./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-lamport.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/parallel-lamport.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7641d1105b9de7b20c96680ae1baa82cbf27158c037dacb66ff49f347bd2fa94 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:48:57,324 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:48:57,382 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:48:57,387 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:48:57,388 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:48:57,412 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:48:57,412 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:48:57,413 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:48:57,413 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:48:57,414 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:48:57,415 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:48:57,415 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:48:57,416 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:48:57,417 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:48:57,417 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:48:57,418 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:48:57,418 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:48:57,418 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:48:57,418 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:48:57,418 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:48:57,418 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:48:57,419 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:48:57,419 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:48:57,421 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:48:57,422 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:48:57,422 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:48:57,422 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:48:57,422 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:48:57,422 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:48:57,422 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:48:57,423 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:48:57,423 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:48:57,423 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:48:57,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:48:57,423 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:48:57,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:48:57,424 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:48:57,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:48:57,424 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:48:57,424 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:48:57,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:48:57,425 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:48:57,425 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7641d1105b9de7b20c96680ae1baa82cbf27158c037dacb66ff49f347bd2fa94 [2024-11-09 10:48:57,614 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:48:57,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:48:57,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:48:57,635 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:48:57,635 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:48:57,636 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2024-11-09 10:48:58,837 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:48:58,996 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:48:58,997 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-lamport.wvr.c [2024-11-09 10:48:59,004 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e97b53496/7df45a934df44a6cbc9c91aeb5158cea/FLAG6c5ebb6a4 [2024-11-09 10:48:59,404 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e97b53496/7df45a934df44a6cbc9c91aeb5158cea [2024-11-09 10:48:59,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:48:59,408 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:48:59,409 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:48:59,409 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:48:59,413 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:48:59,414 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,415 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34594abd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59, skipping insertion in model container [2024-11-09 10:48:59,415 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,438 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:48:59,603 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:48:59,608 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:48:59,617 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:48:59,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:48:59,656 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:48:59,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59 WrapperNode [2024-11-09 10:48:59,657 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:48:59,658 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:48:59,658 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:48:59,658 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:48:59,663 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,671 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,691 INFO L138 Inliner]: procedures = 22, calls = 30, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 209 [2024-11-09 10:48:59,691 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:48:59,692 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:48:59,692 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:48:59,692 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:48:59,705 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,708 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,727 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-09 10:48:59,727 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,727 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,732 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,736 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,740 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,741 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,744 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:48:59,745 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:48:59,745 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:48:59,745 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:48:59,746 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (1/1) ... [2024-11-09 10:48:59,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:48:59,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:48:59,776 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:48:59,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:48:59,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:48:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:48:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:48:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:48:59,817 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:48:59,817 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:48:59,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:48:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:48:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:48:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:48:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:48:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:48:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:48:59,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:48:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:48:59,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:48:59,837 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:48:59,975 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:48:59,977 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:49:00,278 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:49:00,279 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:49:00,430 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:49:00,430 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-09 10:49:00,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:49:00 BoogieIcfgContainer [2024-11-09 10:49:00,431 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:49:00,433 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:49:00,433 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:49:00,436 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:49:00,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:48:59" (1/3) ... [2024-11-09 10:49:00,437 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a35ec61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:49:00, skipping insertion in model container [2024-11-09 10:49:00,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:48:59" (2/3) ... [2024-11-09 10:49:00,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a35ec61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:49:00, skipping insertion in model container [2024-11-09 10:49:00,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:49:00" (3/3) ... [2024-11-09 10:49:00,439 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-lamport.wvr.c [2024-11-09 10:49:00,454 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:49:00,454 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-09 10:49:00,454 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:49:00,512 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:49:00,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 75 transitions, 171 flow [2024-11-09 10:49:00,564 INFO L124 PetriNetUnfolderBase]: 1/72 cut-off events. [2024-11-09 10:49:00,564 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:49:00,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 1/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 120 event pairs, 0 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2024-11-09 10:49:00,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 75 transitions, 171 flow [2024-11-09 10:49:00,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 71 transitions, 160 flow [2024-11-09 10:49:00,575 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:49:00,581 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;@55ad2972, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:49:00,581 INFO L334 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2024-11-09 10:49:00,585 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:49:00,585 INFO L124 PetriNetUnfolderBase]: 1/14 cut-off events. [2024-11-09 10:49:00,585 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:49:00,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:00,586 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:00,586 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:00,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash 89795604, now seen corresponding path program 1 times [2024-11-09 10:49:00,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:00,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000786175] [2024-11-09 10:49:00,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:00,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:00,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:00,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:00,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000786175] [2024-11-09 10:49:00,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000786175] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:00,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:49:00,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:49:00,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903195910] [2024-11-09 10:49:00,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:00,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:49:00,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:00,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:49:00,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:49:00,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 75 [2024-11-09 10:49:00,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:00,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:00,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 75 [2024-11-09 10:49:00,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:01,122 INFO L124 PetriNetUnfolderBase]: 235/602 cut-off events. [2024-11-09 10:49:01,122 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-09 10:49:01,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1062 conditions, 602 events. 235/602 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3723 event pairs, 234 based on Foata normal form. 1/452 useless extension candidates. Maximal degree in co-relation 934. Up to 395 conditions per place. [2024-11-09 10:49:01,133 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 26 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2024-11-09 10:49:01,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 68 transitions, 210 flow [2024-11-09 10:49:01,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:49:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:49:01,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2024-11-09 10:49:01,144 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.72 [2024-11-09 10:49:01,146 INFO L175 Difference]: Start difference. First operand has 80 places, 71 transitions, 160 flow. Second operand 3 states and 162 transitions. [2024-11-09 10:49:01,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 68 transitions, 210 flow [2024-11-09 10:49:01,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 198 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:49:01,160 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 146 flow [2024-11-09 10:49:01,162 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-09 10:49:01,165 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -7 predicate places. [2024-11-09 10:49:01,165 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 146 flow [2024-11-09 10:49:01,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:01,166 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:01,166 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:01,167 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:49:01,167 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:01,167 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:01,168 INFO L85 PathProgramCache]: Analyzing trace with hash 89795605, now seen corresponding path program 1 times [2024-11-09 10:49:01,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:01,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585485060] [2024-11-09 10:49:01,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:01,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:01,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:01,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:01,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585485060] [2024-11-09 10:49:01,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585485060] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:01,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:49:01,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:49:01,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900800162] [2024-11-09 10:49:01,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:01,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:49:01,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:01,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:49:01,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:49:01,553 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 75 [2024-11-09 10:49:01,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 146 flow. Second operand has 6 states, 6 states have (on average 44.5) internal successors, (267), 6 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:01,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:01,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 75 [2024-11-09 10:49:01,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:01,786 INFO L124 PetriNetUnfolderBase]: 236/605 cut-off events. [2024-11-09 10:49:01,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:49:01,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1034 conditions, 605 events. 236/605 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3776 event pairs, 234 based on Foata normal form. 0/454 useless extension candidates. Maximal degree in co-relation 996. Up to 398 conditions per place. [2024-11-09 10:49:01,792 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 27 selfloop transitions, 6 changer transitions 0/71 dead transitions. [2024-11-09 10:49:01,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 71 transitions, 220 flow [2024-11-09 10:49:01,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:49:01,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:49:01,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 292 transitions. [2024-11-09 10:49:01,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6488888888888888 [2024-11-09 10:49:01,798 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 146 flow. Second operand 6 states and 292 transitions. [2024-11-09 10:49:01,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 71 transitions, 220 flow [2024-11-09 10:49:01,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 71 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:49:01,801 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 173 flow [2024-11-09 10:49:01,801 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=173, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2024-11-09 10:49:01,802 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -2 predicate places. [2024-11-09 10:49:01,802 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 173 flow [2024-11-09 10:49:01,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.5) internal successors, (267), 6 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:01,803 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:01,803 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:01,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:49:01,804 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:01,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:01,805 INFO L85 PathProgramCache]: Analyzing trace with hash 394249312, now seen corresponding path program 1 times [2024-11-09 10:49:01,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:01,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887323971] [2024-11-09 10:49:01,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:01,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:02,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:02,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887323971] [2024-11-09 10:49:02,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887323971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:02,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101737547] [2024-11-09 10:49:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:02,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:02,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:02,178 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:02,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:49:02,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:02,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 10:49:02,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:02,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:49:02,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:02,439 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:02,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101737547] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:49:02,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:49:02,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-09 10:49:02,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962478369] [2024-11-09 10:49:02,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:49:02,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:49:02,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:02,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:49:02,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:49:02,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 75 [2024-11-09 10:49:02,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 173 flow. Second operand has 15 states, 15 states have (on average 44.53333333333333) internal successors, (668), 15 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:02,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:02,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 75 [2024-11-09 10:49:02,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:03,218 INFO L124 PetriNetUnfolderBase]: 236/604 cut-off events. [2024-11-09 10:49:03,219 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:49:03,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043 conditions, 604 events. 236/604 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3742 event pairs, 234 based on Foata normal form. 0/453 useless extension candidates. Maximal degree in co-relation 1021. Up to 394 conditions per place. [2024-11-09 10:49:03,224 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 23 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-11-09 10:49:03,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 70 transitions, 233 flow [2024-11-09 10:49:03,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:49:03,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:49:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 377 transitions. [2024-11-09 10:49:03,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6283333333333333 [2024-11-09 10:49:03,229 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 173 flow. Second operand 8 states and 377 transitions. [2024-11-09 10:49:03,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 70 transitions, 233 flow [2024-11-09 10:49:03,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 70 transitions, 226 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:49:03,231 INFO L231 Difference]: Finished difference. Result has 81 places, 70 transitions, 180 flow [2024-11-09 10:49:03,231 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=180, PETRI_PLACES=81, PETRI_TRANSITIONS=70} [2024-11-09 10:49:03,231 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 1 predicate places. [2024-11-09 10:49:03,232 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 70 transitions, 180 flow [2024-11-09 10:49:03,233 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 44.53333333333333) internal successors, (668), 15 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:03,233 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:03,233 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] [2024-11-09 10:49:03,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:49:03,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:03,438 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:03,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:03,439 INFO L85 PathProgramCache]: Analyzing trace with hash -293277291, now seen corresponding path program 1 times [2024-11-09 10:49:03,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:03,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147262812] [2024-11-09 10:49:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:03,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:03,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147262812] [2024-11-09 10:49:03,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147262812] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:03,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:49:03,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:49:03,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814711091] [2024-11-09 10:49:03,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:03,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:49:03,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:03,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:49:03,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:49:03,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 75 [2024-11-09 10:49:03,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 70 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:03,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:03,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 75 [2024-11-09 10:49:03,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:03,669 INFO L124 PetriNetUnfolderBase]: 610/1171 cut-off events. [2024-11-09 10:49:03,669 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-09 10:49:03,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 1171 events. 610/1171 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7254 event pairs, 608 based on Foata normal form. 0/1103 useless extension candidates. Maximal degree in co-relation 2161. Up to 953 conditions per place. [2024-11-09 10:49:03,675 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 32 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2024-11-09 10:49:03,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 66 transitions, 242 flow [2024-11-09 10:49:03,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:49:03,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:49:03,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-11-09 10:49:03,676 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-09 10:49:03,676 INFO L175 Difference]: Start difference. First operand has 81 places, 70 transitions, 180 flow. Second operand 4 states and 180 transitions. [2024-11-09 10:49:03,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 66 transitions, 242 flow [2024-11-09 10:49:03,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 208 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-11-09 10:49:03,678 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 144 flow [2024-11-09 10:49:03,678 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-11-09 10:49:03,678 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -9 predicate places. [2024-11-09 10:49:03,679 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 144 flow [2024-11-09 10:49:03,679 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:03,679 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:03,679 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] [2024-11-09 10:49:03,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:49:03,679 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:03,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:03,680 INFO L85 PathProgramCache]: Analyzing trace with hash -293277290, now seen corresponding path program 1 times [2024-11-09 10:49:03,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:03,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163098871] [2024-11-09 10:49:03,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:03,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:03,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:03,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163098871] [2024-11-09 10:49:03,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163098871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:03,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:49:03,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:49:03,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930760744] [2024-11-09 10:49:03,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:03,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:49:03,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:03,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:49:03,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:49:03,731 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 75 [2024-11-09 10:49:03,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:03,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:03,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 75 [2024-11-09 10:49:03,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:03,804 INFO L124 PetriNetUnfolderBase]: 235/566 cut-off events. [2024-11-09 10:49:03,804 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:49:03,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 992 conditions, 566 events. 235/566 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3368 event pairs, 234 based on Foata normal form. 1/454 useless extension candidates. Maximal degree in co-relation 959. Up to 399 conditions per place. [2024-11-09 10:49:03,807 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 29 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-11-09 10:49:03,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 202 flow [2024-11-09 10:49:03,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:49:03,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:49:03,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 164 transitions. [2024-11-09 10:49:03,815 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7288888888888889 [2024-11-09 10:49:03,815 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 144 flow. Second operand 3 states and 164 transitions. [2024-11-09 10:49:03,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 202 flow [2024-11-09 10:49:03,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 65 transitions, 199 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:49:03,816 INFO L231 Difference]: Finished difference. Result has 71 places, 65 transitions, 141 flow [2024-11-09 10:49:03,816 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=141, PETRI_PLACES=71, PETRI_TRANSITIONS=65} [2024-11-09 10:49:03,817 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -9 predicate places. [2024-11-09 10:49:03,817 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 65 transitions, 141 flow [2024-11-09 10:49:03,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:03,817 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:03,817 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:03,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:49:03,818 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:03,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:03,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1048300651, now seen corresponding path program 1 times [2024-11-09 10:49:03,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:03,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612079636] [2024-11-09 10:49:03,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:03,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:04,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:04,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612079636] [2024-11-09 10:49:04,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612079636] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:04,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84480834] [2024-11-09 10:49:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:04,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:04,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:04,028 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:04,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:49:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:04,093 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:49:04,095 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:04,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:49:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:04,212 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:04,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84480834] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:04,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:04,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-09 10:49:04,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364053179] [2024-11-09 10:49:04,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:04,213 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:49:04,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:04,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:49:04,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:49:04,267 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 75 [2024-11-09 10:49:04,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 65 transitions, 141 flow. Second operand has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:04,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:04,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 75 [2024-11-09 10:49:04,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:04,378 INFO L124 PetriNetUnfolderBase]: 451/850 cut-off events. [2024-11-09 10:49:04,379 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-09 10:49:04,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1605 conditions, 850 events. 451/850 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4954 event pairs, 90 based on Foata normal form. 37/829 useless extension candidates. Maximal degree in co-relation 1577. Up to 555 conditions per place. [2024-11-09 10:49:04,383 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 41 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2024-11-09 10:49:04,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 73 transitions, 247 flow [2024-11-09 10:49:04,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:49:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:49:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 199 transitions. [2024-11-09 10:49:04,384 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6633333333333333 [2024-11-09 10:49:04,384 INFO L175 Difference]: Start difference. First operand has 71 places, 65 transitions, 141 flow. Second operand 4 states and 199 transitions. [2024-11-09 10:49:04,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 73 transitions, 247 flow [2024-11-09 10:49:04,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 73 transitions, 243 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:49:04,386 INFO L231 Difference]: Finished difference. Result has 71 places, 64 transitions, 141 flow [2024-11-09 10:49:04,386 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=71, PETRI_TRANSITIONS=64} [2024-11-09 10:49:04,389 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -9 predicate places. [2024-11-09 10:49:04,389 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 64 transitions, 141 flow [2024-11-09 10:49:04,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.6) internal successors, (213), 5 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:04,389 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:04,389 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] [2024-11-09 10:49:04,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:49:04,590 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-09 10:49:04,591 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:04,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:04,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2014358320, now seen corresponding path program 1 times [2024-11-09 10:49:04,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:04,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234662745] [2024-11-09 10:49:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:04,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:04,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:04,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234662745] [2024-11-09 10:49:04,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234662745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:04,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424336116] [2024-11-09 10:49:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:04,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:04,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:04,785 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:04,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:49:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:04,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:49:04,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:04,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:49:04,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:04,974 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:04,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424336116] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:04,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:04,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-09 10:49:04,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890107437] [2024-11-09 10:49:04,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:04,975 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:49:04,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:04,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:49:04,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:49:05,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2024-11-09 10:49:05,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 141 flow. Second operand has 6 states, 6 states have (on average 40.833333333333336) internal successors, (245), 6 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:05,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:05,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2024-11-09 10:49:05,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:05,242 INFO L124 PetriNetUnfolderBase]: 663/1268 cut-off events. [2024-11-09 10:49:05,242 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-09 10:49:05,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2413 conditions, 1268 events. 663/1268 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7633 event pairs, 182 based on Foata normal form. 42/1274 useless extension candidates. Maximal degree in co-relation 2377. Up to 498 conditions per place. [2024-11-09 10:49:05,248 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 66 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2024-11-09 10:49:05,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 363 flow [2024-11-09 10:49:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:49:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:49:05,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 300 transitions. [2024-11-09 10:49:05,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-09 10:49:05,250 INFO L175 Difference]: Start difference. First operand has 71 places, 64 transitions, 141 flow. Second operand 6 states and 300 transitions. [2024-11-09 10:49:05,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 363 flow [2024-11-09 10:49:05,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 99 transitions, 357 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:49:05,252 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 173 flow [2024-11-09 10:49:05,253 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=173, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2024-11-09 10:49:05,253 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, -4 predicate places. [2024-11-09 10:49:05,253 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 173 flow [2024-11-09 10:49:05,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.833333333333336) internal successors, (245), 6 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:05,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:05,254 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:05,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:49:05,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:05,454 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:05,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:05,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1218033887, now seen corresponding path program 1 times [2024-11-09 10:49:05,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:05,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718691758] [2024-11-09 10:49:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:05,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:05,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:05,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:05,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:05,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718691758] [2024-11-09 10:49:05,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718691758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:05,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208188547] [2024-11-09 10:49:05,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:05,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:05,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:05,637 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:05,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:49:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:05,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:49:05,716 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:05,876 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:05,877 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:05,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-09 10:49:06,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:06,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208188547] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:49:06,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:49:06,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-09 10:49:06,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534229141] [2024-11-09 10:49:06,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:49:06,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:49:06,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:06,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:49:06,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:49:06,473 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2024-11-09 10:49:06,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 173 flow. Second operand has 17 states, 17 states have (on average 39.88235294117647) internal successors, (678), 17 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:06,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:06,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2024-11-09 10:49:06,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:06,976 INFO L124 PetriNetUnfolderBase]: 1787/3044 cut-off events. [2024-11-09 10:49:06,976 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2024-11-09 10:49:06,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5998 conditions, 3044 events. 1787/3044 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 21455 event pairs, 856 based on Foata normal form. 0/2804 useless extension candidates. Maximal degree in co-relation 3161. Up to 1154 conditions per place. [2024-11-09 10:49:07,013 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 73 selfloop transitions, 17 changer transitions 0/121 dead transitions. [2024-11-09 10:49:07,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 475 flow [2024-11-09 10:49:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-09 10:49:07,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-09 10:49:07,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 498 transitions. [2024-11-09 10:49:07,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6036363636363636 [2024-11-09 10:49:07,015 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 173 flow. Second operand 11 states and 498 transitions. [2024-11-09 10:49:07,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 475 flow [2024-11-09 10:49:07,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 470 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:49:07,019 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 252 flow [2024-11-09 10:49:07,020 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=252, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2024-11-09 10:49:07,020 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 8 predicate places. [2024-11-09 10:49:07,021 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 252 flow [2024-11-09 10:49:07,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 39.88235294117647) internal successors, (678), 17 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:07,021 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:07,021 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:07,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 10:49:07,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:07,222 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:07,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:07,222 INFO L85 PathProgramCache]: Analyzing trace with hash 883694195, now seen corresponding path program 1 times [2024-11-09 10:49:07,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:07,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813588032] [2024-11-09 10:49:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:07,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:07,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:07,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813588032] [2024-11-09 10:49:07,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813588032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:07,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361325764] [2024-11-09 10:49:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:07,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:07,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:07,396 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:07,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:49:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:07,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:49:07,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:07,582 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:07,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361325764] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:07,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:07,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2024-11-09 10:49:07,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245248705] [2024-11-09 10:49:07,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:07,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:49:07,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:07,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:49:07,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:49:07,669 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 75 [2024-11-09 10:49:07,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 76 transitions, 252 flow. Second operand has 6 states, 6 states have (on average 41.166666666666664) internal successors, (247), 6 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:07,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:07,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 75 [2024-11-09 10:49:07,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:08,031 INFO L124 PetriNetUnfolderBase]: 1691/3253 cut-off events. [2024-11-09 10:49:08,031 INFO L125 PetriNetUnfolderBase]: For 954/1254 co-relation queries the response was YES. [2024-11-09 10:49:08,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7032 conditions, 3253 events. 1691/3253 cut-off events. For 954/1254 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24432 event pairs, 490 based on Foata normal form. 251/3440 useless extension candidates. Maximal degree in co-relation 4916. Up to 1436 conditions per place. [2024-11-09 10:49:08,050 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 70 selfloop transitions, 8 changer transitions 0/110 dead transitions. [2024-11-09 10:49:08,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 507 flow [2024-11-09 10:49:08,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:49:08,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:49:08,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 298 transitions. [2024-11-09 10:49:08,052 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6622222222222223 [2024-11-09 10:49:08,052 INFO L175 Difference]: Start difference. First operand has 88 places, 76 transitions, 252 flow. Second operand 6 states and 298 transitions. [2024-11-09 10:49:08,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 507 flow [2024-11-09 10:49:08,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 110 transitions, 501 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:49:08,057 INFO L231 Difference]: Finished difference. Result has 93 places, 78 transitions, 287 flow [2024-11-09 10:49:08,057 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=287, PETRI_PLACES=93, PETRI_TRANSITIONS=78} [2024-11-09 10:49:08,058 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 13 predicate places. [2024-11-09 10:49:08,058 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 78 transitions, 287 flow [2024-11-09 10:49:08,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.166666666666664) internal successors, (247), 6 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:08,058 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:08,058 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:08,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:49:08,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:08,263 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:08,263 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:08,263 INFO L85 PathProgramCache]: Analyzing trace with hash -296527062, now seen corresponding path program 2 times [2024-11-09 10:49:08,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:08,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611265884] [2024-11-09 10:49:08,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:08,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:08,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:49:08,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:08,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611265884] [2024-11-09 10:49:08,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611265884] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:08,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832884490] [2024-11-09 10:49:08,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:49:08,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:08,439 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:08,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:49:08,518 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:49:08,518 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:08,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 10:49:08,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:08,540 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-09 10:49:08,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:08,748 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:08,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832884490] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:08,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:08,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 11 [2024-11-09 10:49:08,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90505149] [2024-11-09 10:49:08,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:08,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:49:08,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:08,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:49:08,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:49:08,850 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 75 [2024-11-09 10:49:08,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 78 transitions, 287 flow. Second operand has 8 states, 8 states have (on average 39.625) internal successors, (317), 8 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:08,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:08,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 75 [2024-11-09 10:49:08,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:09,171 INFO L124 PetriNetUnfolderBase]: 2211/3783 cut-off events. [2024-11-09 10:49:09,171 INFO L125 PetriNetUnfolderBase]: For 1111/1111 co-relation queries the response was YES. [2024-11-09 10:49:09,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8717 conditions, 3783 events. 2211/3783 cut-off events. For 1111/1111 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 28290 event pairs, 1284 based on Foata normal form. 81/3614 useless extension candidates. Maximal degree in co-relation 5201. Up to 2088 conditions per place. [2024-11-09 10:49:09,191 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 42 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-11-09 10:49:09,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 86 transitions, 409 flow [2024-11-09 10:49:09,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:49:09,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:49:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 303 transitions. [2024-11-09 10:49:09,193 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5771428571428572 [2024-11-09 10:49:09,193 INFO L175 Difference]: Start difference. First operand has 93 places, 78 transitions, 287 flow. Second operand 7 states and 303 transitions. [2024-11-09 10:49:09,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 86 transitions, 409 flow [2024-11-09 10:49:09,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 86 transitions, 400 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:49:09,200 INFO L231 Difference]: Finished difference. Result has 95 places, 77 transitions, 296 flow [2024-11-09 10:49:09,200 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=296, PETRI_PLACES=95, PETRI_TRANSITIONS=77} [2024-11-09 10:49:09,201 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 15 predicate places. [2024-11-09 10:49:09,201 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 77 transitions, 296 flow [2024-11-09 10:49:09,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 39.625) internal successors, (317), 8 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:09,201 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:09,201 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:09,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:49:09,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:09,406 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:09,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:09,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1874449491, now seen corresponding path program 1 times [2024-11-09 10:49:09,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:09,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813964647] [2024-11-09 10:49:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:09,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:09,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:09,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813964647] [2024-11-09 10:49:09,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813964647] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:09,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:49:09,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 10:49:09,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483851680] [2024-11-09 10:49:09,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:09,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:49:09,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:09,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:49:09,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:49:09,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 75 [2024-11-09 10:49:09,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 77 transitions, 296 flow. Second operand has 6 states, 6 states have (on average 42.166666666666664) internal successors, (253), 6 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:09,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:09,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 75 [2024-11-09 10:49:09,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:09,902 INFO L124 PetriNetUnfolderBase]: 2297/4679 cut-off events. [2024-11-09 10:49:09,902 INFO L125 PetriNetUnfolderBase]: For 1368/1479 co-relation queries the response was YES. [2024-11-09 10:49:09,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10552 conditions, 4679 events. 2297/4679 cut-off events. For 1368/1479 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 37122 event pairs, 1008 based on Foata normal form. 159/4642 useless extension candidates. Maximal degree in co-relation 5307. Up to 1605 conditions per place. [2024-11-09 10:49:09,922 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 67 selfloop transitions, 7 changer transitions 0/111 dead transitions. [2024-11-09 10:49:09,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 111 transitions, 544 flow [2024-11-09 10:49:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:49:09,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:49:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 261 transitions. [2024-11-09 10:49:09,923 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.696 [2024-11-09 10:49:09,923 INFO L175 Difference]: Start difference. First operand has 95 places, 77 transitions, 296 flow. Second operand 5 states and 261 transitions. [2024-11-09 10:49:09,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 111 transitions, 544 flow [2024-11-09 10:49:09,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 111 transitions, 510 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:49:09,928 INFO L231 Difference]: Finished difference. Result has 96 places, 81 transitions, 314 flow [2024-11-09 10:49:09,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=96, PETRI_TRANSITIONS=81} [2024-11-09 10:49:09,929 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 16 predicate places. [2024-11-09 10:49:09,929 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 81 transitions, 314 flow [2024-11-09 10:49:09,929 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.166666666666664) internal successors, (253), 6 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:09,929 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:09,929 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:09,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:49:09,930 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:09,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:09,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1105805463, now seen corresponding path program 2 times [2024-11-09 10:49:09,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:09,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188219399] [2024-11-09 10:49:09,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:09,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:09,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:09,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:09,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188219399] [2024-11-09 10:49:09,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188219399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:09,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:49:09,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:49:09,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344850809] [2024-11-09 10:49:09,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:09,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:49:09,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:09,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:49:09,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:49:09,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 75 [2024-11-09 10:49:09,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 81 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:09,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:09,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 75 [2024-11-09 10:49:09,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:10,235 INFO L124 PetriNetUnfolderBase]: 1627/3345 cut-off events. [2024-11-09 10:49:10,236 INFO L125 PetriNetUnfolderBase]: For 922/1057 co-relation queries the response was YES. [2024-11-09 10:49:10,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7588 conditions, 3345 events. 1627/3345 cut-off events. For 922/1057 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 26038 event pairs, 1074 based on Foata normal form. 143/3136 useless extension candidates. Maximal degree in co-relation 4063. Up to 2385 conditions per place. [2024-11-09 10:49:10,248 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 45 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2024-11-09 10:49:10,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 91 transitions, 435 flow [2024-11-09 10:49:10,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:49:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:49:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2024-11-09 10:49:10,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7422222222222222 [2024-11-09 10:49:10,250 INFO L175 Difference]: Start difference. First operand has 96 places, 81 transitions, 314 flow. Second operand 3 states and 167 transitions. [2024-11-09 10:49:10,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 91 transitions, 435 flow [2024-11-09 10:49:10,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 91 transitions, 431 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:49:10,254 INFO L231 Difference]: Finished difference. Result has 98 places, 81 transitions, 318 flow [2024-11-09 10:49:10,254 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=318, PETRI_PLACES=98, PETRI_TRANSITIONS=81} [2024-11-09 10:49:10,256 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 18 predicate places. [2024-11-09 10:49:10,256 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 81 transitions, 318 flow [2024-11-09 10:49:10,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:10,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:10,257 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:10,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:49:10,257 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:10,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash 400551033, now seen corresponding path program 3 times [2024-11-09 10:49:10,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:10,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430924030] [2024-11-09 10:49:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:10,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:10,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:10,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:10,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430924030] [2024-11-09 10:49:10,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430924030] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:10,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:49:10,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 10:49:10,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231182643] [2024-11-09 10:49:10,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:10,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:49:10,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:10,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:49:10,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:49:10,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 75 [2024-11-09 10:49:10,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 81 transitions, 318 flow. Second operand has 6 states, 6 states have (on average 42.166666666666664) internal successors, (253), 6 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:10,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:10,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 75 [2024-11-09 10:49:10,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:10,579 INFO L124 PetriNetUnfolderBase]: 1331/3059 cut-off events. [2024-11-09 10:49:10,580 INFO L125 PetriNetUnfolderBase]: For 1363/1441 co-relation queries the response was YES. [2024-11-09 10:49:10,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7402 conditions, 3059 events. 1331/3059 cut-off events. For 1363/1441 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 23809 event pairs, 578 based on Foata normal form. 142/3091 useless extension candidates. Maximal degree in co-relation 4494. Up to 976 conditions per place. [2024-11-09 10:49:10,592 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 63 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-11-09 10:49:10,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 107 transitions, 526 flow [2024-11-09 10:49:10,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:49:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:49:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 258 transitions. [2024-11-09 10:49:10,595 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.688 [2024-11-09 10:49:10,595 INFO L175 Difference]: Start difference. First operand has 98 places, 81 transitions, 318 flow. Second operand 5 states and 258 transitions. [2024-11-09 10:49:10,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 107 transitions, 526 flow [2024-11-09 10:49:10,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 107 transitions, 516 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-09 10:49:10,601 INFO L231 Difference]: Finished difference. Result has 99 places, 81 transitions, 322 flow [2024-11-09 10:49:10,602 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=99, PETRI_TRANSITIONS=81} [2024-11-09 10:49:10,602 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 19 predicate places. [2024-11-09 10:49:10,602 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 81 transitions, 322 flow [2024-11-09 10:49:10,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.166666666666664) internal successors, (253), 6 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:10,602 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:10,602 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:10,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:49:10,602 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:10,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:10,603 INFO L85 PathProgramCache]: Analyzing trace with hash 3704108, now seen corresponding path program 1 times [2024-11-09 10:49:10,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:10,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933585652] [2024-11-09 10:49:10,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:10,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:10,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:10,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933585652] [2024-11-09 10:49:10,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933585652] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:10,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100653791] [2024-11-09 10:49:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:10,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:10,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:10,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:10,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:49:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:10,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:49:10,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:11,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:11,063 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:11,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-09 10:49:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:11,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100653791] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:49:11,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:49:11,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2024-11-09 10:49:11,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305971605] [2024-11-09 10:49:11,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:49:11,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 10:49:11,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 10:49:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2024-11-09 10:49:12,223 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 75 [2024-11-09 10:49:12,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 81 transitions, 322 flow. Second operand has 21 states, 21 states have (on average 36.714285714285715) internal successors, (771), 21 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:12,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:12,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 75 [2024-11-09 10:49:12,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:13,063 INFO L124 PetriNetUnfolderBase]: 1635/3083 cut-off events. [2024-11-09 10:49:13,063 INFO L125 PetriNetUnfolderBase]: For 1820/2140 co-relation queries the response was YES. [2024-11-09 10:49:13,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7882 conditions, 3083 events. 1635/3083 cut-off events. For 1820/2140 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 21392 event pairs, 276 based on Foata normal form. 332/3335 useless extension candidates. Maximal degree in co-relation 4432. Up to 840 conditions per place. [2024-11-09 10:49:13,076 INFO L140 encePairwiseOnDemand]: 60/75 looper letters, 115 selfloop transitions, 32 changer transitions 0/179 dead transitions. [2024-11-09 10:49:13,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 179 transitions, 900 flow [2024-11-09 10:49:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 10:49:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-09 10:49:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 827 transitions. [2024-11-09 10:49:13,079 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5513333333333333 [2024-11-09 10:49:13,079 INFO L175 Difference]: Start difference. First operand has 99 places, 81 transitions, 322 flow. Second operand 20 states and 827 transitions. [2024-11-09 10:49:13,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 179 transitions, 900 flow [2024-11-09 10:49:13,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 179 transitions, 888 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-09 10:49:13,084 INFO L231 Difference]: Finished difference. Result has 117 places, 93 transitions, 433 flow [2024-11-09 10:49:13,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=433, PETRI_PLACES=117, PETRI_TRANSITIONS=93} [2024-11-09 10:49:13,085 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 37 predicate places. [2024-11-09 10:49:13,085 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 93 transitions, 433 flow [2024-11-09 10:49:13,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 36.714285714285715) internal successors, (771), 21 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:13,086 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:13,086 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:13,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-09 10:49:13,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:13,286 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:13,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:13,287 INFO L85 PathProgramCache]: Analyzing trace with hash -126970559, now seen corresponding path program 1 times [2024-11-09 10:49:13,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:13,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485117177] [2024-11-09 10:49:13,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:13,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:13,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:13,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485117177] [2024-11-09 10:49:13,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485117177] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:13,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942623108] [2024-11-09 10:49:13,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:13,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:13,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:13,452 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:13,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:49:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:13,512 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 10:49:13,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:13,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:13,710 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:13,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2024-11-09 10:49:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:14,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942623108] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:49:14,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:49:14,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2024-11-09 10:49:14,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173418263] [2024-11-09 10:49:14,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:49:14,017 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 10:49:14,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:14,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 10:49:14,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2024-11-09 10:49:14,619 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 75 [2024-11-09 10:49:14,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 93 transitions, 433 flow. Second operand has 21 states, 21 states have (on average 36.714285714285715) internal successors, (771), 21 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:14,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:14,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 75 [2024-11-09 10:49:14,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:15,350 INFO L124 PetriNetUnfolderBase]: 1635/3019 cut-off events. [2024-11-09 10:49:15,350 INFO L125 PetriNetUnfolderBase]: For 2125/2413 co-relation queries the response was YES. [2024-11-09 10:49:15,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8298 conditions, 3019 events. 1635/3019 cut-off events. For 2125/2413 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20491 event pairs, 278 based on Foata normal form. 320/3259 useless extension candidates. Maximal degree in co-relation 5313. Up to 882 conditions per place. [2024-11-09 10:49:15,363 INFO L140 encePairwiseOnDemand]: 60/75 looper letters, 116 selfloop transitions, 33 changer transitions 0/180 dead transitions. [2024-11-09 10:49:15,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 180 transitions, 973 flow [2024-11-09 10:49:15,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 10:49:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-09 10:49:15,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 828 transitions. [2024-11-09 10:49:15,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.552 [2024-11-09 10:49:15,365 INFO L175 Difference]: Start difference. First operand has 117 places, 93 transitions, 433 flow. Second operand 20 states and 828 transitions. [2024-11-09 10:49:15,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 180 transitions, 973 flow [2024-11-09 10:49:15,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 180 transitions, 937 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-11-09 10:49:15,372 INFO L231 Difference]: Finished difference. Result has 125 places, 93 transitions, 463 flow [2024-11-09 10:49:15,372 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=463, PETRI_PLACES=125, PETRI_TRANSITIONS=93} [2024-11-09 10:49:15,373 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 45 predicate places. [2024-11-09 10:49:15,373 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 93 transitions, 463 flow [2024-11-09 10:49:15,373 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 36.714285714285715) internal successors, (771), 21 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:15,373 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:15,373 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:15,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:49:15,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-09 10:49:15,578 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:15,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:15,578 INFO L85 PathProgramCache]: Analyzing trace with hash -671557404, now seen corresponding path program 1 times [2024-11-09 10:49:15,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:15,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220370996] [2024-11-09 10:49:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:15,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:15,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:15,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220370996] [2024-11-09 10:49:15,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220370996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:15,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040416581] [2024-11-09 10:49:15,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:15,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:15,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:15,989 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:15,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:49:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:16,070 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 10:49:16,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:16,308 INFO L349 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2024-11-09 10:49:16,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 20 [2024-11-09 10:49:16,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:16,415 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:16,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:16,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 38 [2024-11-09 10:49:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:16,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040416581] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:49:16,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:49:16,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 30 [2024-11-09 10:49:16,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344932609] [2024-11-09 10:49:16,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:49:16,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-09 10:49:16,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:16,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-09 10:49:16,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2024-11-09 10:49:17,391 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 75 [2024-11-09 10:49:17,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 93 transitions, 463 flow. Second operand has 30 states, 30 states have (on average 36.233333333333334) internal successors, (1087), 30 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:17,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:17,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 75 [2024-11-09 10:49:17,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:18,806 INFO L124 PetriNetUnfolderBase]: 3271/5778 cut-off events. [2024-11-09 10:49:18,806 INFO L125 PetriNetUnfolderBase]: For 6568/6875 co-relation queries the response was YES. [2024-11-09 10:49:18,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16996 conditions, 5778 events. 3271/5778 cut-off events. For 6568/6875 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 38463 event pairs, 949 based on Foata normal form. 210/5832 useless extension candidates. Maximal degree in co-relation 11515. Up to 2356 conditions per place. [2024-11-09 10:49:18,824 INFO L140 encePairwiseOnDemand]: 55/75 looper letters, 49 selfloop transitions, 13 changer transitions 201/289 dead transitions. [2024-11-09 10:49:18,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 289 transitions, 1817 flow [2024-11-09 10:49:18,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 10:49:18,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-09 10:49:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1329 transitions. [2024-11-09 10:49:18,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.536969696969697 [2024-11-09 10:49:18,829 INFO L175 Difference]: Start difference. First operand has 125 places, 93 transitions, 463 flow. Second operand 33 states and 1329 transitions. [2024-11-09 10:49:18,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 289 transitions, 1817 flow [2024-11-09 10:49:18,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 289 transitions, 1651 flow, removed 2 selfloop flow, removed 17 redundant places. [2024-11-09 10:49:18,842 INFO L231 Difference]: Finished difference. Result has 147 places, 78 transitions, 379 flow [2024-11-09 10:49:18,843 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=379, PETRI_PLACES=147, PETRI_TRANSITIONS=78} [2024-11-09 10:49:18,843 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 67 predicate places. [2024-11-09 10:49:18,843 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 78 transitions, 379 flow [2024-11-09 10:49:18,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 36.233333333333334) internal successors, (1087), 30 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:18,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:18,844 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:18,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-09 10:49:19,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 10:49:19,048 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:19,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:19,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2049914011, now seen corresponding path program 2 times [2024-11-09 10:49:19,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:19,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168353201] [2024-11-09 10:49:19,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:19,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:19,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:20,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:20,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:20,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168353201] [2024-11-09 10:49:20,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168353201] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:20,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545884588] [2024-11-09 10:49:20,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:49:20,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:20,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:20,969 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:20,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:49:21,041 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:49:21,041 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:21,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:49:21,044 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:21,341 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:21,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:49:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:21,348 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:21,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545884588] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:21,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:21,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 26 [2024-11-09 10:49:21,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514947568] [2024-11-09 10:49:21,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:21,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:49:21,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:21,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:49:21,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:49:21,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:49:21,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 78 transitions, 379 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:21,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:21,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:49:21,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:22,701 INFO L124 PetriNetUnfolderBase]: 2044/3545 cut-off events. [2024-11-09 10:49:22,701 INFO L125 PetriNetUnfolderBase]: For 5976/6167 co-relation queries the response was YES. [2024-11-09 10:49:22,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11391 conditions, 3545 events. 2044/3545 cut-off events. For 5976/6167 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20069 event pairs, 472 based on Foata normal form. 153/3647 useless extension candidates. Maximal degree in co-relation 11365. Up to 2613 conditions per place. [2024-11-09 10:49:22,714 INFO L140 encePairwiseOnDemand]: 57/75 looper letters, 94 selfloop transitions, 23 changer transitions 45/185 dead transitions. [2024-11-09 10:49:22,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 185 transitions, 1287 flow [2024-11-09 10:49:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 10:49:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-09 10:49:22,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 746 transitions. [2024-11-09 10:49:22,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5235087719298246 [2024-11-09 10:49:22,716 INFO L175 Difference]: Start difference. First operand has 147 places, 78 transitions, 379 flow. Second operand 19 states and 746 transitions. [2024-11-09 10:49:22,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 185 transitions, 1287 flow [2024-11-09 10:49:22,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 185 transitions, 1099 flow, removed 52 selfloop flow, removed 18 redundant places. [2024-11-09 10:49:22,726 INFO L231 Difference]: Finished difference. Result has 128 places, 93 transitions, 543 flow [2024-11-09 10:49:22,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=543, PETRI_PLACES=128, PETRI_TRANSITIONS=93} [2024-11-09 10:49:22,727 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 48 predicate places. [2024-11-09 10:49:22,727 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 93 transitions, 543 flow [2024-11-09 10:49:22,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:22,727 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:22,728 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:22,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 10:49:22,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-09 10:49:22,929 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:22,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:22,929 INFO L85 PathProgramCache]: Analyzing trace with hash 149550201, now seen corresponding path program 3 times [2024-11-09 10:49:22,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:22,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298187205] [2024-11-09 10:49:22,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:22,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:24,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:24,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:24,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298187205] [2024-11-09 10:49:24,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298187205] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:24,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066676128] [2024-11-09 10:49:24,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:49:24,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:24,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:24,106 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:24,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:49:24,177 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-09 10:49:24,177 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:24,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:49:24,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:24,496 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:24,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:49:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:24,502 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:24,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066676128] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:24,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:24,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 26 [2024-11-09 10:49:24,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000259124] [2024-11-09 10:49:24,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:24,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:49:24,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:24,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:49:24,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:49:24,945 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:49:24,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 93 transitions, 543 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:24,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:24,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:49:24,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:26,103 INFO L124 PetriNetUnfolderBase]: 2310/3957 cut-off events. [2024-11-09 10:49:26,104 INFO L125 PetriNetUnfolderBase]: For 5942/6185 co-relation queries the response was YES. [2024-11-09 10:49:26,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13046 conditions, 3957 events. 2310/3957 cut-off events. For 5942/6185 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 22953 event pairs, 541 based on Foata normal form. 205/4101 useless extension candidates. Maximal degree in co-relation 13013. Up to 2396 conditions per place. [2024-11-09 10:49:26,123 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 114 selfloop transitions, 43 changer transitions 38/218 dead transitions. [2024-11-09 10:49:26,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 218 transitions, 1551 flow [2024-11-09 10:49:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 10:49:26,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-09 10:49:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 910 transitions. [2024-11-09 10:49:26,125 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5055555555555555 [2024-11-09 10:49:26,125 INFO L175 Difference]: Start difference. First operand has 128 places, 93 transitions, 543 flow. Second operand 24 states and 910 transitions. [2024-11-09 10:49:26,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 218 transitions, 1551 flow [2024-11-09 10:49:26,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 218 transitions, 1420 flow, removed 54 selfloop flow, removed 9 redundant places. [2024-11-09 10:49:26,142 INFO L231 Difference]: Finished difference. Result has 149 places, 127 transitions, 900 flow [2024-11-09 10:49:26,142 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=900, PETRI_PLACES=149, PETRI_TRANSITIONS=127} [2024-11-09 10:49:26,142 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 69 predicate places. [2024-11-09 10:49:26,142 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 127 transitions, 900 flow [2024-11-09 10:49:26,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:26,143 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:26,143 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:26,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 10:49:26,346 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-09 10:49:26,347 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:26,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:26,347 INFO L85 PathProgramCache]: Analyzing trace with hash -814293767, now seen corresponding path program 4 times [2024-11-09 10:49:26,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:26,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929210041] [2024-11-09 10:49:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:26,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:27,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:27,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:27,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929210041] [2024-11-09 10:49:27,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929210041] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:27,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91038728] [2024-11-09 10:49:27,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:49:27,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:27,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:27,252 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:27,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:49:27,349 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:49:27,350 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:27,351 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:49:27,354 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:27,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:27,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:49:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:27,682 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:27,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91038728] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:27,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:27,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 26 [2024-11-09 10:49:27,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35974953] [2024-11-09 10:49:27,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:27,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:49:27,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:49:27,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:49:28,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:49:28,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 127 transitions, 900 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:28,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:28,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:49:28,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:29,450 INFO L124 PetriNetUnfolderBase]: 2842/4793 cut-off events. [2024-11-09 10:49:29,451 INFO L125 PetriNetUnfolderBase]: For 12573/12843 co-relation queries the response was YES. [2024-11-09 10:49:29,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17851 conditions, 4793 events. 2842/4793 cut-off events. For 12573/12843 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 28479 event pairs, 846 based on Foata normal form. 232/4924 useless extension candidates. Maximal degree in co-relation 17809. Up to 3283 conditions per place. [2024-11-09 10:49:29,472 INFO L140 encePairwiseOnDemand]: 57/75 looper letters, 141 selfloop transitions, 57 changer transitions 38/259 dead transitions. [2024-11-09 10:49:29,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 259 transitions, 2159 flow [2024-11-09 10:49:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-09 10:49:29,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-11-09 10:49:29,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1048 transitions. [2024-11-09 10:49:29,474 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4990476190476191 [2024-11-09 10:49:29,474 INFO L175 Difference]: Start difference. First operand has 149 places, 127 transitions, 900 flow. Second operand 28 states and 1048 transitions. [2024-11-09 10:49:29,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 259 transitions, 2159 flow [2024-11-09 10:49:29,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 259 transitions, 2036 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-11-09 10:49:29,504 INFO L231 Difference]: Finished difference. Result has 179 places, 165 transitions, 1411 flow [2024-11-09 10:49:29,505 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1411, PETRI_PLACES=179, PETRI_TRANSITIONS=165} [2024-11-09 10:49:29,508 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 99 predicate places. [2024-11-09 10:49:29,508 INFO L471 AbstractCegarLoop]: Abstraction has has 179 places, 165 transitions, 1411 flow [2024-11-09 10:49:29,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:29,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:29,509 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:29,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 10:49:29,709 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:29,709 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:29,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash -29724343, now seen corresponding path program 5 times [2024-11-09 10:49:29,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:29,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930205577] [2024-11-09 10:49:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:29,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:30,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:30,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:30,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930205577] [2024-11-09 10:49:30,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930205577] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:30,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306571805] [2024-11-09 10:49:30,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:49:30,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:30,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:30,936 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:30,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:49:31,014 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-09 10:49:31,014 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:31,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 10:49:31,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:31,291 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:31,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:49:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:31,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:31,522 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-09 10:49:31,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-09 10:49:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:31,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306571805] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:31,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:49:31,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18, 13] total 34 [2024-11-09 10:49:31,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083140880] [2024-11-09 10:49:31,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:31,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:49:31,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:49:31,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 10:49:31,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:49:31,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 165 transitions, 1411 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:31,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:31,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:49:31,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:32,986 INFO L124 PetriNetUnfolderBase]: 3114/5181 cut-off events. [2024-11-09 10:49:32,986 INFO L125 PetriNetUnfolderBase]: For 20452/20777 co-relation queries the response was YES. [2024-11-09 10:49:33,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21226 conditions, 5181 events. 3114/5181 cut-off events. For 20452/20777 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 31218 event pairs, 613 based on Foata normal form. 273/5358 useless extension candidates. Maximal degree in co-relation 21173. Up to 2844 conditions per place. [2024-11-09 10:49:33,016 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 188 selfloop transitions, 51 changer transitions 37/299 dead transitions. [2024-11-09 10:49:33,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 299 transitions, 2845 flow [2024-11-09 10:49:33,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 10:49:33,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-09 10:49:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 829 transitions. [2024-11-09 10:49:33,017 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5263492063492063 [2024-11-09 10:49:33,017 INFO L175 Difference]: Start difference. First operand has 179 places, 165 transitions, 1411 flow. Second operand 21 states and 829 transitions. [2024-11-09 10:49:33,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 299 transitions, 2845 flow [2024-11-09 10:49:33,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 299 transitions, 2635 flow, removed 88 selfloop flow, removed 9 redundant places. [2024-11-09 10:49:33,070 INFO L231 Difference]: Finished difference. Result has 194 places, 189 transitions, 1669 flow [2024-11-09 10:49:33,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1669, PETRI_PLACES=194, PETRI_TRANSITIONS=189} [2024-11-09 10:49:33,070 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 114 predicate places. [2024-11-09 10:49:33,070 INFO L471 AbstractCegarLoop]: Abstraction has has 194 places, 189 transitions, 1669 flow [2024-11-09 10:49:33,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:33,070 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:33,070 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:33,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 10:49:33,271 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2024-11-09 10:49:33,271 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:33,271 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:33,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1845051017, now seen corresponding path program 6 times [2024-11-09 10:49:33,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:33,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483814023] [2024-11-09 10:49:33,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:33,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:34,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:34,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483814023] [2024-11-09 10:49:34,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483814023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:34,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846169148] [2024-11-09 10:49:34,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:49:34,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:34,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:34,446 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:34,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:49:34,523 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-09 10:49:34,523 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:34,526 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:49:34,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:34,750 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:34,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:49:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:34,758 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:34,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846169148] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:34,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:34,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 26 [2024-11-09 10:49:34,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375679096] [2024-11-09 10:49:34,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:34,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:49:34,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:49:34,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:49:35,107 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:49:35,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 189 transitions, 1669 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:35,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:35,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:49:35,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:36,420 INFO L124 PetriNetUnfolderBase]: 3516/5799 cut-off events. [2024-11-09 10:49:36,420 INFO L125 PetriNetUnfolderBase]: For 28549/28888 co-relation queries the response was YES. [2024-11-09 10:49:36,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25052 conditions, 5799 events. 3516/5799 cut-off events. For 28549/28888 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 35530 event pairs, 779 based on Foata normal form. 281/5961 useless extension candidates. Maximal degree in co-relation 24994. Up to 3885 conditions per place. [2024-11-09 10:49:36,463 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 213 selfloop transitions, 48 changer transitions 38/322 dead transitions. [2024-11-09 10:49:36,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 322 transitions, 2990 flow [2024-11-09 10:49:36,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 10:49:36,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-09 10:49:36,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 837 transitions. [2024-11-09 10:49:36,464 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5314285714285715 [2024-11-09 10:49:36,464 INFO L175 Difference]: Start difference. First operand has 194 places, 189 transitions, 1669 flow. Second operand 21 states and 837 transitions. [2024-11-09 10:49:36,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 322 transitions, 2990 flow [2024-11-09 10:49:36,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 322 transitions, 2813 flow, removed 77 selfloop flow, removed 9 redundant places. [2024-11-09 10:49:36,552 INFO L231 Difference]: Finished difference. Result has 209 places, 208 transitions, 1930 flow [2024-11-09 10:49:36,553 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1930, PETRI_PLACES=209, PETRI_TRANSITIONS=208} [2024-11-09 10:49:36,553 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 129 predicate places. [2024-11-09 10:49:36,554 INFO L471 AbstractCegarLoop]: Abstraction has has 209 places, 208 transitions, 1930 flow [2024-11-09 10:49:36,554 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:36,554 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:36,554 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:36,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 10:49:36,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:36,755 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:36,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:36,755 INFO L85 PathProgramCache]: Analyzing trace with hash 186836491, now seen corresponding path program 7 times [2024-11-09 10:49:36,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:36,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977584706] [2024-11-09 10:49:36,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:36,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:37,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:37,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:37,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977584706] [2024-11-09 10:49:37,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977584706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:37,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374338914] [2024-11-09 10:49:37,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:49:37,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:37,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:37,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:37,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 10:49:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:37,763 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 10:49:37,764 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:37,971 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:37,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:49:37,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:37,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:38,173 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-09 10:49:38,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-09 10:49:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:38,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374338914] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:38,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:49:38,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18, 13] total 32 [2024-11-09 10:49:38,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665008444] [2024-11-09 10:49:38,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:38,209 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:49:38,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:38,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:49:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2024-11-09 10:49:38,451 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:49:38,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 208 transitions, 1930 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:38,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:38,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:49:38,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:39,647 INFO L124 PetriNetUnfolderBase]: 3764/6197 cut-off events. [2024-11-09 10:49:39,647 INFO L125 PetriNetUnfolderBase]: For 37256/37591 co-relation queries the response was YES. [2024-11-09 10:49:39,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28617 conditions, 6197 events. 3764/6197 cut-off events. For 37256/37591 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 38213 event pairs, 867 based on Foata normal form. 277/6347 useless extension candidates. Maximal degree in co-relation 28555. Up to 4491 conditions per place. [2024-11-09 10:49:39,683 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 225 selfloop transitions, 62 changer transitions 34/344 dead transitions. [2024-11-09 10:49:39,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 344 transitions, 3315 flow [2024-11-09 10:49:39,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-09 10:49:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-09 10:49:39,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 870 transitions. [2024-11-09 10:49:39,684 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-09 10:49:39,685 INFO L175 Difference]: Start difference. First operand has 209 places, 208 transitions, 1930 flow. Second operand 22 states and 870 transitions. [2024-11-09 10:49:39,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 344 transitions, 3315 flow [2024-11-09 10:49:39,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 344 transitions, 3093 flow, removed 89 selfloop flow, removed 8 redundant places. [2024-11-09 10:49:39,775 INFO L231 Difference]: Finished difference. Result has 227 places, 235 transitions, 2239 flow [2024-11-09 10:49:39,775 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2239, PETRI_PLACES=227, PETRI_TRANSITIONS=235} [2024-11-09 10:49:39,776 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 147 predicate places. [2024-11-09 10:49:39,776 INFO L471 AbstractCegarLoop]: Abstraction has has 227 places, 235 transitions, 2239 flow [2024-11-09 10:49:39,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:39,776 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:39,776 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:39,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 10:49:39,976 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:39,977 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:39,977 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:39,977 INFO L85 PathProgramCache]: Analyzing trace with hash 230615949, now seen corresponding path program 8 times [2024-11-09 10:49:39,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:39,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551489712] [2024-11-09 10:49:39,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:39,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:41,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:41,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551489712] [2024-11-09 10:49:41,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551489712] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:41,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984002679] [2024-11-09 10:49:41,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:49:41,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:41,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:41,145 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:41,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 10:49:41,209 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:49:41,209 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:41,211 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:49:41,212 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:41,467 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:41,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:49:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:41,492 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:41,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984002679] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:41,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:41,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [19] total 28 [2024-11-09 10:49:41,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281644805] [2024-11-09 10:49:41,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:41,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:49:41,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:41,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:49:41,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=695, Unknown=0, NotChecked=0, Total=756 [2024-11-09 10:49:41,793 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:49:41,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 235 transitions, 2239 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:41,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:41,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:49:41,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:43,263 INFO L124 PetriNetUnfolderBase]: 3890/6394 cut-off events. [2024-11-09 10:49:43,264 INFO L125 PetriNetUnfolderBase]: For 40608/40943 co-relation queries the response was YES. [2024-11-09 10:49:43,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30522 conditions, 6394 events. 3890/6394 cut-off events. For 40608/40943 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 39720 event pairs, 763 based on Foata normal form. 277/6552 useless extension candidates. Maximal degree in co-relation 30390. Up to 4312 conditions per place. [2024-11-09 10:49:43,303 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 233 selfloop transitions, 70 changer transitions 28/354 dead transitions. [2024-11-09 10:49:43,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 354 transitions, 3515 flow [2024-11-09 10:49:43,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 10:49:43,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-09 10:49:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 841 transitions. [2024-11-09 10:49:43,305 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.533968253968254 [2024-11-09 10:49:43,305 INFO L175 Difference]: Start difference. First operand has 227 places, 235 transitions, 2239 flow. Second operand 21 states and 841 transitions. [2024-11-09 10:49:43,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 354 transitions, 3515 flow [2024-11-09 10:49:43,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 354 transitions, 3385 flow, removed 36 selfloop flow, removed 11 redundant places. [2024-11-09 10:49:43,399 INFO L231 Difference]: Finished difference. Result has 239 places, 247 transitions, 2441 flow [2024-11-09 10:49:43,400 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2131, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2441, PETRI_PLACES=239, PETRI_TRANSITIONS=247} [2024-11-09 10:49:43,400 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 159 predicate places. [2024-11-09 10:49:43,400 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 247 transitions, 2441 flow [2024-11-09 10:49:43,400 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:43,400 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:43,400 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:43,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 10:49:43,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 10:49:43,601 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:43,601 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:43,601 INFO L85 PathProgramCache]: Analyzing trace with hash 2143701779, now seen corresponding path program 9 times [2024-11-09 10:49:43,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:43,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468935024] [2024-11-09 10:49:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:43,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:44,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468935024] [2024-11-09 10:49:44,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468935024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:44,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792731396] [2024-11-09 10:49:44,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:49:44,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:44,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:44,349 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:44,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 10:49:44,442 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-09 10:49:44,442 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:44,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:49:44,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:44,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:44,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:49:44,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:44,663 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:44,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792731396] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:44,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:44,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 26 [2024-11-09 10:49:44,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400760389] [2024-11-09 10:49:44,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:44,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:49:44,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:44,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:49:44,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:49:44,982 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:49:44,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 247 transitions, 2441 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:44,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:44,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:49:44,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:46,735 INFO L124 PetriNetUnfolderBase]: 3989/6591 cut-off events. [2024-11-09 10:49:46,736 INFO L125 PetriNetUnfolderBase]: For 42479/42814 co-relation queries the response was YES. [2024-11-09 10:49:46,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32257 conditions, 6591 events. 3989/6591 cut-off events. For 42479/42814 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 41164 event pairs, 727 based on Foata normal form. 277/6749 useless extension candidates. Maximal degree in co-relation 32122. Up to 4236 conditions per place. [2024-11-09 10:49:46,788 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 252 selfloop transitions, 75 changer transitions 34/384 dead transitions. [2024-11-09 10:49:46,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 384 transitions, 3834 flow [2024-11-09 10:49:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 10:49:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-09 10:49:46,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 987 transitions. [2024-11-09 10:49:46,790 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5264 [2024-11-09 10:49:46,790 INFO L175 Difference]: Start difference. First operand has 239 places, 247 transitions, 2441 flow. Second operand 25 states and 987 transitions. [2024-11-09 10:49:46,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 384 transitions, 3834 flow [2024-11-09 10:49:46,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 384 transitions, 3602 flow, removed 65 selfloop flow, removed 14 redundant places. [2024-11-09 10:49:46,938 INFO L231 Difference]: Finished difference. Result has 256 places, 255 transitions, 2544 flow [2024-11-09 10:49:46,938 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2544, PETRI_PLACES=256, PETRI_TRANSITIONS=255} [2024-11-09 10:49:46,938 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 176 predicate places. [2024-11-09 10:49:46,938 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 255 transitions, 2544 flow [2024-11-09 10:49:46,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:46,938 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:46,939 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:46,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 10:49:47,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:47,139 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:47,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:47,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1374307055, now seen corresponding path program 10 times [2024-11-09 10:49:47,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:47,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551889419] [2024-11-09 10:49:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:47,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:47,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:47,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:47,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551889419] [2024-11-09 10:49:47,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551889419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:47,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499885934] [2024-11-09 10:49:47,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:49:47,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:47,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:47,969 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:47,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 10:49:48,065 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:49:48,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:48,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:49:48,067 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:48,271 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:48,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:49:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:48,278 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:48,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499885934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:48,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:48,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 26 [2024-11-09 10:49:48,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17454112] [2024-11-09 10:49:48,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:48,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:49:48,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:48,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:49:48,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=598, Unknown=0, NotChecked=0, Total=650 [2024-11-09 10:49:48,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:49:48,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 255 transitions, 2544 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:48,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:48,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:49:48,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:50,219 INFO L124 PetriNetUnfolderBase]: 4070/6752 cut-off events. [2024-11-09 10:49:50,219 INFO L125 PetriNetUnfolderBase]: For 45162/45497 co-relation queries the response was YES. [2024-11-09 10:49:50,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33537 conditions, 6752 events. 4070/6752 cut-off events. For 45162/45497 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 42518 event pairs, 779 based on Foata normal form. 277/6910 useless extension candidates. Maximal degree in co-relation 33450. Up to 4462 conditions per place. [2024-11-09 10:49:50,272 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 254 selfloop transitions, 74 changer transitions 33/384 dead transitions. [2024-11-09 10:49:50,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 384 transitions, 3861 flow [2024-11-09 10:49:50,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 10:49:50,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-09 10:49:50,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 987 transitions. [2024-11-09 10:49:50,274 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5264 [2024-11-09 10:49:50,274 INFO L175 Difference]: Start difference. First operand has 256 places, 255 transitions, 2544 flow. Second operand 25 states and 987 transitions. [2024-11-09 10:49:50,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 384 transitions, 3861 flow [2024-11-09 10:49:50,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 384 transitions, 3641 flow, removed 33 selfloop flow, removed 19 redundant places. [2024-11-09 10:49:50,409 INFO L231 Difference]: Finished difference. Result has 264 places, 257 transitions, 2585 flow [2024-11-09 10:49:50,409 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2585, PETRI_PLACES=264, PETRI_TRANSITIONS=257} [2024-11-09 10:49:50,409 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 184 predicate places. [2024-11-09 10:49:50,409 INFO L471 AbstractCegarLoop]: Abstraction has has 264 places, 257 transitions, 2585 flow [2024-11-09 10:49:50,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:50,410 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:50,410 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:50,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 10:49:50,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:50,610 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:50,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:50,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1498842757, now seen corresponding path program 11 times [2024-11-09 10:49:50,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:50,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104020229] [2024-11-09 10:49:50,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:50,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:51,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:51,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104020229] [2024-11-09 10:49:51,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104020229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:51,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619170506] [2024-11-09 10:49:51,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:49:51,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:51,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:51,430 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:51,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 10:49:51,507 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-09 10:49:51,508 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:51,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 10:49:51,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:51,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:51,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:49:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:51,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:51,972 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-09 10:49:51,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-09 10:49:51,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:51,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619170506] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:51,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:49:51,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18, 13] total 34 [2024-11-09 10:49:51,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780785407] [2024-11-09 10:49:51,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:51,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:49:51,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:52,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:49:52,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 10:49:52,244 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:49:52,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 257 transitions, 2585 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:52,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:52,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:49:52,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:53,875 INFO L124 PetriNetUnfolderBase]: 4485/7441 cut-off events. [2024-11-09 10:49:53,875 INFO L125 PetriNetUnfolderBase]: For 55619/55954 co-relation queries the response was YES. [2024-11-09 10:49:53,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37904 conditions, 7441 events. 4485/7441 cut-off events. For 55619/55954 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 47556 event pairs, 867 based on Foata normal form. 277/7591 useless extension candidates. Maximal degree in co-relation 37810. Up to 4680 conditions per place. [2024-11-09 10:49:53,936 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 279 selfloop transitions, 73 changer transitions 32/407 dead transitions. [2024-11-09 10:49:53,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 407 transitions, 4262 flow [2024-11-09 10:49:53,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-09 10:49:53,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-09 10:49:53,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 982 transitions. [2024-11-09 10:49:53,937 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5237333333333334 [2024-11-09 10:49:53,938 INFO L175 Difference]: Start difference. First operand has 264 places, 257 transitions, 2585 flow. Second operand 25 states and 982 transitions. [2024-11-09 10:49:53,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 407 transitions, 4262 flow [2024-11-09 10:49:54,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 407 transitions, 3979 flow, removed 63 selfloop flow, removed 22 redundant places. [2024-11-09 10:49:54,114 INFO L231 Difference]: Finished difference. Result has 273 places, 273 transitions, 2857 flow [2024-11-09 10:49:54,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2857, PETRI_PLACES=273, PETRI_TRANSITIONS=273} [2024-11-09 10:49:54,115 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 193 predicate places. [2024-11-09 10:49:54,115 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 273 transitions, 2857 flow [2024-11-09 10:49:54,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:54,115 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:54,116 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:54,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-11-09 10:49:54,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:54,319 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:54,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:54,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1099119821, now seen corresponding path program 12 times [2024-11-09 10:49:54,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:54,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037461448] [2024-11-09 10:49:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:54,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:55,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:55,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037461448] [2024-11-09 10:49:55,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037461448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:55,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038431356] [2024-11-09 10:49:55,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:49:55,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:55,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:55,153 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:55,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-09 10:49:55,226 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-09 10:49:55,226 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:49:55,227 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:49:55,229 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:55,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:55,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:49:55,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:55,425 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:49:55,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038431356] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:49:55,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:49:55,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 25 [2024-11-09 10:49:55,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412731928] [2024-11-09 10:49:55,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:55,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:49:55,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:55,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:49:55,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2024-11-09 10:49:55,733 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:49:55,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 273 transitions, 2857 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:55,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:55,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:49:55,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:49:57,409 INFO L124 PetriNetUnfolderBase]: 4430/7373 cut-off events. [2024-11-09 10:49:57,410 INFO L125 PetriNetUnfolderBase]: For 56316/56651 co-relation queries the response was YES. [2024-11-09 10:49:57,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38137 conditions, 7373 events. 4430/7373 cut-off events. For 56316/56651 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 47436 event pairs, 785 based on Foata normal form. 278/7532 useless extension candidates. Maximal degree in co-relation 38039. Up to 4862 conditions per place. [2024-11-09 10:49:57,480 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 254 selfloop transitions, 89 changer transitions 35/401 dead transitions. [2024-11-09 10:49:57,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 401 transitions, 4141 flow [2024-11-09 10:49:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 10:49:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-09 10:49:57,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1021 transitions. [2024-11-09 10:49:57,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5235897435897436 [2024-11-09 10:49:57,482 INFO L175 Difference]: Start difference. First operand has 273 places, 273 transitions, 2857 flow. Second operand 26 states and 1021 transitions. [2024-11-09 10:49:57,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 401 transitions, 4141 flow [2024-11-09 10:49:57,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 401 transitions, 3959 flow, removed 46 selfloop flow, removed 15 redundant places. [2024-11-09 10:49:57,816 INFO L231 Difference]: Finished difference. Result has 282 places, 275 transitions, 2925 flow [2024-11-09 10:49:57,817 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2698, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2925, PETRI_PLACES=282, PETRI_TRANSITIONS=275} [2024-11-09 10:49:57,817 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 202 predicate places. [2024-11-09 10:49:57,817 INFO L471 AbstractCegarLoop]: Abstraction has has 282 places, 275 transitions, 2925 flow [2024-11-09 10:49:57,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:57,818 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:49:57,818 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:49:57,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-09 10:49:58,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 10:49:58,019 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:49:58,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:49:58,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1298772749, now seen corresponding path program 13 times [2024-11-09 10:49:58,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:49:58,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406374363] [2024-11-09 10:49:58,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:49:58,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:49:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:58,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:49:58,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:49:58,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406374363] [2024-11-09 10:49:58,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406374363] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:58,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297404284] [2024-11-09 10:49:58,785 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:49:58,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:49:58,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:49:58,786 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:49:58,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-09 10:49:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:49:58,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 10:49:58,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:49:59,090 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:49:59,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:49:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:49:59,097 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:49:59,336 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-09 10:49:59,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-09 10:49:59,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:49:59,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297404284] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:49:59,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:49:59,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18, 13] total 34 [2024-11-09 10:49:59,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211930038] [2024-11-09 10:49:59,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:49:59,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:49:59,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:49:59,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:49:59,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1046, Unknown=0, NotChecked=0, Total=1122 [2024-11-09 10:49:59,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:49:59,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 275 transitions, 2925 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:49:59,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:49:59,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:49:59,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:01,402 INFO L124 PetriNetUnfolderBase]: 4685/7820 cut-off events. [2024-11-09 10:50:01,402 INFO L125 PetriNetUnfolderBase]: For 55914/56249 co-relation queries the response was YES. [2024-11-09 10:50:01,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40122 conditions, 7820 events. 4685/7820 cut-off events. For 55914/56249 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 50700 event pairs, 907 based on Foata normal form. 277/7978 useless extension candidates. Maximal degree in co-relation 39976. Up to 5022 conditions per place. [2024-11-09 10:50:01,487 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 297 selfloop transitions, 78 changer transitions 34/432 dead transitions. [2024-11-09 10:50:01,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 432 transitions, 4634 flow [2024-11-09 10:50:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-09 10:50:01,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-09 10:50:01,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1128 transitions. [2024-11-09 10:50:01,489 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5186206896551724 [2024-11-09 10:50:01,489 INFO L175 Difference]: Start difference. First operand has 282 places, 275 transitions, 2925 flow. Second operand 29 states and 1128 transitions. [2024-11-09 10:50:01,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 432 transitions, 4634 flow [2024-11-09 10:50:01,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 432 transitions, 4439 flow, removed 13 selfloop flow, removed 18 redundant places. [2024-11-09 10:50:01,695 INFO L231 Difference]: Finished difference. Result has 298 places, 285 transitions, 3127 flow [2024-11-09 10:50:01,695 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2756, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3127, PETRI_PLACES=298, PETRI_TRANSITIONS=285} [2024-11-09 10:50:01,696 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 218 predicate places. [2024-11-09 10:50:01,696 INFO L471 AbstractCegarLoop]: Abstraction has has 298 places, 285 transitions, 3127 flow [2024-11-09 10:50:01,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:01,696 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:01,696 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:01,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-09 10:50:01,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 10:50:01,897 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:50:01,897 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:01,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1577053553, now seen corresponding path program 14 times [2024-11-09 10:50:01,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:01,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018338499] [2024-11-09 10:50:01,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:01,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:02,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:02,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:02,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018338499] [2024-11-09 10:50:02,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018338499] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:02,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813586458] [2024-11-09 10:50:02,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:50:02,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:02,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:02,667 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:02,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-09 10:50:02,747 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:50:02,747 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:02,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:50:02,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:02,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:02,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:50:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:02,940 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:50:02,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813586458] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:02,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:50:02,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 25 [2024-11-09 10:50:02,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073952057] [2024-11-09 10:50:02,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:02,940 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:50:02,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:02,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:50:02,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2024-11-09 10:50:03,280 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:50:03,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 285 transitions, 3127 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:03,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:03,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:50:03,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:04,828 INFO L124 PetriNetUnfolderBase]: 4476/7455 cut-off events. [2024-11-09 10:50:04,829 INFO L125 PetriNetUnfolderBase]: For 67108/67435 co-relation queries the response was YES. [2024-11-09 10:50:04,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40443 conditions, 7455 events. 4476/7455 cut-off events. For 67108/67435 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 47788 event pairs, 905 based on Foata normal form. 277/7621 useless extension candidates. Maximal degree in co-relation 40337. Up to 5093 conditions per place. [2024-11-09 10:50:05,012 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 230 selfloop transitions, 82 changer transitions 39/374 dead transitions. [2024-11-09 10:50:05,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 374 transitions, 4164 flow [2024-11-09 10:50:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 10:50:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-09 10:50:05,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 798 transitions. [2024-11-09 10:50:05,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.532 [2024-11-09 10:50:05,014 INFO L175 Difference]: Start difference. First operand has 298 places, 285 transitions, 3127 flow. Second operand 20 states and 798 transitions. [2024-11-09 10:50:05,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 374 transitions, 4164 flow [2024-11-09 10:50:05,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 374 transitions, 3956 flow, removed 42 selfloop flow, removed 20 redundant places. [2024-11-09 10:50:05,244 INFO L231 Difference]: Finished difference. Result has 292 places, 273 transitions, 2970 flow [2024-11-09 10:50:05,244 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2970, PETRI_PLACES=292, PETRI_TRANSITIONS=273} [2024-11-09 10:50:05,245 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 212 predicate places. [2024-11-09 10:50:05,245 INFO L471 AbstractCegarLoop]: Abstraction has has 292 places, 273 transitions, 2970 flow [2024-11-09 10:50:05,245 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:05,245 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:05,245 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:05,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-09 10:50:05,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-09 10:50:05,446 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:50:05,446 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:05,446 INFO L85 PathProgramCache]: Analyzing trace with hash 314327715, now seen corresponding path program 15 times [2024-11-09 10:50:05,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:05,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039494945] [2024-11-09 10:50:05,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:05,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:06,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:06,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039494945] [2024-11-09 10:50:06,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039494945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:06,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075295653] [2024-11-09 10:50:06,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:50:06,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:06,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:06,627 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:06,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-09 10:50:06,699 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-09 10:50:06,699 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:06,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:50:06,701 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:06,911 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:06,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:50:06,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:06,968 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:50:06,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075295653] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:06,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:50:06,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [19] total 28 [2024-11-09 10:50:06,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744798726] [2024-11-09 10:50:06,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:06,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:50:06,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:06,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:50:06,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2024-11-09 10:50:07,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:50:07,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 273 transitions, 2970 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:07,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:07,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:50:07,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:08,933 INFO L124 PetriNetUnfolderBase]: 4500/7490 cut-off events. [2024-11-09 10:50:08,933 INFO L125 PetriNetUnfolderBase]: For 58430/58751 co-relation queries the response was YES. [2024-11-09 10:50:08,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39428 conditions, 7490 events. 4500/7490 cut-off events. For 58430/58751 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 47893 event pairs, 905 based on Foata normal form. 275/7658 useless extension candidates. Maximal degree in co-relation 39277. Up to 5188 conditions per place. [2024-11-09 10:50:09,019 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 256 selfloop transitions, 89 changer transitions 27/395 dead transitions. [2024-11-09 10:50:09,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 395 transitions, 4242 flow [2024-11-09 10:50:09,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 10:50:09,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-09 10:50:09,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1015 transitions. [2024-11-09 10:50:09,021 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5205128205128206 [2024-11-09 10:50:09,021 INFO L175 Difference]: Start difference. First operand has 292 places, 273 transitions, 2970 flow. Second operand 26 states and 1015 transitions. [2024-11-09 10:50:09,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 395 transitions, 4242 flow [2024-11-09 10:50:09,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 395 transitions, 4014 flow, removed 9 selfloop flow, removed 20 redundant places. [2024-11-09 10:50:09,249 INFO L231 Difference]: Finished difference. Result has 288 places, 280 transitions, 3051 flow [2024-11-09 10:50:09,250 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2762, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3051, PETRI_PLACES=288, PETRI_TRANSITIONS=280} [2024-11-09 10:50:09,250 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 208 predicate places. [2024-11-09 10:50:09,250 INFO L471 AbstractCegarLoop]: Abstraction has has 288 places, 280 transitions, 3051 flow [2024-11-09 10:50:09,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:09,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:09,251 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:09,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-11-09 10:50:09,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:09,451 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:50:09,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:09,451 INFO L85 PathProgramCache]: Analyzing trace with hash -417033047, now seen corresponding path program 16 times [2024-11-09 10:50:09,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:09,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193639933] [2024-11-09 10:50:09,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:09,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:10,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:10,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193639933] [2024-11-09 10:50:10,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193639933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:10,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143948065] [2024-11-09 10:50:10,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:50:10,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:10,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:10,149 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:10,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-09 10:50:10,241 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:50:10,241 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:10,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:50:10,243 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:10,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:10,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:50:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:10,416 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:50:10,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143948065] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:10,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:50:10,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18] total 25 [2024-11-09 10:50:10,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924407439] [2024-11-09 10:50:10,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:10,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:50:10,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:10,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:50:10,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2024-11-09 10:50:10,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:50:10,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 280 transitions, 3051 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:10,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:10,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:50:10,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:12,282 INFO L124 PetriNetUnfolderBase]: 4439/7393 cut-off events. [2024-11-09 10:50:12,282 INFO L125 PetriNetUnfolderBase]: For 57711/58032 co-relation queries the response was YES. [2024-11-09 10:50:12,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39174 conditions, 7393 events. 4439/7393 cut-off events. For 57711/58032 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 47211 event pairs, 889 based on Foata normal form. 275/7561 useless extension candidates. Maximal degree in co-relation 39024. Up to 5091 conditions per place. [2024-11-09 10:50:12,346 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 251 selfloop transitions, 88 changer transitions 27/389 dead transitions. [2024-11-09 10:50:12,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 389 transitions, 4222 flow [2024-11-09 10:50:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-09 10:50:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-09 10:50:12,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 945 transitions. [2024-11-09 10:50:12,348 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-09 10:50:12,348 INFO L175 Difference]: Start difference. First operand has 288 places, 280 transitions, 3051 flow. Second operand 24 states and 945 transitions. [2024-11-09 10:50:12,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 389 transitions, 4222 flow [2024-11-09 10:50:12,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 389 transitions, 4058 flow, removed 13 selfloop flow, removed 18 redundant places. [2024-11-09 10:50:12,556 INFO L231 Difference]: Finished difference. Result has 294 places, 280 transitions, 3103 flow [2024-11-09 10:50:12,557 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2895, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3103, PETRI_PLACES=294, PETRI_TRANSITIONS=280} [2024-11-09 10:50:12,557 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 214 predicate places. [2024-11-09 10:50:12,557 INFO L471 AbstractCegarLoop]: Abstraction has has 294 places, 280 transitions, 3103 flow [2024-11-09 10:50:12,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:12,558 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:12,558 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:12,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-11-09 10:50:12,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:12,758 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:50:12,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:12,759 INFO L85 PathProgramCache]: Analyzing trace with hash -694230761, now seen corresponding path program 17 times [2024-11-09 10:50:12,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:12,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136012662] [2024-11-09 10:50:12,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:12,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:13,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:13,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136012662] [2024-11-09 10:50:13,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136012662] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:13,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787052440] [2024-11-09 10:50:13,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:50:13,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:13,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:13,962 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:13,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-09 10:50:14,036 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-09 10:50:14,036 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:14,037 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 10:50:14,038 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:14,230 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:14,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:50:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:14,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:14,430 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-09 10:50:14,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-09 10:50:14,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:14,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787052440] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:14,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:50:14,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [18, 13] total 32 [2024-11-09 10:50:14,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386448329] [2024-11-09 10:50:14,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:14,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:50:14,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:14,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:50:14,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2024-11-09 10:50:14,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:50:14,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 280 transitions, 3103 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:14,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:14,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:50:14,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:16,337 INFO L124 PetriNetUnfolderBase]: 4352/7259 cut-off events. [2024-11-09 10:50:16,337 INFO L125 PetriNetUnfolderBase]: For 58980/59301 co-relation queries the response was YES. [2024-11-09 10:50:16,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39119 conditions, 7259 events. 4352/7259 cut-off events. For 58980/59301 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 46339 event pairs, 883 based on Foata normal form. 275/7427 useless extension candidates. Maximal degree in co-relation 38964. Up to 4666 conditions per place. [2024-11-09 10:50:16,409 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 250 selfloop transitions, 82 changer transitions 35/390 dead transitions. [2024-11-09 10:50:16,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 390 transitions, 4244 flow [2024-11-09 10:50:16,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-09 10:50:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-09 10:50:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1009 transitions. [2024-11-09 10:50:16,411 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5174358974358975 [2024-11-09 10:50:16,411 INFO L175 Difference]: Start difference. First operand has 294 places, 280 transitions, 3103 flow. Second operand 26 states and 1009 transitions. [2024-11-09 10:50:16,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 390 transitions, 4244 flow [2024-11-09 10:50:16,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 390 transitions, 3984 flow, removed 16 selfloop flow, removed 19 redundant places. [2024-11-09 10:50:16,650 INFO L231 Difference]: Finished difference. Result has 297 places, 272 transitions, 2939 flow [2024-11-09 10:50:16,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2845, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2939, PETRI_PLACES=297, PETRI_TRANSITIONS=272} [2024-11-09 10:50:16,651 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 217 predicate places. [2024-11-09 10:50:16,651 INFO L471 AbstractCegarLoop]: Abstraction has has 297 places, 272 transitions, 2939 flow [2024-11-09 10:50:16,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:16,651 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:16,652 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:16,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-11-09 10:50:16,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-09 10:50:16,852 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:50:16,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:16,852 INFO L85 PathProgramCache]: Analyzing trace with hash 37130001, now seen corresponding path program 18 times [2024-11-09 10:50:16,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:16,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673603954] [2024-11-09 10:50:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:16,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:17,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:17,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673603954] [2024-11-09 10:50:17,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673603954] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:17,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632282283] [2024-11-09 10:50:17,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:50:17,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:17,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:17,924 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:17,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-09 10:50:18,068 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-09 10:50:18,068 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:18,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:50:18,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:18,264 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:18,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:50:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:18,306 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:50:18,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632282283] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:18,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:50:18,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [19] total 28 [2024-11-09 10:50:18,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480441380] [2024-11-09 10:50:18,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:18,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:50:18,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:18,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:50:18,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2024-11-09 10:50:18,578 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 75 [2024-11-09 10:50:18,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 272 transitions, 2939 flow. Second operand has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:18,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:18,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 75 [2024-11-09 10:50:18,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:20,045 INFO L124 PetriNetUnfolderBase]: 4226/7028 cut-off events. [2024-11-09 10:50:20,045 INFO L125 PetriNetUnfolderBase]: For 57143/57464 co-relation queries the response was YES. [2024-11-09 10:50:20,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37533 conditions, 7028 events. 4226/7028 cut-off events. For 57143/57464 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 44469 event pairs, 907 based on Foata normal form. 275/7196 useless extension candidates. Maximal degree in co-relation 37379. Up to 4956 conditions per place. [2024-11-09 10:50:20,116 INFO L140 encePairwiseOnDemand]: 56/75 looper letters, 215 selfloop transitions, 67 changer transitions 55/360 dead transitions. [2024-11-09 10:50:20,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 360 transitions, 3939 flow [2024-11-09 10:50:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 10:50:20,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-09 10:50:20,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 827 transitions. [2024-11-09 10:50:20,118 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525079365079365 [2024-11-09 10:50:20,118 INFO L175 Difference]: Start difference. First operand has 297 places, 272 transitions, 2939 flow. Second operand 21 states and 827 transitions. [2024-11-09 10:50:20,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 360 transitions, 3939 flow [2024-11-09 10:50:20,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 360 transitions, 3744 flow, removed 9 selfloop flow, removed 27 redundant places. [2024-11-09 10:50:20,437 INFO L231 Difference]: Finished difference. Result has 283 places, 255 transitions, 2738 flow [2024-11-09 10:50:20,437 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2738, PETRI_PLACES=283, PETRI_TRANSITIONS=255} [2024-11-09 10:50:20,438 INFO L277 CegarLoopForPetriNet]: 80 programPoint places, 203 predicate places. [2024-11-09 10:50:20,438 INFO L471 AbstractCegarLoop]: Abstraction has has 283 places, 255 transitions, 2738 flow [2024-11-09 10:50:20,438 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.5) internal successors, (414), 12 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:20,438 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:20,439 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:20,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-11-09 10:50:20,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-11-09 10:50:20,639 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2024-11-09 10:50:20,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:20,640 INFO L85 PathProgramCache]: Analyzing trace with hash 806796969, now seen corresponding path program 19 times [2024-11-09 10:50:20,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:20,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821581026] [2024-11-09 10:50:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:20,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:20,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:21,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:21,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821581026] [2024-11-09 10:50:21,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821581026] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:21,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450611591] [2024-11-09 10:50:21,683 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:50:21,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:21,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:21,684 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:21,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-09 10:50:21,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:21,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 10:50:21,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:22,012 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:22,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-09 10:50:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:22,017 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:22,219 INFO L349 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2024-11-09 10:50:22,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2024-11-09 10:50:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:22,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450611591] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:22,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:50:22,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [19, 13] total 34 [2024-11-09 10:50:22,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861352739] [2024-11-09 10:50:22,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:22,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:50:22,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:22,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:50:22,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1044, Unknown=0, NotChecked=0, Total=1122