./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/pthread/twostage_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3289d67d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/pthread/twostage_3.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 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-17 03:06:36,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-17 03:06:36,353 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-17 03:06:36,359 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-17 03:06:36,361 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-17 03:06:36,386 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-17 03:06:36,387 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-17 03:06:36,387 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-17 03:06:36,387 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-17 03:06:36,388 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-17 03:06:36,388 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-17 03:06:36,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-17 03:06:36,389 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-17 03:06:36,391 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-17 03:06:36,392 INFO L153 SettingsManager]: * Use SBE=true [2024-11-17 03:06:36,393 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-17 03:06:36,393 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-17 03:06:36,397 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-17 03:06:36,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-17 03:06:36,398 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-17 03:06:36,398 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-17 03:06:36,398 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-17 03:06:36,399 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-17 03:06:36,399 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-17 03:06:36,399 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-17 03:06:36,399 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-17 03:06:36,399 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-17 03:06:36,400 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-17 03:06:36,400 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-17 03:06:36,400 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-17 03:06:36,400 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-17 03:06:36,400 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-17 03:06:36,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-17 03:06:36,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:06:36,401 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-17 03:06:36,401 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-17 03:06:36,401 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-17 03:06:36,402 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-17 03:06:36,402 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-17 03:06:36,402 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-17 03:06:36,402 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-17 03:06:36,403 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-17 03:06:36,403 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1032ef3fe166161226ca7e81ea27802cfc3f516ad1e4b45c387461fe1ddeccf8 [2024-11-17 03:06:36,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-17 03:06:36,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-17 03:06:36,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-17 03:06:36,696 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-17 03:06:36,697 INFO L274 PluginConnector]: CDTParser initialized [2024-11-17 03:06:36,698 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/twostage_3.i [2024-11-17 03:06:38,143 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-17 03:06:38,444 INFO L384 CDTParser]: Found 1 translation units. [2024-11-17 03:06:38,446 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/twostage_3.i [2024-11-17 03:06:38,463 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92cd9b27/d3ec9d7c56c84790be15af171949d974/FLAG8d292ad8e [2024-11-17 03:06:38,480 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c92cd9b27/d3ec9d7c56c84790be15af171949d974 [2024-11-17 03:06:38,483 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-17 03:06:38,485 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-17 03:06:38,486 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-17 03:06:38,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-17 03:06:38,491 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-17 03:06:38,492 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:06:38" (1/1) ... [2024-11-17 03:06:38,493 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33e1564e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:38, skipping insertion in model container [2024-11-17 03:06:38,493 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:06:38" (1/1) ... [2024-11-17 03:06:38,542 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-17 03:06:39,054 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:06:39,055 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-17 03:06:39,074 WARN L1684 CHandler]: Possible shadowing of function lock [2024-11-17 03:06:39,075 WARN L1684 CHandler]: Possible shadowing of function lock [2024-11-17 03:06:39,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:06:39,087 INFO L200 MainTranslator]: Completed pre-run [2024-11-17 03:06:39,151 WARN L1684 CHandler]: Possible shadowing of function lock [2024-11-17 03:06:39,153 WARN L1684 CHandler]: Possible shadowing of function lock [2024-11-17 03:06:39,154 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-17 03:06:39,224 INFO L204 MainTranslator]: Completed translation [2024-11-17 03:06:39,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39 WrapperNode [2024-11-17 03:06:39,225 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-17 03:06:39,226 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-17 03:06:39,226 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-17 03:06:39,226 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-17 03:06:39,233 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (1/1) ... [2024-11-17 03:06:39,251 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (1/1) ... [2024-11-17 03:06:39,279 INFO L138 Inliner]: procedures = 373, calls = 34, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 171 [2024-11-17 03:06:39,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-17 03:06:39,280 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-17 03:06:39,280 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-17 03:06:39,280 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-17 03:06:39,291 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (1/1) ... [2024-11-17 03:06:39,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (1/1) ... [2024-11-17 03:06:39,295 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (1/1) ... [2024-11-17 03:06:39,313 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 2, 2]. 33 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-17 03:06:39,314 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (1/1) ... [2024-11-17 03:06:39,314 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (1/1) ... [2024-11-17 03:06:39,324 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (1/1) ... [2024-11-17 03:06:39,325 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (1/1) ... [2024-11-17 03:06:39,327 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (1/1) ... [2024-11-17 03:06:39,328 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (1/1) ... [2024-11-17 03:06:39,332 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-17 03:06:39,333 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-17 03:06:39,333 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-17 03:06:39,333 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-17 03:06:39,337 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (1/1) ... [2024-11-17 03:06:39,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-17 03:06:39,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:06:39,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-17 03:06:39,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-17 03:06:39,489 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2024-11-17 03:06:39,493 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2024-11-17 03:06:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2024-11-17 03:06:39,493 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2024-11-17 03:06:39,493 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-17 03:06:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-17 03:06:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-17 03:06:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-17 03:06:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-17 03:06:39,494 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-17 03:06:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-17 03:06:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-17 03:06:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-17 03:06:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-17 03:06:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-17 03:06:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-17 03:06:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-17 03:06:39,495 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-17 03:06:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-17 03:06:39,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-17 03:06:39,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-17 03:06:39,499 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-17 03:06:39,673 INFO L256 CfgBuilder]: Building ICFG [2024-11-17 03:06:39,675 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-17 03:06:40,041 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L1301: havoc main_~#tPool~0#1.base, main_~#tPool~0#1.offset; [2024-11-17 03:06:40,044 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L1301-1: SUMMARY for call ULTIMATE.dealloc(main_~#tPool~0#1.base, main_~#tPool~0#1.offset); srcloc: null [2024-11-17 03:06:40,044 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L1302: havoc main_~#rPool~0#1.base, main_~#rPool~0#1.offset; [2024-11-17 03:06:40,044 INFO L1250 $ProcedureCfgBuilder]: dead code at ProgramPoint L1302-1: SUMMARY for call ULTIMATE.dealloc(main_~#rPool~0#1.base, main_~#rPool~0#1.offset); srcloc: null [2024-11-17 03:06:40,046 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-17 03:06:40,046 INFO L307 CfgBuilder]: Performing block encoding [2024-11-17 03:06:40,179 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-17 03:06:40,179 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-17 03:06:40,180 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:06:40 BoogieIcfgContainer [2024-11-17 03:06:40,180 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-17 03:06:40,182 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-17 03:06:40,182 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-17 03:06:40,188 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-17 03:06:40,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:06:38" (1/3) ... [2024-11-17 03:06:40,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb55175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:06:40, skipping insertion in model container [2024-11-17 03:06:40,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:06:39" (2/3) ... [2024-11-17 03:06:40,188 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb55175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:06:40, skipping insertion in model container [2024-11-17 03:06:40,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.11 03:06:40" (3/3) ... [2024-11-17 03:06:40,190 INFO L112 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2024-11-17 03:06:40,202 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-17 03:06:40,202 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-17 03:06:40,203 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-17 03:06:40,253 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-17 03:06:40,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 91 transitions, 202 flow [2024-11-17 03:06:40,362 INFO L124 PetriNetUnfolderBase]: 30/210 cut-off events. [2024-11-17 03:06:40,363 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-11-17 03:06:40,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227 conditions, 210 events. 30/210 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1008 event pairs, 0 based on Foata normal form. 0/138 useless extension candidates. Maximal degree in co-relation 107. Up to 8 conditions per place. [2024-11-17 03:06:40,370 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 91 transitions, 202 flow [2024-11-17 03:06:40,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 91 transitions, 202 flow [2024-11-17 03:06:40,390 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:06:40,397 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;@5b7a20e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:06:40,398 INFO L334 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2024-11-17 03:06:40,401 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:06:40,401 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-17 03:06:40,401 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:06:40,401 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:06:40,402 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:06:40,403 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-17 03:06:40,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:06:40,411 INFO L85 PathProgramCache]: Analyzing trace with hash 15242732, now seen corresponding path program 1 times [2024-11-17 03:06:40,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:06:40,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237358286] [2024-11-17 03:06:40,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:06:40,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:06:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:06:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:06:40,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:06:40,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237358286] [2024-11-17 03:06:40,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237358286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:06:40,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:06:40,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:06:40,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647033544] [2024-11-17 03:06:40,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:06:40,609 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-17 03:06:40,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:06:40,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-17 03:06:40,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-17 03:06:40,640 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 91 [2024-11-17 03:06:40,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 91 transitions, 202 flow. Second operand has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:40,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:06:40,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 91 [2024-11-17 03:06:40,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:06:41,211 INFO L124 PetriNetUnfolderBase]: 1351/3052 cut-off events. [2024-11-17 03:06:41,212 INFO L125 PetriNetUnfolderBase]: For 191/287 co-relation queries the response was YES. [2024-11-17 03:06:41,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5297 conditions, 3052 events. 1351/3052 cut-off events. For 191/287 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 22792 event pairs, 1241 based on Foata normal form. 595/3350 useless extension candidates. Maximal degree in co-relation 4642. Up to 2160 conditions per place. [2024-11-17 03:06:41,240 INFO L140 encePairwiseOnDemand]: 82/91 looper letters, 39 selfloop transitions, 0 changer transitions 0/81 dead transitions. [2024-11-17 03:06:41,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 81 transitions, 260 flow [2024-11-17 03:06:41,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-17 03:06:41,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-17 03:06:41,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 132 transitions. [2024-11-17 03:06:41,253 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7252747252747253 [2024-11-17 03:06:41,255 INFO L175 Difference]: Start difference. First operand has 83 places, 91 transitions, 202 flow. Second operand 2 states and 132 transitions. [2024-11-17 03:06:41,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 81 transitions, 260 flow [2024-11-17 03:06:41,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 81 transitions, 260 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:06:41,265 INFO L231 Difference]: Finished difference. Result has 81 places, 81 transitions, 182 flow [2024-11-17 03:06:41,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=182, PETRI_PLACES=81, PETRI_TRANSITIONS=81} [2024-11-17 03:06:41,272 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -2 predicate places. [2024-11-17 03:06:41,273 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 81 transitions, 182 flow [2024-11-17 03:06:41,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 43.0) internal successors, (86), 2 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:41,273 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:06:41,274 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:06:41,274 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-17 03:06:41,274 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-17 03:06:41,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:06:41,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1764660167, now seen corresponding path program 1 times [2024-11-17 03:06:41,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:06:41,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130865569] [2024-11-17 03:06:41,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:06:41,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:06:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:06:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:06:41,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:06:41,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130865569] [2024-11-17 03:06:41,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130865569] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:06:41,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:06:41,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-17 03:06:41,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616300946] [2024-11-17 03:06:41,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:06:41,562 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-17 03:06:41,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:06:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-17 03:06:41,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-17 03:06:41,593 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 91 [2024-11-17 03:06:41,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 81 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:41,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:06:41,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 91 [2024-11-17 03:06:41,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:06:42,057 INFO L124 PetriNetUnfolderBase]: 1632/3539 cut-off events. [2024-11-17 03:06:42,057 INFO L125 PetriNetUnfolderBase]: For 184/280 co-relation queries the response was YES. [2024-11-17 03:06:42,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6244 conditions, 3539 events. 1632/3539 cut-off events. For 184/280 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 27161 event pairs, 990 based on Foata normal form. 0/3299 useless extension candidates. Maximal degree in co-relation 6239. Up to 1760 conditions per place. [2024-11-17 03:06:42,078 INFO L140 encePairwiseOnDemand]: 87/91 looper letters, 60 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2024-11-17 03:06:42,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 100 transitions, 344 flow [2024-11-17 03:06:42,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-17 03:06:42,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-17 03:06:42,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2024-11-17 03:06:42,083 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.652014652014652 [2024-11-17 03:06:42,084 INFO L175 Difference]: Start difference. First operand has 81 places, 81 transitions, 182 flow. Second operand 3 states and 178 transitions. [2024-11-17 03:06:42,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 100 transitions, 344 flow [2024-11-17 03:06:42,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 100 transitions, 344 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-17 03:06:42,088 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 182 flow [2024-11-17 03:06:42,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2024-11-17 03:06:42,091 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -2 predicate places. [2024-11-17 03:06:42,091 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 182 flow [2024-11-17 03:06:42,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:42,091 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:06:42,092 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-17 03:06:42,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-17 03:06:42,092 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-17 03:06:42,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:06:42,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1764660168, now seen corresponding path program 1 times [2024-11-17 03:06:42,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:06:42,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168917043] [2024-11-17 03:06:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:06:42,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:06:42,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:06:42,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:06:42,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:06:42,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168917043] [2024-11-17 03:06:42,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168917043] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:06:42,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:06:42,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:06:42,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611051720] [2024-11-17 03:06:42,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:06:42,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-17 03:06:42,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:06:42,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-17 03:06:42,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-17 03:06:42,487 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 91 [2024-11-17 03:06:42,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:42,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:06:42,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 91 [2024-11-17 03:06:42,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:06:43,404 INFO L124 PetriNetUnfolderBase]: 3297/7691 cut-off events. [2024-11-17 03:06:43,405 INFO L125 PetriNetUnfolderBase]: For 776/1043 co-relation queries the response was YES. [2024-11-17 03:06:43,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13434 conditions, 7691 events. 3297/7691 cut-off events. For 776/1043 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 70560 event pairs, 2696 based on Foata normal form. 2/6962 useless extension candidates. Maximal degree in co-relation 13428. Up to 2622 conditions per place. [2024-11-17 03:06:43,453 INFO L140 encePairwiseOnDemand]: 83/91 looper letters, 99 selfloop transitions, 6 changer transitions 0/143 dead transitions. [2024-11-17 03:06:43,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 143 transitions, 547 flow [2024-11-17 03:06:43,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:06:43,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:06:43,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 267 transitions. [2024-11-17 03:06:43,458 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7335164835164835 [2024-11-17 03:06:43,458 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 182 flow. Second operand 4 states and 267 transitions. [2024-11-17 03:06:43,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 143 transitions, 547 flow [2024-11-17 03:06:43,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 143 transitions, 537 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:06:43,470 INFO L231 Difference]: Finished difference. Result has 84 places, 83 transitions, 220 flow [2024-11-17 03:06:43,470 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=84, PETRI_TRANSITIONS=83} [2024-11-17 03:06:43,471 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 1 predicate places. [2024-11-17 03:06:43,471 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 83 transitions, 220 flow [2024-11-17 03:06:43,472 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:43,472 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:06:43,472 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:06:43,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-17 03:06:43,472 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-17 03:06:43,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:06:43,473 INFO L85 PathProgramCache]: Analyzing trace with hash 590642511, now seen corresponding path program 1 times [2024-11-17 03:06:43,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:06:43,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846741478] [2024-11-17 03:06:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:06:43,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:06:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:06:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:06:43,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:06:43,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846741478] [2024-11-17 03:06:43,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846741478] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:06:43,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:06:43,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:06:43,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218009861] [2024-11-17 03:06:43,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:06:43,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:06:43,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:06:43,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:06:43,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:06:43,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 91 [2024-11-17 03:06:43,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 83 transitions, 220 flow. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:43,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:06:43,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 91 [2024-11-17 03:06:43,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:06:44,353 INFO L124 PetriNetUnfolderBase]: 3266/7199 cut-off events. [2024-11-17 03:06:44,354 INFO L125 PetriNetUnfolderBase]: For 706/716 co-relation queries the response was YES. [2024-11-17 03:06:44,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13117 conditions, 7199 events. 3266/7199 cut-off events. For 706/716 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 59762 event pairs, 2493 based on Foata normal form. 143/7038 useless extension candidates. Maximal degree in co-relation 13109. Up to 3417 conditions per place. [2024-11-17 03:06:44,400 INFO L140 encePairwiseOnDemand]: 78/91 looper letters, 102 selfloop transitions, 11 changer transitions 1/149 dead transitions. [2024-11-17 03:06:44,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 149 transitions, 602 flow [2024-11-17 03:06:44,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:06:44,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:06:44,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 264 transitions. [2024-11-17 03:06:44,402 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7252747252747253 [2024-11-17 03:06:44,402 INFO L175 Difference]: Start difference. First operand has 84 places, 83 transitions, 220 flow. Second operand 4 states and 264 transitions. [2024-11-17 03:06:44,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 149 transitions, 602 flow [2024-11-17 03:06:44,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 149 transitions, 588 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-17 03:06:44,410 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 274 flow [2024-11-17 03:06:44,411 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=274, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2024-11-17 03:06:44,412 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 5 predicate places. [2024-11-17 03:06:44,413 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 274 flow [2024-11-17 03:06:44,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:44,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:06:44,413 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:06:44,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-17 03:06:44,414 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-17 03:06:44,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:06:44,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1066593866, now seen corresponding path program 1 times [2024-11-17 03:06:44,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:06:44,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184081145] [2024-11-17 03:06:44,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:06:44,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:06:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:06:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:06:44,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:06:44,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184081145] [2024-11-17 03:06:44,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184081145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:06:44,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:06:44,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-17 03:06:44,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57721580] [2024-11-17 03:06:44,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:06:44,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-17 03:06:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:06:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-17 03:06:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-17 03:06:44,691 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 91 [2024-11-17 03:06:44,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 274 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:44,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:06:44,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 91 [2024-11-17 03:06:44,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:06:45,811 INFO L124 PetriNetUnfolderBase]: 3837/9433 cut-off events. [2024-11-17 03:06:45,812 INFO L125 PetriNetUnfolderBase]: For 1054/1073 co-relation queries the response was YES. [2024-11-17 03:06:45,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16903 conditions, 9433 events. 3837/9433 cut-off events. For 1054/1073 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 87690 event pairs, 1585 based on Foata normal form. 1/8371 useless extension candidates. Maximal degree in co-relation 16893. Up to 6039 conditions per place. [2024-11-17 03:06:45,851 INFO L140 encePairwiseOnDemand]: 83/91 looper letters, 70 selfloop transitions, 7 changer transitions 2/117 dead transitions. [2024-11-17 03:06:45,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 117 transitions, 495 flow [2024-11-17 03:06:45,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-17 03:06:45,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-17 03:06:45,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 223 transitions. [2024-11-17 03:06:45,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6126373626373627 [2024-11-17 03:06:45,853 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 274 flow. Second operand 4 states and 223 transitions. [2024-11-17 03:06:45,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 117 transitions, 495 flow [2024-11-17 03:06:45,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 117 transitions, 489 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-17 03:06:45,862 INFO L231 Difference]: Finished difference. Result has 91 places, 91 transitions, 310 flow [2024-11-17 03:06:45,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=310, PETRI_PLACES=91, PETRI_TRANSITIONS=91} [2024-11-17 03:06:45,865 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 8 predicate places. [2024-11-17 03:06:45,867 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 91 transitions, 310 flow [2024-11-17 03:06:45,868 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:45,868 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:06:45,868 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:06:45,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-17 03:06:45,868 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-17 03:06:45,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:06:45,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1795634728, now seen corresponding path program 1 times [2024-11-17 03:06:45,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:06:45,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34294775] [2024-11-17 03:06:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:06:45,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:06:45,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:06:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:06:46,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:06:46,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34294775] [2024-11-17 03:06:46,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34294775] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-17 03:06:46,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001210450] [2024-11-17 03:06:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:06:46,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-17 03:06:46,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-17 03:06:46,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-17 03:06:46,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-17 03:06:46,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:06:46,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-17 03:06:46,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-17 03:06:46,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:06:46,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2024-11-17 03:06:46,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-11-17 03:06:46,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:06:46,446 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 03:06:46,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:06:46,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:06:46,455 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 03:06:46,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:06:46,469 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 03:06:46,474 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 03:06:46,482 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 03:06:46,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:06:46,495 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 03:06:46,505 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 03:06:46,510 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 03:06:46,523 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 03:06:46,528 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 03:06:46,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-17 03:06:46,534 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 03:06:46,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:06:46,621 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-17 03:06:46,704 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-17 03:06:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:06:46,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001210450] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-17 03:06:46,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-17 03:06:46,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-17 03:06:46,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406016227] [2024-11-17 03:06:46,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-17 03:06:46,723 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-17 03:06:46,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:06:46,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-17 03:06:46,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-11-17 03:06:46,939 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 91 [2024-11-17 03:06:46,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 91 transitions, 310 flow. Second operand has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:46,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:06:46,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 91 [2024-11-17 03:06:46,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-17 03:06:47,686 INFO L124 PetriNetUnfolderBase]: 2758/5984 cut-off events. [2024-11-17 03:06:47,687 INFO L125 PetriNetUnfolderBase]: For 1704/1714 co-relation queries the response was YES. [2024-11-17 03:06:47,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11988 conditions, 5984 events. 2758/5984 cut-off events. For 1704/1714 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 49030 event pairs, 1903 based on Foata normal form. 24/5605 useless extension candidates. Maximal degree in co-relation 11976. Up to 3803 conditions per place. [2024-11-17 03:06:47,732 INFO L140 encePairwiseOnDemand]: 82/91 looper letters, 93 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2024-11-17 03:06:47,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 575 flow [2024-11-17 03:06:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-17 03:06:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-17 03:06:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 298 transitions. [2024-11-17 03:06:47,734 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5457875457875457 [2024-11-17 03:06:47,734 INFO L175 Difference]: Start difference. First operand has 91 places, 91 transitions, 310 flow. Second operand 6 states and 298 transitions. [2024-11-17 03:06:47,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 575 flow [2024-11-17 03:06:47,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 132 transitions, 539 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-17 03:06:47,743 INFO L231 Difference]: Finished difference. Result has 94 places, 85 transitions, 264 flow [2024-11-17 03:06:47,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=91, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=264, PETRI_PLACES=94, PETRI_TRANSITIONS=85} [2024-11-17 03:06:47,744 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 11 predicate places. [2024-11-17 03:06:47,744 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 85 transitions, 264 flow [2024-11-17 03:06:47,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 35.0) internal successors, (420), 12 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:47,745 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:06:47,745 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-17 03:06:47,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-17 03:06:47,945 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 [2024-11-17 03:06:47,946 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2024-11-17 03:06:47,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:06:47,947 INFO L85 PathProgramCache]: Analyzing trace with hash -169897826, now seen corresponding path program 1 times [2024-11-17 03:06:47,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:06:47,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587830044] [2024-11-17 03:06:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:06:47,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:06:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:06:47,979 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-17 03:06:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-17 03:06:48,017 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-17 03:06:48,017 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-17 03:06:48,019 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (14 of 15 remaining) [2024-11-17 03:06:48,020 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX (13 of 15 remaining) [2024-11-17 03:06:48,021 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX (12 of 15 remaining) [2024-11-17 03:06:48,021 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2024-11-17 03:06:48,021 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2024-11-17 03:06:48,021 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2024-11-17 03:06:48,021 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2024-11-17 03:06:48,021 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2024-11-17 03:06:48,022 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2024-11-17 03:06:48,022 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2024-11-17 03:06:48,022 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2024-11-17 03:06:48,023 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 15 remaining) [2024-11-17 03:06:48,023 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 15 remaining) [2024-11-17 03:06:48,023 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 15 remaining) [2024-11-17 03:06:48,023 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2024-11-17 03:06:48,023 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-17 03:06:48,024 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2024-11-17 03:06:48,026 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-17 03:06:48,026 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-17 03:06:48,060 INFO L143 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2024-11-17 03:06:48,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 132 transitions, 308 flow [2024-11-17 03:06:48,153 INFO L124 PetriNetUnfolderBase]: 121/666 cut-off events. [2024-11-17 03:06:48,154 INFO L125 PetriNetUnfolderBase]: For 72/79 co-relation queries the response was YES. [2024-11-17 03:06:48,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 666 events. 121/666 cut-off events. For 72/79 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 4107 event pairs, 1 based on Foata normal form. 0/444 useless extension candidates. Maximal degree in co-relation 405. Up to 32 conditions per place. [2024-11-17 03:06:48,158 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 132 transitions, 308 flow [2024-11-17 03:06:48,161 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 132 transitions, 308 flow [2024-11-17 03:06:48,163 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-17 03:06:48,165 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;@5b7a20e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-17 03:06:48,166 INFO L334 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2024-11-17 03:06:48,169 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-17 03:06:48,170 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-17 03:06:48,170 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-17 03:06:48,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-17 03:06:48,170 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-17 03:06:48,170 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr10ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr9ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2024-11-17 03:06:48,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-17 03:06:48,171 INFO L85 PathProgramCache]: Analyzing trace with hash 19244652, now seen corresponding path program 1 times [2024-11-17 03:06:48,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-17 03:06:48,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736879236] [2024-11-17 03:06:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-17 03:06:48,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-17 03:06:48,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-17 03:06:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-17 03:06:48,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-17 03:06:48,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736879236] [2024-11-17 03:06:48,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736879236] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-17 03:06:48,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-17 03:06:48,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-17 03:06:48,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346314945] [2024-11-17 03:06:48,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-17 03:06:48,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-17 03:06:48,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-17 03:06:48,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-17 03:06:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-17 03:06:48,189 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 132 [2024-11-17 03:06:48,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 132 transitions, 308 flow. Second operand has 2 states, 2 states have (on average 54.0) internal successors, (108), 2 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-17 03:06:48,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-17 03:06:48,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 132 [2024-11-17 03:06:48,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand