327), 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) [2024-10-14 19:23:30,761 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:30,761 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:30,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-14 19:23:30,962 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:23:30,962 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:30,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1119191721, now seen corresponding path program 1 times [2024-10-14 19:23:30,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:30,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902284806] [2024-10-14 19:23:30,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:30,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:31,821 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:31,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:31,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902284806] [2024-10-14 19:23:31,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902284806] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:23:31,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492860141] [2024-10-14 19:23:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:31,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:23:31,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:23:31,825 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) [2024-10-14 19:23:31,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-14 19:23:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:31,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-14 19:23:31,935 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:23:32,137 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 25 treesize of output 1 [2024-10-14 19:23:32,301 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 80 treesize of output 32 [2024-10-14 19:23:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 19:23:32,415 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:23:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492860141] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:32,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-14 19:23:32,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2024-10-14 19:23:32,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824536943] [2024-10-14 19:23:32,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:32,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:23:32,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:32,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:23:32,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2024-10-14 19:23:32,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-14 19:23:32,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 124 transitions, 1031 flow. Second operand has 10 states, 10 states have (on average 18.6) internal successors, (186), 10 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) [2024-10-14 19:23:32,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:32,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-14 19:23:32,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:35,787 INFO L124 PetriNetUnfolderBase]: 10165/20131 cut-off events. [2024-10-14 19:23:35,787 INFO L125 PetriNetUnfolderBase]: For 33551/33551 co-relation queries the response was YES. [2024-10-14 19:23:35,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63260 conditions, 20131 events. 10165/20131 cut-off events. For 33551/33551 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 153154 event pairs, 1401 based on Foata normal form. 0/19589 useless extension candidates. Maximal degree in co-relation 63210. Up to 4323 conditions per place. [2024-10-14 19:23:36,106 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 148 selfloop transitions, 142 changer transitions 0/300 dead transitions. [2024-10-14 19:23:36,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 300 transitions, 2676 flow [2024-10-14 19:23:36,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-14 19:23:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-14 19:23:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 416 transitions. [2024-10-14 19:23:36,108 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4531590413943355 [2024-10-14 19:23:36,109 INFO L175 Difference]: Start difference. First operand has 127 places, 124 transitions, 1031 flow. Second operand 17 states and 416 transitions. [2024-10-14 19:23:36,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 300 transitions, 2676 flow [2024-10-14 19:23:36,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 300 transitions, 2519 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-10-14 19:23:36,303 INFO L231 Difference]: Finished difference. Result has 144 places, 191 transitions, 1936 flow [2024-10-14 19:23:36,303 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1936, PETRI_PLACES=144, PETRI_TRANSITIONS=191} [2024-10-14 19:23:36,304 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 95 predicate places. [2024-10-14 19:23:36,305 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 191 transitions, 1936 flow [2024-10-14 19:23:36,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.6) internal successors, (186), 10 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) [2024-10-14 19:23:36,305 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:36,306 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:36,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-14 19:23:36,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:23:36,509 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:36,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:36,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1831036496, now seen corresponding path program 1 times [2024-10-14 19:23:36,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:36,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851611181] [2024-10-14 19:23:36,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:36,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:36,927 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:23:36,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:36,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851611181] [2024-10-14 19:23:36,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851611181] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:23:36,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939692371] [2024-10-14 19:23:36,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:36,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:23:36,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:23:36,932 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) [2024-10-14 19:23:36,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-14 19:23:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:37,050 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-14 19:23:37,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:23:37,410 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:23:37,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:23:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:23:37,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939692371] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:23:37,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:23:37,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-10-14 19:23:37,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320021547] [2024-10-14 19:23:37,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:23:37,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-14 19:23:37,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-14 19:23:37,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-10-14 19:23:37,934 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-14 19:23:37,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 191 transitions, 1936 flow. Second operand has 19 states, 19 states have (on average 19.05263157894737) internal successors, (362), 19 states have internal predecessors, (362), 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) [2024-10-14 19:23:37,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:37,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-14 19:23:37,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:41,573 INFO L124 PetriNetUnfolderBase]: 10541/20509 cut-off events. [2024-10-14 19:23:41,573 INFO L125 PetriNetUnfolderBase]: For 38910/38920 co-relation queries the response was YES. [2024-10-14 19:23:41,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67377 conditions, 20509 events. 10541/20509 cut-off events. For 38910/38920 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 151698 event pairs, 1963 based on Foata normal form. 148/20195 useless extension candidates. Maximal degree in co-relation 67324. Up to 3480 conditions per place. [2024-10-14 19:23:41,710 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 394 selfloop transitions, 149 changer transitions 0/551 dead transitions. [2024-10-14 19:23:41,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 551 transitions, 5179 flow [2024-10-14 19:23:41,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-14 19:23:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-10-14 19:23:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 684 transitions. [2024-10-14 19:23:41,714 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-10-14 19:23:41,714 INFO L175 Difference]: Start difference. First operand has 144 places, 191 transitions, 1936 flow. Second operand 25 states and 684 transitions. [2024-10-14 19:23:41,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 551 transitions, 5179 flow [2024-10-14 19:23:41,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 551 transitions, 4750 flow, removed 214 selfloop flow, removed 1 redundant places. [2024-10-14 19:23:41,966 INFO L231 Difference]: Finished difference. Result has 179 places, 268 transitions, 2938 flow [2024-10-14 19:23:41,967 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1743, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2938, PETRI_PLACES=179, PETRI_TRANSITIONS=268} [2024-10-14 19:23:41,967 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 130 predicate places. [2024-10-14 19:23:41,967 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 268 transitions, 2938 flow [2024-10-14 19:23:41,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.05263157894737) internal successors, (362), 19 states have internal predecessors, (362), 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) [2024-10-14 19:23:41,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:41,968 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:41,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-14 19:23:42,168 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,SelfDestructingSolverStorable13 [2024-10-14 19:23:42,168 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:42,169 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:42,169 INFO L85 PathProgramCache]: Analyzing trace with hash 423730696, now seen corresponding path program 1 times [2024-10-14 19:23:42,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:42,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651528685] [2024-10-14 19:23:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:42,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:42,264 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:42,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:42,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651528685] [2024-10-14 19:23:42,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651528685] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:23:42,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697032724] [2024-10-14 19:23:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:42,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:23:42,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:23:42,267 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) [2024-10-14 19:23:42,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-14 19:23:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:42,382 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:23:42,384 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:23:42,428 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:42,429 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:23:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:42,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697032724] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:23:42,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:23:42,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-10-14 19:23:42,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694561786] [2024-10-14 19:23:42,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:23:42,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 19:23:42,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:42,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 19:23:42,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-10-14 19:23:42,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-14 19:23:42,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 268 transitions, 2938 flow. Second operand has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 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) [2024-10-14 19:23:42,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:42,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-14 19:23:42,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:47,988 INFO L124 PetriNetUnfolderBase]: 16525/32600 cut-off events. [2024-10-14 19:23:47,989 INFO L125 PetriNetUnfolderBase]: For 82873/82892 co-relation queries the response was YES. [2024-10-14 19:23:48,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110190 conditions, 32600 events. 16525/32600 cut-off events. For 82873/82892 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 263371 event pairs, 5215 based on Foata normal form. 1024/33268 useless extension candidates. Maximal degree in co-relation 110124. Up to 6140 conditions per place. [2024-10-14 19:23:48,339 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 514 selfloop transitions, 146 changer transitions 0/669 dead transitions. [2024-10-14 19:23:48,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 669 transitions, 7981 flow [2024-10-14 19:23:48,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-14 19:23:48,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-14 19:23:48,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 293 transitions. [2024-10-14 19:23:48,342 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6782407407407407 [2024-10-14 19:23:48,342 INFO L175 Difference]: Start difference. First operand has 179 places, 268 transitions, 2938 flow. Second operand 8 states and 293 transitions. [2024-10-14 19:23:48,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 669 transitions, 7981 flow [2024-10-14 19:23:49,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 669 transitions, 7482 flow, removed 201 selfloop flow, removed 9 redundant places. [2024-10-14 19:23:49,266 INFO L231 Difference]: Finished difference. Result has 183 places, 347 transitions, 4335 flow [2024-10-14 19:23:49,266 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2468, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4335, PETRI_PLACES=183, PETRI_TRANSITIONS=347} [2024-10-14 19:23:49,267 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 134 predicate places. [2024-10-14 19:23:49,267 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 347 transitions, 4335 flow [2024-10-14 19:23:49,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 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) [2024-10-14 19:23:49,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:49,267 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:23:49,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-14 19:23:49,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-10-14 19:23:49,468 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:49,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:49,469 INFO L85 PathProgramCache]: Analyzing trace with hash 2076465584, now seen corresponding path program 1 times [2024-10-14 19:23:49,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:49,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768970080] [2024-10-14 19:23:49,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:49,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-14 19:23:49,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:49,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768970080] [2024-10-14 19:23:49,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768970080] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:23:49,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:23:49,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:23:49,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754337872] [2024-10-14 19:23:49,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:23:49,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:23:49,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:49,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:23:49,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:23:49,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-14 19:23:49,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 347 transitions, 4335 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:49,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:49,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-14 19:23:49,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:23:54,553 INFO L124 PetriNetUnfolderBase]: 14877/29147 cut-off events. [2024-10-14 19:23:54,554 INFO L125 PetriNetUnfolderBase]: For 87361/87400 co-relation queries the response was YES. [2024-10-14 19:23:54,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103770 conditions, 29147 events. 14877/29147 cut-off events. For 87361/87400 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 230036 event pairs, 10197 based on Foata normal form. 490/29449 useless extension candidates. Maximal degree in co-relation 103704. Up to 21010 conditions per place. [2024-10-14 19:23:55,104 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 296 selfloop transitions, 72 changer transitions 0/377 dead transitions. [2024-10-14 19:23:55,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 377 transitions, 5236 flow [2024-10-14 19:23:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:23:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:23:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-10-14 19:23:55,105 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-10-14 19:23:55,105 INFO L175 Difference]: Start difference. First operand has 183 places, 347 transitions, 4335 flow. Second operand 3 states and 96 transitions. [2024-10-14 19:23:55,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 377 transitions, 5236 flow [2024-10-14 19:23:55,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 377 transitions, 5156 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-10-14 19:23:55,560 INFO L231 Difference]: Finished difference. Result has 183 places, 329 transitions, 4312 flow [2024-10-14 19:23:55,560 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4312, PETRI_PLACES=183, PETRI_TRANSITIONS=329} [2024-10-14 19:23:55,560 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 134 predicate places. [2024-10-14 19:23:55,560 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 329 transitions, 4312 flow [2024-10-14 19:23:55,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:23:55,560 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:23:55,561 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 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] [2024-10-14 19:23:55,561 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-14 19:23:55,561 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:23:55,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:23:55,561 INFO L85 PathProgramCache]: Analyzing trace with hash -850781396, now seen corresponding path program 1 times [2024-10-14 19:23:55,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:23:55,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637906013] [2024-10-14 19:23:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:55,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:23:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:56,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:23:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637906013] [2024-10-14 19:23:56,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637906013] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:23:56,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464097818] [2024-10-14 19:23:56,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:23:56,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:23:56,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:23:56,413 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) [2024-10-14 19:23:56,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-14 19:23:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:23:56,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-14 19:23:56,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:23:56,651 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 25 treesize of output 1 [2024-10-14 19:23:56,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:23:56,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 19 [2024-10-14 19:23:57,010 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 80 treesize of output 32 [2024-10-14 19:23:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:57,093 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:23:57,647 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 54 treesize of output 46 [2024-10-14 19:23:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:23:57,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464097818] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:23:57,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:23:57,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-10-14 19:23:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776500006] [2024-10-14 19:23:57,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:23:57,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-14 19:23:57,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:23:57,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-14 19:23:57,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2024-10-14 19:23:58,296 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-14 19:23:58,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 329 transitions, 4312 flow. Second operand has 35 states, 35 states have (on average 18.0) internal successors, (630), 35 states have internal predecessors, (630), 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) [2024-10-14 19:23:58,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:23:58,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-14 19:23:58,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:24:07,674 INFO L124 PetriNetUnfolderBase]: 19025/37405 cut-off events. [2024-10-14 19:24:07,674 INFO L125 PetriNetUnfolderBase]: For 118361/118361 co-relation queries the response was YES. [2024-10-14 19:24:07,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134638 conditions, 37405 events. 19025/37405 cut-off events. For 118361/118361 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 299280 event pairs, 2508 based on Foata normal form. 0/37224 useless extension candidates. Maximal degree in co-relation 134574. Up to 7257 conditions per place. [2024-10-14 19:24:08,019 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 371 selfloop transitions, 385 changer transitions 26/791 dead transitions. [2024-10-14 19:24:08,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 791 transitions, 8724 flow [2024-10-14 19:24:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-14 19:24:08,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-10-14 19:24:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1212 transitions. [2024-10-14 19:24:08,023 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4156378600823045 [2024-10-14 19:24:08,023 INFO L175 Difference]: Start difference. First operand has 183 places, 329 transitions, 4312 flow. Second operand 54 states and 1212 transitions. [2024-10-14 19:24:08,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 791 transitions, 8724 flow [2024-10-14 19:24:09,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 791 transitions, 8430 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-10-14 19:24:09,040 INFO L231 Difference]: Finished difference. Result has 239 places, 435 transitions, 6271 flow [2024-10-14 19:24:09,041 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=6271, PETRI_PLACES=239, PETRI_TRANSITIONS=435} [2024-10-14 19:24:09,041 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 190 predicate places. [2024-10-14 19:24:09,041 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 435 transitions, 6271 flow [2024-10-14 19:24:09,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 18.0) internal successors, (630), 35 states have internal predecessors, (630), 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) [2024-10-14 19:24:09,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:24:09,042 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:24:09,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-14 19:24:09,246 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:24:09,247 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 12 more)] === [2024-10-14 19:24:09,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:24:09,248 INFO L85 PathProgramCache]: Analyzing trace with hash -917738821, now seen corresponding path program 1 times [2024-10-14 19:24:09,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 19:24:09,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484480235] [2024-10-14 19:24:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:24:09,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 19:24:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:24:09,697 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:24:09,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 19:24:09,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484480235] [2024-10-14 19:24:09,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484480235] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 19:24:09,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255331765] [2024-10-14 19:24:09,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:24:09,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 19:24:09,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:24:09,700 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) [2024-10-14 19:24:09,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-14 19:24:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:24:09,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-14 19:24:09,841 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:24:10,285 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:24:10,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:24:10,575 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:24:10,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255331765] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:24:10,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-14 19:24:10,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-10-14 19:24:10,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639919204] [2024-10-14 19:24:10,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-14 19:24:10,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-14 19:24:10,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 19:24:10,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-14 19:24:10,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-10-14 19:24:10,683 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-14 19:24:10,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 435 transitions, 6271 flow. Second operand has 21 states, 21 states have (on average 19.857142857142858) internal successors, (417), 21 states have internal predecessors, (417), 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) [2024-10-14 19:24:10,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:24:10,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-14 19:24:10,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand