./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 4a390ef5 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-dev-4a390ef-m [2024-10-24 18:50:55,832 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 18:50:55,912 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 18:50:55,922 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 18:50:55,926 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 18:50:55,963 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 18:50:55,965 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 18:50:55,965 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 18:50:55,966 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 18:50:55,968 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 18:50:55,968 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 18:50:55,969 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 18:50:55,969 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 18:50:55,970 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 18:50:55,972 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 18:50:55,973 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 18:50:55,973 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 18:50:55,974 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 18:50:55,974 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 18:50:55,974 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 18:50:55,974 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 18:50:55,975 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 18:50:55,979 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 18:50:55,980 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 18:50:55,980 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 18:50:55,980 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 18:50:55,980 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 18:50:55,981 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 18:50:55,981 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 18:50:55,981 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 18:50:55,981 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 18:50:55,982 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 18:50:55,982 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 18:50:55,982 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 18:50:55,982 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 18:50:55,983 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 18:50:55,983 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 18:50:55,983 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 18:50:55,983 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 18:50:55,983 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 18:50:55,984 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 18:50:55,985 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 18:50:55,985 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2024-10-24 18:50:56,285 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 18:50:56,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 18:50:56,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 18:50:56,321 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 18:50:56,322 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 18:50:56,323 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i [2024-10-24 18:50:57,933 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 18:50:58,219 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 18:50:58,220 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/stack-1.i [2024-10-24 18:50:58,242 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d92cc0b58/3e21b95d873a42f1b73c2819191a8377/FLAGb2d83a4fb [2024-10-24 18:50:58,263 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d92cc0b58/3e21b95d873a42f1b73c2819191a8377 [2024-10-24 18:50:58,267 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 18:50:58,269 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 18:50:58,273 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 18:50:58,273 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 18:50:58,279 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 18:50:58,280 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:50:58" (1/1) ... [2024-10-24 18:50:58,281 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49d93284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:58, skipping insertion in model container [2024-10-24 18:50:58,282 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 06:50:58" (1/1) ... [2024-10-24 18:50:58,339 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 18:50:58,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 18:50:58,884 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 18:50:58,971 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 18:50:59,046 INFO L204 MainTranslator]: Completed translation [2024-10-24 18:50:59,047 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59 WrapperNode [2024-10-24 18:50:59,048 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 18:50:59,049 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 18:50:59,049 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 18:50:59,049 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 18:50:59,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (1/1) ... [2024-10-24 18:50:59,083 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (1/1) ... [2024-10-24 18:50:59,128 INFO L138 Inliner]: procedures = 277, calls = 36, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 154 [2024-10-24 18:50:59,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 18:50:59,129 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 18:50:59,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 18:50:59,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 18:50:59,144 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (1/1) ... [2024-10-24 18:50:59,144 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (1/1) ... [2024-10-24 18:50:59,153 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (1/1) ... [2024-10-24 18:50:59,182 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]. [2024-10-24 18:50:59,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (1/1) ... [2024-10-24 18:50:59,186 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (1/1) ... [2024-10-24 18:50:59,192 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (1/1) ... [2024-10-24 18:50:59,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (1/1) ... [2024-10-24 18:50:59,208 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (1/1) ... [2024-10-24 18:50:59,210 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (1/1) ... [2024-10-24 18:50:59,217 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 18:50:59,222 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 18:50:59,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 18:50:59,222 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 18:50:59,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (1/1) ... [2024-10-24 18:50:59,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 18:50:59,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:50:59,275 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) [2024-10-24 18:50:59,277 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 [2024-10-24 18:50:59,317 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-10-24 18:50:59,318 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-10-24 18:50:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-10-24 18:50:59,318 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-10-24 18:50:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-24 18:50:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-24 18:50:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-24 18:50:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-24 18:50:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-24 18:50:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-24 18:50:59,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-24 18:50:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-24 18:50:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 18:50:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-24 18:50:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-24 18:50:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-24 18:50:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 18:50:59,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 18:50:59,322 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 18:50:59,468 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 18:50:59,470 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 18:50:59,785 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 18:50:59,785 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 18:50:59,970 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 18:50:59,973 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-24 18:50:59,973 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:50:59 BoogieIcfgContainer [2024-10-24 18:50:59,974 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 18:50:59,975 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 18:50:59,976 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 18:50:59,979 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 18:50:59,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 06:50:58" (1/3) ... [2024-10-24 18:50:59,981 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31df9b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:50:59, skipping insertion in model container [2024-10-24 18:50:59,981 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 06:50:59" (2/3) ... [2024-10-24 18:50:59,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31df9b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 06:50:59, skipping insertion in model container [2024-10-24 18:50:59,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 06:50:59" (3/3) ... [2024-10-24 18:50:59,985 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2024-10-24 18:51:00,005 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 18:51:00,005 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2024-10-24 18:51:00,006 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 18:51:00,085 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 18:51:00,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 54 transitions, 122 flow [2024-10-24 18:51:00,181 INFO L124 PetriNetUnfolderBase]: 9/52 cut-off events. [2024-10-24 18:51:00,181 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 18:51:00,186 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. [2024-10-24 18:51:00,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 54 transitions, 122 flow [2024-10-24 18:51:00,190 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 51 transitions, 114 flow [2024-10-24 18:51:00,203 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 18:51:00,211 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;@55f1c845, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 18:51:00,211 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-10-24 18:51:00,219 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 18:51:00,219 INFO L124 PetriNetUnfolderBase]: 1/19 cut-off events. [2024-10-24 18:51:00,219 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 18:51:00,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:00,220 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:00,221 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)] === [2024-10-24 18:51:00,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:00,227 INFO L85 PathProgramCache]: Analyzing trace with hash 686360153, now seen corresponding path program 1 times [2024-10-24 18:51:00,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:00,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844273940] [2024-10-24 18:51:00,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:00,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:00,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:00,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844273940] [2024-10-24 18:51:00,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844273940] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:00,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:00,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 18:51:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053780988] [2024-10-24 18:51:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:00,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 18:51:00,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:00,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 18:51:00,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 18:51:00,822 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:00,825 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) [2024-10-24 18:51:00,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:00,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:00,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:01,134 INFO L124 PetriNetUnfolderBase]: 459/866 cut-off events. [2024-10-24 18:51:01,135 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-10-24 18:51:01,138 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. [2024-10-24 18:51:01,147 INFO L140 encePairwiseOnDemand]: 46/54 looper letters, 43 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-10-24 18:51:01,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 225 flow [2024-10-24 18:51:01,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 18:51:01,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 18:51:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-10-24 18:51:01,165 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5231481481481481 [2024-10-24 18:51:01,168 INFO L175 Difference]: Start difference. First operand has 49 places, 51 transitions, 114 flow. Second operand 4 states and 113 transitions. [2024-10-24 18:51:01,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 225 flow [2024-10-24 18:51:01,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 215 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 18:51:01,178 INFO L231 Difference]: Finished difference. Result has 45 places, 44 transitions, 98 flow [2024-10-24 18:51:01,183 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} [2024-10-24 18:51:01,187 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, -4 predicate places. [2024-10-24 18:51:01,190 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 44 transitions, 98 flow [2024-10-24 18:51:01,190 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) [2024-10-24 18:51:01,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:01,190 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:01,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-24 18:51:01,191 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)] === [2024-10-24 18:51:01,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:01,191 INFO L85 PathProgramCache]: Analyzing trace with hash 686360154, now seen corresponding path program 1 times [2024-10-24 18:51:01,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:01,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147548875] [2024-10-24 18:51:01,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:01,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:01,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:01,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147548875] [2024-10-24 18:51:01,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147548875] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:01,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:01,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:01,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584949024] [2024-10-24 18:51:01,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:01,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 18:51:01,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:01,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 18:51:01,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:51:01,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:01,590 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) [2024-10-24 18:51:01,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:01,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:01,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:02,003 INFO L124 PetriNetUnfolderBase]: 574/1064 cut-off events. [2024-10-24 18:51:02,004 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-10-24 18:51:02,009 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. [2024-10-24 18:51:02,018 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 59 selfloop transitions, 4 changer transitions 0/75 dead transitions. [2024-10-24 18:51:02,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 75 transitions, 293 flow [2024-10-24 18:51:02,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 18:51:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 18:51:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-24 18:51:02,022 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5296296296296297 [2024-10-24 18:51:02,022 INFO L175 Difference]: Start difference. First operand has 45 places, 44 transitions, 98 flow. Second operand 5 states and 143 transitions. [2024-10-24 18:51:02,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 75 transitions, 293 flow [2024-10-24 18:51:02,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 75 transitions, 285 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 18:51:02,028 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 128 flow [2024-10-24 18:51:02,029 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} [2024-10-24 18:51:02,030 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 0 predicate places. [2024-10-24 18:51:02,030 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 128 flow [2024-10-24 18:51:02,031 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) [2024-10-24 18:51:02,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:02,032 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:02,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-24 18:51:02,033 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)] === [2024-10-24 18:51:02,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:02,033 INFO L85 PathProgramCache]: Analyzing trace with hash -423406336, now seen corresponding path program 1 times [2024-10-24 18:51:02,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:02,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822847446] [2024-10-24 18:51:02,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:02,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:02,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:02,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822847446] [2024-10-24 18:51:02,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822847446] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:02,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:02,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 18:51:02,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771138812] [2024-10-24 18:51:02,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:02,122 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 18:51:02,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 18:51:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 18:51:02,124 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:02,125 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) [2024-10-24 18:51:02,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:02,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:02,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:02,422 INFO L124 PetriNetUnfolderBase]: 823/1511 cut-off events. [2024-10-24 18:51:02,423 INFO L125 PetriNetUnfolderBase]: For 263/266 co-relation queries the response was YES. [2024-10-24 18:51:02,425 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. [2024-10-24 18:51:02,432 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 68 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2024-10-24 18:51:02,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 86 transitions, 370 flow [2024-10-24 18:51:02,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 18:51:02,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 18:51:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-10-24 18:51:02,435 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-24 18:51:02,435 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 128 flow. Second operand 4 states and 135 transitions. [2024-10-24 18:51:02,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 86 transitions, 370 flow [2024-10-24 18:51:02,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 86 transitions, 368 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:02,438 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 159 flow [2024-10-24 18:51:02,439 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} [2024-10-24 18:51:02,439 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 4 predicate places. [2024-10-24 18:51:02,440 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 159 flow [2024-10-24 18:51:02,440 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) [2024-10-24 18:51:02,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:02,440 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:02,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-24 18:51:02,441 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)] === [2024-10-24 18:51:02,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:02,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1635275436, now seen corresponding path program 1 times [2024-10-24 18:51:02,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:02,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641581592] [2024-10-24 18:51:02,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:02,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:02,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:02,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641581592] [2024-10-24 18:51:02,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641581592] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:02,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:02,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:02,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552414253] [2024-10-24 18:51:02,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:02,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:02,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:02,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:02,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:51:02,476 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:02,476 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) [2024-10-24 18:51:02,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:02,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:02,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:02,708 INFO L124 PetriNetUnfolderBase]: 957/1715 cut-off events. [2024-10-24 18:51:02,709 INFO L125 PetriNetUnfolderBase]: For 546/548 co-relation queries the response was YES. [2024-10-24 18:51:02,714 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. [2024-10-24 18:51:02,723 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 55 selfloop transitions, 2 changer transitions 0/70 dead transitions. [2024-10-24 18:51:02,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 328 flow [2024-10-24 18:51:02,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-10-24 18:51:02,726 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6358024691358025 [2024-10-24 18:51:02,728 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 159 flow. Second operand 3 states and 103 transitions. [2024-10-24 18:51:02,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 328 flow [2024-10-24 18:51:02,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:02,735 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 168 flow [2024-10-24 18:51:02,736 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} [2024-10-24 18:51:02,737 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 6 predicate places. [2024-10-24 18:51:02,738 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 168 flow [2024-10-24 18:51:02,739 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) [2024-10-24 18:51:02,739 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:02,739 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:02,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-24 18:51:02,739 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)] === [2024-10-24 18:51:02,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash 907179489, now seen corresponding path program 1 times [2024-10-24 18:51:02,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:02,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884200069] [2024-10-24 18:51:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:02,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:02,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:02,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884200069] [2024-10-24 18:51:02,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884200069] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:02,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:02,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:02,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932260286] [2024-10-24 18:51:02,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:02,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:02,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:02,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:02,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:51:02,854 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:02,855 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) [2024-10-24 18:51:02,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:02,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:02,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:03,034 INFO L124 PetriNetUnfolderBase]: 499/1033 cut-off events. [2024-10-24 18:51:03,034 INFO L125 PetriNetUnfolderBase]: For 250/250 co-relation queries the response was YES. [2024-10-24 18:51:03,039 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. [2024-10-24 18:51:03,044 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 45 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-10-24 18:51:03,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 62 transitions, 300 flow [2024-10-24 18:51:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-10-24 18:51:03,048 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5617283950617284 [2024-10-24 18:51:03,048 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 168 flow. Second operand 3 states and 91 transitions. [2024-10-24 18:51:03,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 62 transitions, 300 flow [2024-10-24 18:51:03,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 62 transitions, 292 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:03,056 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 170 flow [2024-10-24 18:51:03,058 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} [2024-10-24 18:51:03,058 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2024-10-24 18:51:03,061 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 170 flow [2024-10-24 18:51:03,061 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) [2024-10-24 18:51:03,061 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:03,062 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:03,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-24 18:51:03,062 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)] === [2024-10-24 18:51:03,062 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:03,062 INFO L85 PathProgramCache]: Analyzing trace with hash 704836300, now seen corresponding path program 1 times [2024-10-24 18:51:03,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:03,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729064418] [2024-10-24 18:51:03,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:03,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:03,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:03,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:03,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729064418] [2024-10-24 18:51:03,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729064418] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:03,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389642063] [2024-10-24 18:51:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:03,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:03,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:03,416 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) [2024-10-24 18:51:03,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-24 18:51:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:03,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-24 18:51:03,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:03,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:03,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389642063] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:03,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:03,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2024-10-24 18:51:03,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703173645] [2024-10-24 18:51:03,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:03,994 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-24 18:51:03,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:03,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-24 18:51:03,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-10-24 18:51:04,079 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:51:04,080 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) [2024-10-24 18:51:04,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:04,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:51:04,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:05,093 INFO L124 PetriNetUnfolderBase]: 1740/3509 cut-off events. [2024-10-24 18:51:05,093 INFO L125 PetriNetUnfolderBase]: For 796/796 co-relation queries the response was YES. [2024-10-24 18:51:05,104 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. [2024-10-24 18:51:05,121 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 194 selfloop transitions, 26 changer transitions 0/231 dead transitions. [2024-10-24 18:51:05,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 231 transitions, 1170 flow [2024-10-24 18:51:05,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-10-24 18:51:05,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-10-24 18:51:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 425 transitions. [2024-10-24 18:51:05,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5246913580246914 [2024-10-24 18:51:05,124 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 170 flow. Second operand 15 states and 425 transitions. [2024-10-24 18:51:05,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 231 transitions, 1170 flow [2024-10-24 18:51:05,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 231 transitions, 1148 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:05,131 INFO L231 Difference]: Finished difference. Result has 81 places, 75 transitions, 417 flow [2024-10-24 18:51:05,131 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} [2024-10-24 18:51:05,132 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2024-10-24 18:51:05,132 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 75 transitions, 417 flow [2024-10-24 18:51:05,133 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) [2024-10-24 18:51:05,133 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:05,133 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] [2024-10-24 18:51:05,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-10-24 18:51:05,334 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 [2024-10-24 18:51:05,335 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)] === [2024-10-24 18:51:05,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1089354263, now seen corresponding path program 1 times [2024-10-24 18:51:05,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:05,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561409043] [2024-10-24 18:51:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:05,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:05,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:05,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561409043] [2024-10-24 18:51:05,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561409043] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:05,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:05,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 18:51:05,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399413365] [2024-10-24 18:51:05,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:05,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 18:51:05,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 18:51:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 18:51:05,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:05,440 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) [2024-10-24 18:51:05,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:05,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:05,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:05,888 INFO L124 PetriNetUnfolderBase]: 1695/3429 cut-off events. [2024-10-24 18:51:05,889 INFO L125 PetriNetUnfolderBase]: For 1886/1886 co-relation queries the response was YES. [2024-10-24 18:51:05,903 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. [2024-10-24 18:51:05,922 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 64 selfloop transitions, 3 changer transitions 0/79 dead transitions. [2024-10-24 18:51:05,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 79 transitions, 566 flow [2024-10-24 18:51:05,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 18:51:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 18:51:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-10-24 18:51:05,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-24 18:51:05,924 INFO L175 Difference]: Start difference. First operand has 81 places, 75 transitions, 417 flow. Second operand 4 states and 96 transitions. [2024-10-24 18:51:05,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 79 transitions, 566 flow [2024-10-24 18:51:05,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 79 transitions, 556 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-10-24 18:51:05,940 INFO L231 Difference]: Finished difference. Result has 83 places, 74 transitions, 411 flow [2024-10-24 18:51:05,941 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} [2024-10-24 18:51:05,942 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2024-10-24 18:51:05,943 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 74 transitions, 411 flow [2024-10-24 18:51:05,943 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) [2024-10-24 18:51:05,943 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:05,943 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] [2024-10-24 18:51:05,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-24 18:51:05,943 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)] === [2024-10-24 18:51:05,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:05,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1748660898, now seen corresponding path program 1 times [2024-10-24 18:51:05,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:05,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092629188] [2024-10-24 18:51:05,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:05,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:06,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:06,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092629188] [2024-10-24 18:51:06,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092629188] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:06,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:06,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 18:51:06,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994934100] [2024-10-24 18:51:06,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:06,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 18:51:06,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:06,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 18:51:06,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-10-24 18:51:06,354 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:06,354 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) [2024-10-24 18:51:06,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:06,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:06,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:06,997 INFO L124 PetriNetUnfolderBase]: 1780/3573 cut-off events. [2024-10-24 18:51:06,998 INFO L125 PetriNetUnfolderBase]: For 2161/2161 co-relation queries the response was YES. [2024-10-24 18:51:07,009 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. [2024-10-24 18:51:07,028 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 100 selfloop transitions, 7 changer transitions 0/118 dead transitions. [2024-10-24 18:51:07,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 118 transitions, 776 flow [2024-10-24 18:51:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-24 18:51:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-24 18:51:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-10-24 18:51:07,033 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4894179894179894 [2024-10-24 18:51:07,033 INFO L175 Difference]: Start difference. First operand has 83 places, 74 transitions, 411 flow. Second operand 7 states and 185 transitions. [2024-10-24 18:51:07,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 118 transitions, 776 flow [2024-10-24 18:51:07,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 118 transitions, 768 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 18:51:07,051 INFO L231 Difference]: Finished difference. Result has 89 places, 78 transitions, 458 flow [2024-10-24 18:51:07,051 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} [2024-10-24 18:51:07,052 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2024-10-24 18:51:07,052 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 78 transitions, 458 flow [2024-10-24 18:51:07,053 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) [2024-10-24 18:51:07,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:07,053 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] [2024-10-24 18:51:07,053 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-24 18:51:07,054 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)] === [2024-10-24 18:51:07,054 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:07,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1117590170, now seen corresponding path program 1 times [2024-10-24 18:51:07,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:07,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795704985] [2024-10-24 18:51:07,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:07,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:07,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:07,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795704985] [2024-10-24 18:51:07,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795704985] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:07,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:07,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:07,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146744215] [2024-10-24 18:51:07,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:07,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:07,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:07,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:07,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:51:07,094 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:07,095 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) [2024-10-24 18:51:07,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:07,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:07,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:07,798 INFO L124 PetriNetUnfolderBase]: 2658/5549 cut-off events. [2024-10-24 18:51:07,799 INFO L125 PetriNetUnfolderBase]: For 3888/3888 co-relation queries the response was YES. [2024-10-24 18:51:07,812 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. [2024-10-24 18:51:07,832 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 121 selfloop transitions, 2 changer transitions 0/135 dead transitions. [2024-10-24 18:51:07,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 135 transitions, 1088 flow [2024-10-24 18:51:07,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:07,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:07,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-10-24 18:51:07,833 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6419753086419753 [2024-10-24 18:51:07,833 INFO L175 Difference]: Start difference. First operand has 89 places, 78 transitions, 458 flow. Second operand 3 states and 104 transitions. [2024-10-24 18:51:07,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 135 transitions, 1088 flow [2024-10-24 18:51:07,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 135 transitions, 1072 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-24 18:51:07,853 INFO L231 Difference]: Finished difference. Result has 89 places, 79 transitions, 461 flow [2024-10-24 18:51:07,853 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} [2024-10-24 18:51:07,854 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 40 predicate places. [2024-10-24 18:51:07,855 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 79 transitions, 461 flow [2024-10-24 18:51:07,855 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) [2024-10-24 18:51:07,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:07,856 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] [2024-10-24 18:51:07,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-24 18:51:07,858 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)] === [2024-10-24 18:51:07,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:07,859 INFO L85 PathProgramCache]: Analyzing trace with hash -455977335, now seen corresponding path program 1 times [2024-10-24 18:51:07,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:07,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828770492] [2024-10-24 18:51:07,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:07,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:08,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:08,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828770492] [2024-10-24 18:51:08,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828770492] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:08,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:08,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-10-24 18:51:08,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130959458] [2024-10-24 18:51:08,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:08,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 18:51:08,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:08,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 18:51:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-10-24 18:51:08,703 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:08,704 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) [2024-10-24 18:51:08,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:08,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:08,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:10,157 INFO L124 PetriNetUnfolderBase]: 3462/7028 cut-off events. [2024-10-24 18:51:10,157 INFO L125 PetriNetUnfolderBase]: For 5748/5748 co-relation queries the response was YES. [2024-10-24 18:51:10,182 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. [2024-10-24 18:51:10,215 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 165 selfloop transitions, 12 changer transitions 0/189 dead transitions. [2024-10-24 18:51:10,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 189 transitions, 1335 flow [2024-10-24 18:51:10,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 18:51:10,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 18:51:10,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 319 transitions. [2024-10-24 18:51:10,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49228395061728397 [2024-10-24 18:51:10,218 INFO L175 Difference]: Start difference. First operand has 89 places, 79 transitions, 461 flow. Second operand 12 states and 319 transitions. [2024-10-24 18:51:10,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 189 transitions, 1335 flow [2024-10-24 18:51:10,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 189 transitions, 1323 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:10,241 INFO L231 Difference]: Finished difference. Result has 103 places, 83 transitions, 523 flow [2024-10-24 18:51:10,242 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} [2024-10-24 18:51:10,242 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 54 predicate places. [2024-10-24 18:51:10,243 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 83 transitions, 523 flow [2024-10-24 18:51:10,243 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) [2024-10-24 18:51:10,243 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:10,243 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] [2024-10-24 18:51:10,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-24 18:51:10,244 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)] === [2024-10-24 18:51:10,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:10,244 INFO L85 PathProgramCache]: Analyzing trace with hash -997094798, now seen corresponding path program 1 times [2024-10-24 18:51:10,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:10,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736844380] [2024-10-24 18:51:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:10,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:10,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:10,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:10,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736844380] [2024-10-24 18:51:10,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736844380] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:10,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236685837] [2024-10-24 18:51:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:10,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:10,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:10,299 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) [2024-10-24 18:51:10,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-24 18:51:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:10,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 18:51:10,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:10,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 18:51:10,445 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 18:51:10,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236685837] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:10,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 18:51:10,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2024-10-24 18:51:10,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998720920] [2024-10-24 18:51:10,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:10,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:10,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:10,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:10,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 18:51:10,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:10,453 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) [2024-10-24 18:51:10,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:10,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:10,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:11,428 INFO L124 PetriNetUnfolderBase]: 3504/7051 cut-off events. [2024-10-24 18:51:11,428 INFO L125 PetriNetUnfolderBase]: For 6627/6627 co-relation queries the response was YES. [2024-10-24 18:51:11,455 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. [2024-10-24 18:51:11,487 INFO L140 encePairwiseOnDemand]: 52/54 looper letters, 69 selfloop transitions, 1 changer transitions 2/82 dead transitions. [2024-10-24 18:51:11,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 82 transitions, 663 flow [2024-10-24 18:51:11,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-10-24 18:51:11,489 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-10-24 18:51:11,489 INFO L175 Difference]: Start difference. First operand has 103 places, 83 transitions, 523 flow. Second operand 3 states and 77 transitions. [2024-10-24 18:51:11,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 82 transitions, 663 flow [2024-10-24 18:51:11,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 82 transitions, 643 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-10-24 18:51:11,585 INFO L231 Difference]: Finished difference. Result has 97 places, 80 transitions, 498 flow [2024-10-24 18:51:11,586 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} [2024-10-24 18:51:11,587 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 48 predicate places. [2024-10-24 18:51:11,588 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 80 transitions, 498 flow [2024-10-24 18:51:11,588 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) [2024-10-24 18:51:11,588 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:11,588 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] [2024-10-24 18:51:11,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-24 18:51:11,792 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 [2024-10-24 18:51:11,794 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)] === [2024-10-24 18:51:11,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:11,795 INFO L85 PathProgramCache]: Analyzing trace with hash 174056194, now seen corresponding path program 1 times [2024-10-24 18:51:11,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:11,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818943924] [2024-10-24 18:51:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:11,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:12,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:12,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818943924] [2024-10-24 18:51:12,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818943924] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:12,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520500264] [2024-10-24 18:51:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:12,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:12,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:12,131 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) [2024-10-24 18:51:12,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-24 18:51:12,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:12,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-24 18:51:12,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:12,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:12,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:12,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520500264] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:12,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:12,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-10-24 18:51:12,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112878851] [2024-10-24 18:51:12,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:12,859 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 18:51:12,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:12,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 18:51:12,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-10-24 18:51:12,984 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:51:12,984 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) [2024-10-24 18:51:12,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:12,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:51:12,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:15,837 INFO L124 PetriNetUnfolderBase]: 7062/14003 cut-off events. [2024-10-24 18:51:15,837 INFO L125 PetriNetUnfolderBase]: For 12617/12621 co-relation queries the response was YES. [2024-10-24 18:51:15,906 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. [2024-10-24 18:51:15,974 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 317 selfloop transitions, 60 changer transitions 0/385 dead transitions. [2024-10-24 18:51:15,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 385 transitions, 2676 flow [2024-10-24 18:51:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 18:51:15,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-24 18:51:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 600 transitions. [2024-10-24 18:51:15,977 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5291005291005291 [2024-10-24 18:51:15,977 INFO L175 Difference]: Start difference. First operand has 97 places, 80 transitions, 498 flow. Second operand 21 states and 600 transitions. [2024-10-24 18:51:15,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 385 transitions, 2676 flow [2024-10-24 18:51:16,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 385 transitions, 2673 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:16,049 INFO L231 Difference]: Finished difference. Result has 127 places, 124 transitions, 1031 flow [2024-10-24 18:51:16,050 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} [2024-10-24 18:51:16,052 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 78 predicate places. [2024-10-24 18:51:16,053 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 124 transitions, 1031 flow [2024-10-24 18:51:16,053 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) [2024-10-24 18:51:16,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:16,054 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] [2024-10-24 18:51:16,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-24 18:51:16,257 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 [2024-10-24 18:51:16,258 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)] === [2024-10-24 18:51:16,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:16,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1119191721, now seen corresponding path program 1 times [2024-10-24 18:51:16,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:16,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133707670] [2024-10-24 18:51:16,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:16,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:17,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:17,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133707670] [2024-10-24 18:51:17,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133707670] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:17,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782032790] [2024-10-24 18:51:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:17,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:17,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:17,176 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) [2024-10-24 18:51:17,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-24 18:51:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:17,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-10-24 18:51:17,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:17,461 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 [2024-10-24 18:51:17,617 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 [2024-10-24 18:51:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-24 18:51:17,736 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 18:51:17,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782032790] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:17,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-24 18:51:17,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 19 [2024-10-24 18:51:17,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656243946] [2024-10-24 18:51:17,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:17,737 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 18:51:17,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:17,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 18:51:17,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2024-10-24 18:51:17,802 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-10-24 18:51:17,802 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) [2024-10-24 18:51:17,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:17,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-10-24 18:51:17,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:21,383 INFO L124 PetriNetUnfolderBase]: 10165/20131 cut-off events. [2024-10-24 18:51:21,384 INFO L125 PetriNetUnfolderBase]: For 33551/33551 co-relation queries the response was YES. [2024-10-24 18:51:21,455 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. [2024-10-24 18:51:21,528 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 148 selfloop transitions, 142 changer transitions 0/300 dead transitions. [2024-10-24 18:51:21,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 300 transitions, 2676 flow [2024-10-24 18:51:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-10-24 18:51:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-10-24 18:51:21,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 416 transitions. [2024-10-24 18:51:21,530 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4531590413943355 [2024-10-24 18:51:21,530 INFO L175 Difference]: Start difference. First operand has 127 places, 124 transitions, 1031 flow. Second operand 17 states and 416 transitions. [2024-10-24 18:51:21,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 300 transitions, 2676 flow [2024-10-24 18:51:21,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 300 transitions, 2519 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-10-24 18:51:21,712 INFO L231 Difference]: Finished difference. Result has 144 places, 191 transitions, 1936 flow [2024-10-24 18:51:21,714 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} [2024-10-24 18:51:21,715 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 95 predicate places. [2024-10-24 18:51:21,715 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 191 transitions, 1936 flow [2024-10-24 18:51:21,715 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) [2024-10-24 18:51:21,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:21,715 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] [2024-10-24 18:51:21,733 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-24 18:51:21,916 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 [2024-10-24 18:51:21,916 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)] === [2024-10-24 18:51:21,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:21,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1831036496, now seen corresponding path program 1 times [2024-10-24 18:51:21,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:21,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954071164] [2024-10-24 18:51:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:21,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:21,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 18:51:22,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:22,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954071164] [2024-10-24 18:51:22,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954071164] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:22,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088583469] [2024-10-24 18:51:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:22,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:22,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:22,457 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) [2024-10-24 18:51:22,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-24 18:51:22,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:22,584 INFO L255 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-24 18:51:22,586 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 18:51:22,961 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:23,303 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 18:51:23,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088583469] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:23,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:23,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-10-24 18:51:23,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013277715] [2024-10-24 18:51:23,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:23,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-10-24 18:51:23,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:23,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-10-24 18:51:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-10-24 18:51:23,486 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:51:23,487 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) [2024-10-24 18:51:23,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:23,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:51:23,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:27,292 INFO L124 PetriNetUnfolderBase]: 10541/20509 cut-off events. [2024-10-24 18:51:27,292 INFO L125 PetriNetUnfolderBase]: For 38910/38920 co-relation queries the response was YES. [2024-10-24 18:51:27,558 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. [2024-10-24 18:51:27,630 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 394 selfloop transitions, 149 changer transitions 0/551 dead transitions. [2024-10-24 18:51:27,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 551 transitions, 5179 flow [2024-10-24 18:51:27,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-10-24 18:51:27,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-10-24 18:51:27,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 684 transitions. [2024-10-24 18:51:27,633 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5066666666666667 [2024-10-24 18:51:27,633 INFO L175 Difference]: Start difference. First operand has 144 places, 191 transitions, 1936 flow. Second operand 25 states and 684 transitions. [2024-10-24 18:51:27,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 551 transitions, 5179 flow [2024-10-24 18:51:27,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 551 transitions, 4750 flow, removed 214 selfloop flow, removed 1 redundant places. [2024-10-24 18:51:27,918 INFO L231 Difference]: Finished difference. Result has 179 places, 268 transitions, 2938 flow [2024-10-24 18:51:27,918 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} [2024-10-24 18:51:27,919 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 130 predicate places. [2024-10-24 18:51:27,919 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 268 transitions, 2938 flow [2024-10-24 18:51:27,919 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) [2024-10-24 18:51:27,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:27,920 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 18:51:27,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-24 18:51:28,120 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 [2024-10-24 18:51:28,121 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)] === [2024-10-24 18:51:28,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:28,121 INFO L85 PathProgramCache]: Analyzing trace with hash 423730696, now seen corresponding path program 1 times [2024-10-24 18:51:28,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:28,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809977558] [2024-10-24 18:51:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:28,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:28,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:28,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:28,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809977558] [2024-10-24 18:51:28,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809977558] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:28,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803634546] [2024-10-24 18:51:28,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:28,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:28,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:28,212 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) [2024-10-24 18:51:28,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-24 18:51:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:28,323 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 18:51:28,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:28,365 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:28,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803634546] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:28,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:28,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-10-24 18:51:28,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329056594] [2024-10-24 18:51:28,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:28,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 18:51:28,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:28,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 18:51:28,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-10-24 18:51:28,426 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:28,429 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) [2024-10-24 18:51:28,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:28,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:28,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:34,237 INFO L124 PetriNetUnfolderBase]: 16525/32600 cut-off events. [2024-10-24 18:51:34,237 INFO L125 PetriNetUnfolderBase]: For 82873/82892 co-relation queries the response was YES. [2024-10-24 18:51:34,531 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. [2024-10-24 18:51:34,657 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 514 selfloop transitions, 146 changer transitions 0/669 dead transitions. [2024-10-24 18:51:34,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 669 transitions, 7981 flow [2024-10-24 18:51:34,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 18:51:34,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 18:51:34,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 293 transitions. [2024-10-24 18:51:34,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6782407407407407 [2024-10-24 18:51:34,660 INFO L175 Difference]: Start difference. First operand has 179 places, 268 transitions, 2938 flow. Second operand 8 states and 293 transitions. [2024-10-24 18:51:34,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 669 transitions, 7981 flow [2024-10-24 18:51:35,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 669 transitions, 7482 flow, removed 201 selfloop flow, removed 9 redundant places. [2024-10-24 18:51:35,322 INFO L231 Difference]: Finished difference. Result has 183 places, 347 transitions, 4335 flow [2024-10-24 18:51:35,322 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} [2024-10-24 18:51:35,323 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 134 predicate places. [2024-10-24 18:51:35,323 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 347 transitions, 4335 flow [2024-10-24 18:51:35,323 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) [2024-10-24 18:51:35,324 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:35,324 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] [2024-10-24 18:51:35,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-24 18:51:35,524 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 [2024-10-24 18:51:35,524 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)] === [2024-10-24 18:51:35,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:35,525 INFO L85 PathProgramCache]: Analyzing trace with hash 2076465584, now seen corresponding path program 1 times [2024-10-24 18:51:35,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:35,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121748556] [2024-10-24 18:51:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:35,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:35,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-10-24 18:51:35,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:35,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121748556] [2024-10-24 18:51:35,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121748556] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 18:51:35,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 18:51:35,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 18:51:35,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982602100] [2024-10-24 18:51:35,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 18:51:35,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 18:51:35,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:35,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 18:51:35,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 18:51:35,591 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:35,591 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) [2024-10-24 18:51:35,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:35,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:35,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:41,161 INFO L124 PetriNetUnfolderBase]: 14877/29147 cut-off events. [2024-10-24 18:51:41,161 INFO L125 PetriNetUnfolderBase]: For 87361/87400 co-relation queries the response was YES. [2024-10-24 18:51:41,371 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. [2024-10-24 18:51:41,452 INFO L140 encePairwiseOnDemand]: 49/54 looper letters, 296 selfloop transitions, 72 changer transitions 0/377 dead transitions. [2024-10-24 18:51:41,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 377 transitions, 5236 flow [2024-10-24 18:51:41,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 18:51:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 18:51:41,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-10-24 18:51:41,453 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-10-24 18:51:41,454 INFO L175 Difference]: Start difference. First operand has 183 places, 347 transitions, 4335 flow. Second operand 3 states and 96 transitions. [2024-10-24 18:51:41,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 377 transitions, 5236 flow [2024-10-24 18:51:41,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 377 transitions, 5156 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-10-24 18:51:41,875 INFO L231 Difference]: Finished difference. Result has 183 places, 329 transitions, 4312 flow [2024-10-24 18:51:41,875 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} [2024-10-24 18:51:41,875 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 134 predicate places. [2024-10-24 18:51:41,876 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 329 transitions, 4312 flow [2024-10-24 18:51:41,876 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) [2024-10-24 18:51:41,876 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:41,876 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] [2024-10-24 18:51:41,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-10-24 18:51:41,876 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)] === [2024-10-24 18:51:41,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:41,876 INFO L85 PathProgramCache]: Analyzing trace with hash -850781396, now seen corresponding path program 1 times [2024-10-24 18:51:41,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:41,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56743487] [2024-10-24 18:51:41,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:41,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:42,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:42,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56743487] [2024-10-24 18:51:42,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56743487] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:42,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008810376] [2024-10-24 18:51:42,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:42,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:42,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:42,951 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) [2024-10-24 18:51:42,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-24 18:51:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:43,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-10-24 18:51:43,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:43,187 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 [2024-10-24 18:51:43,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 18:51:43,339 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 [2024-10-24 18:51:43,493 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 [2024-10-24 18:51:43,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:43,582 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:44,057 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 [2024-10-24 18:51:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:44,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008810376] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:44,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:44,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2024-10-24 18:51:44,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515910050] [2024-10-24 18:51:44,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:44,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-10-24 18:51:44,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:44,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-10-24 18:51:44,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1076, Unknown=0, NotChecked=0, Total=1190 [2024-10-24 18:51:44,675 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-10-24 18:51:44,676 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) [2024-10-24 18:51:44,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:44,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-10-24 18:51:44,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 18:51:54,214 INFO L124 PetriNetUnfolderBase]: 19025/37405 cut-off events. [2024-10-24 18:51:54,214 INFO L125 PetriNetUnfolderBase]: For 118361/118361 co-relation queries the response was YES. [2024-10-24 18:51:54,455 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. [2024-10-24 18:51:54,554 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 371 selfloop transitions, 385 changer transitions 26/791 dead transitions. [2024-10-24 18:51:54,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 791 transitions, 8724 flow [2024-10-24 18:51:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-10-24 18:51:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2024-10-24 18:51:54,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 1212 transitions. [2024-10-24 18:51:54,558 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4156378600823045 [2024-10-24 18:51:54,558 INFO L175 Difference]: Start difference. First operand has 183 places, 329 transitions, 4312 flow. Second operand 54 states and 1212 transitions. [2024-10-24 18:51:54,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 791 transitions, 8724 flow [2024-10-24 18:51:55,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 791 transitions, 8430 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-10-24 18:51:55,149 INFO L231 Difference]: Finished difference. Result has 239 places, 435 transitions, 6271 flow [2024-10-24 18:51:55,149 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} [2024-10-24 18:51:55,149 INFO L277 CegarLoopForPetriNet]: 49 programPoint places, 190 predicate places. [2024-10-24 18:51:55,149 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 435 transitions, 6271 flow [2024-10-24 18:51:55,150 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) [2024-10-24 18:51:55,150 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 18:51:55,150 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] [2024-10-24 18:51:55,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-24 18:51:55,350 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 [2024-10-24 18:51:55,350 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)] === [2024-10-24 18:51:55,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 18:51:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash -917738821, now seen corresponding path program 1 times [2024-10-24 18:51:55,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-24 18:51:55,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992962914] [2024-10-24 18:51:55,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:55,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-24 18:51:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:55,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-24 18:51:55,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992962914] [2024-10-24 18:51:55,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992962914] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-24 18:51:55,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099262892] [2024-10-24 18:51:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 18:51:55,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-24 18:51:55,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 18:51:55,762 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) [2024-10-24 18:51:55,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-24 18:51:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 18:51:56,077 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-10-24 18:51:56,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 18:51:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:56,458 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 18:51:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 18:51:56,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099262892] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 18:51:56,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-24 18:51:56,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-10-24 18:51:56,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906403059] [2024-10-24 18:51:56,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-24 18:51:56,762 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-10-24 18:51:56,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-24 18:51:56,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-10-24 18:51:56,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-10-24 18:51:56,867 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-10-24 18:51:56,868 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) [2024-10-24 18:51:56,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 18:51:56,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-10-24 18:51:56,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand