./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-sorted.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 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:50:03,280 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:50:03,354 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:50:03,358 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:50:03,359 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:50:03,383 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:50:03,384 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:50:03,384 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:50:03,384 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:50:03,385 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:50:03,385 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:50:03,386 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:50:03,386 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:50:03,386 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:50:03,387 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:50:03,387 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:50:03,387 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:50:03,388 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:50:03,388 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:50:03,388 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:50:03,389 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:50:03,389 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:50:03,390 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:50:03,390 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:50:03,393 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:50:03,393 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:50:03,393 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:50:03,393 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:50:03,394 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:50:03,394 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:50:03,394 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:50:03,394 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:50:03,395 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:50:03,395 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:50:03,395 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:50:03,395 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:50:03,396 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:50:03,396 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:50:03,400 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:50:03,401 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:50:03,401 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:50:03,402 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:50:03,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 39e987e3198040ef6af9e29359b0ab7bee89306d1945f6e4e7a9286ebbe2a705 [2024-11-22 21:50:03,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:50:03,664 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:50:03,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:50:03,668 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:50:03,669 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:50:03,670 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2024-11-22 21:50:05,094 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:50:05,293 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:50:05,294 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-sorted.wvr.c [2024-11-22 21:50:05,302 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84adb7a0d/5a0800e762074a8da0e04c8cfb6047dc/FLAGa50ec76e8 [2024-11-22 21:50:05,314 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84adb7a0d/5a0800e762074a8da0e04c8cfb6047dc [2024-11-22 21:50:05,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:50:05,318 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:50:05,320 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:50:05,320 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:50:05,325 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:50:05,326 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,329 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3973240f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05, skipping insertion in model container [2024-11-22 21:50:05,329 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,349 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:50:05,558 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:50:05,562 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:50:05,571 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:50:05,593 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:50:05,611 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:50:05,611 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05 WrapperNode [2024-11-22 21:50:05,611 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:50:05,612 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:50:05,612 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:50:05,613 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:50:05,618 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,628 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,646 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 92 [2024-11-22 21:50:05,647 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:50:05,648 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:50:05,648 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:50:05,648 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:50:05,658 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,662 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,677 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-22 21:50:05,678 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,678 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,700 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,705 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,707 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,708 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,711 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:50:05,712 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:50:05,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:50:05,713 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:50:05,714 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (1/1) ... [2024-11-22 21:50:05,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:50:05,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:05,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:50:05,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:50:05,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:50:05,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:50:05,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:50:05,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:50:05,829 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:50:05,829 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:50:05,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:50:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:50:05,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:50:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:50:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:50:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:50:05,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:50:05,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:50:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:50:05,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:50:05,838 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:50:05,968 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:50:05,971 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:50:06,271 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:50:06,272 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:50:06,488 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:50:06,488 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 21:50:06,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:50:06 BoogieIcfgContainer [2024-11-22 21:50:06,489 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:50:06,491 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:50:06,492 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:50:06,495 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:50:06,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:50:05" (1/3) ... [2024-11-22 21:50:06,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3380b21e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:50:06, skipping insertion in model container [2024-11-22 21:50:06,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:50:05" (2/3) ... [2024-11-22 21:50:06,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3380b21e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:50:06, skipping insertion in model container [2024-11-22 21:50:06,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:50:06" (3/3) ... [2024-11-22 21:50:06,498 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2024-11-22 21:50:06,513 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:50:06,513 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-22 21:50:06,514 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:50:06,591 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:50:06,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 59 transitions, 139 flow [2024-11-22 21:50:06,664 INFO L124 PetriNetUnfolderBase]: 7/56 cut-off events. [2024-11-22 21:50:06,664 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:50:06,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 56 events. 7/56 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 140 event pairs, 0 based on Foata normal form. 0/33 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-11-22 21:50:06,668 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 59 transitions, 139 flow [2024-11-22 21:50:06,673 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 55 transitions, 128 flow [2024-11-22 21:50:06,681 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:50:06,687 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;@3dcd8b58, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:50:06,687 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-22 21:50:06,690 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:50:06,691 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:50:06,691 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:50:06,691 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:06,692 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:50:06,692 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:06,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:06,697 INFO L85 PathProgramCache]: Analyzing trace with hash 461494, now seen corresponding path program 1 times [2024-11-22 21:50:06,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:06,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091121649] [2024-11-22 21:50:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:06,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:06,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:06,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:06,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091121649] [2024-11-22 21:50:06,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091121649] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:50:06,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:50:06,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:50:06,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088677549] [2024-11-22 21:50:06,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:06,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:50:06,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:07,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:50:07,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:50:07,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-22 21:50:07,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:07,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:07,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-22 21:50:07,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:07,408 INFO L124 PetriNetUnfolderBase]: 785/1534 cut-off events. [2024-11-22 21:50:07,408 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-11-22 21:50:07,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2678 conditions, 1534 events. 785/1534 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9339 event pairs, 464 based on Foata normal form. 1/1061 useless extension candidates. Maximal degree in co-relation 2447. Up to 1061 conditions per place. [2024-11-22 21:50:07,429 INFO L140 encePairwiseOnDemand]: 55/59 looper letters, 27 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2024-11-22 21:50:07,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 180 flow [2024-11-22 21:50:07,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:50:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:50:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-11-22 21:50:07,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.632768361581921 [2024-11-22 21:50:07,444 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 128 flow. Second operand 3 states and 112 transitions. [2024-11-22 21:50:07,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 180 flow [2024-11-22 21:50:07,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 168 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:50:07,455 INFO L231 Difference]: Finished difference. Result has 51 places, 52 transitions, 114 flow [2024-11-22 21:50:07,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=51, PETRI_TRANSITIONS=52} [2024-11-22 21:50:07,462 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2024-11-22 21:50:07,462 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 52 transitions, 114 flow [2024-11-22 21:50:07,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:07,463 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:07,463 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:50:07,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:50:07,464 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:07,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:07,465 INFO L85 PathProgramCache]: Analyzing trace with hash 461495, now seen corresponding path program 1 times [2024-11-22 21:50:07,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:07,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402982690] [2024-11-22 21:50:07,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:07,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:07,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:07,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402982690] [2024-11-22 21:50:07,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402982690] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:50:07,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:50:07,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:50:07,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251078017] [2024-11-22 21:50:07,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:07,804 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:50:07,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:07,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:50:07,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:50:07,847 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 59 [2024-11-22 21:50:07,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:07,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:07,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 59 [2024-11-22 21:50:07,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:08,093 INFO L124 PetriNetUnfolderBase]: 785/1533 cut-off events. [2024-11-22 21:50:08,094 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-22 21:50:08,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2626 conditions, 1533 events. 785/1533 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 9338 event pairs, 464 based on Foata normal form. 0/1060 useless extension candidates. Maximal degree in co-relation 2613. Up to 1061 conditions per place. [2024-11-22 21:50:08,107 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 25 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2024-11-22 21:50:08,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 170 flow [2024-11-22 21:50:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:50:08,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:50:08,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 138 transitions. [2024-11-22 21:50:08,111 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5847457627118644 [2024-11-22 21:50:08,111 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 114 flow. Second operand 4 states and 138 transitions. [2024-11-22 21:50:08,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 170 flow [2024-11-22 21:50:08,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:50:08,113 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 116 flow [2024-11-22 21:50:08,114 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-11-22 21:50:08,115 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2024-11-22 21:50:08,115 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 116 flow [2024-11-22 21:50:08,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:08,116 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:08,116 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:08,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:50:08,116 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:08,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:08,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1105075391, now seen corresponding path program 1 times [2024-11-22 21:50:08,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:08,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928304472] [2024-11-22 21:50:08,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:08,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:08,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:08,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:08,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928304472] [2024-11-22 21:50:08,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928304472] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:50:08,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:50:08,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:50:08,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97737261] [2024-11-22 21:50:08,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:08,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:50:08,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:08,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:50:08,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:50:08,274 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 59 [2024-11-22 21:50:08,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:08,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:08,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 59 [2024-11-22 21:50:08,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:08,546 INFO L124 PetriNetUnfolderBase]: 1354/2149 cut-off events. [2024-11-22 21:50:08,546 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-22 21:50:08,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4033 conditions, 2149 events. 1354/2149 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10708 event pairs, 878 based on Foata normal form. 0/1813 useless extension candidates. Maximal degree in co-relation 4018. Up to 1837 conditions per place. [2024-11-22 21:50:08,559 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 30 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-11-22 21:50:08,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 168 flow [2024-11-22 21:50:08,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:50:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:50:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-11-22 21:50:08,562 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4661016949152542 [2024-11-22 21:50:08,563 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 116 flow. Second operand 4 states and 110 transitions. [2024-11-22 21:50:08,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 168 flow [2024-11-22 21:50:08,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 45 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:50:08,564 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 100 flow [2024-11-22 21:50:08,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2024-11-22 21:50:08,565 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -13 predicate places. [2024-11-22 21:50:08,566 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 100 flow [2024-11-22 21:50:08,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:08,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:08,566 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:08,567 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-22 21:50:08,567 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:08,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1105075392, now seen corresponding path program 1 times [2024-11-22 21:50:08,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:08,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577418657] [2024-11-22 21:50:08,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:08,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:08,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:08,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577418657] [2024-11-22 21:50:08,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577418657] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:50:08,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:50:08,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:50:08,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421419174] [2024-11-22 21:50:08,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:08,660 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:50:08,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:08,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:50:08,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:50:08,665 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:50:08,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:08,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:08,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:50:08,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:08,806 INFO L124 PetriNetUnfolderBase]: 785/1401 cut-off events. [2024-11-22 21:50:08,806 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-22 21:50:08,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2496 conditions, 1401 events. 785/1401 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 7553 event pairs, 464 based on Foata normal form. 1/1063 useless extension candidates. Maximal degree in co-relation 2479. Up to 1064 conditions per place. [2024-11-22 21:50:08,815 INFO L140 encePairwiseOnDemand]: 56/59 looper letters, 29 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-22 21:50:08,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 47 transitions, 166 flow [2024-11-22 21:50:08,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:50:08,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:50:08,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 116 transitions. [2024-11-22 21:50:08,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.655367231638418 [2024-11-22 21:50:08,817 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 100 flow. Second operand 3 states and 116 transitions. [2024-11-22 21:50:08,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 47 transitions, 166 flow [2024-11-22 21:50:08,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 163 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:50:08,822 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 109 flow [2024-11-22 21:50:08,822 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=109, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-22 21:50:08,824 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -12 predicate places. [2024-11-22 21:50:08,824 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 109 flow [2024-11-22 21:50:08,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:08,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:08,825 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:08,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:50:08,826 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:08,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:08,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1722261210, now seen corresponding path program 1 times [2024-11-22 21:50:08,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:08,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483702945] [2024-11-22 21:50:08,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:08,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:08,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:08,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:08,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483702945] [2024-11-22 21:50:08,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483702945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:08,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744074696] [2024-11-22 21:50:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:08,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:08,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:08,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:08,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:50:09,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:09,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 21:50:09,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:09,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:09,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744074696] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:09,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:09,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-22 21:50:09,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684094795] [2024-11-22 21:50:09,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:09,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:50:09,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:09,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:50:09,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:50:09,216 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:50:09,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 109 flow. Second operand has 12 states, 12 states have (on average 29.583333333333332) internal successors, (355), 12 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:09,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:09,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:50:09,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:09,564 INFO L124 PetriNetUnfolderBase]: 1237/2179 cut-off events. [2024-11-22 21:50:09,564 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-11-22 21:50:09,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3946 conditions, 2179 events. 1237/2179 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 12606 event pairs, 645 based on Foata normal form. 0/1719 useless extension candidates. Maximal degree in co-relation 3933. Up to 1063 conditions per place. [2024-11-22 21:50:09,582 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 63 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-11-22 21:50:09,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 87 transitions, 346 flow [2024-11-22 21:50:09,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:50:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:50:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 268 transitions. [2024-11-22 21:50:09,585 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.648910411622276 [2024-11-22 21:50:09,586 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 109 flow. Second operand 7 states and 268 transitions. [2024-11-22 21:50:09,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 87 transitions, 346 flow [2024-11-22 21:50:09,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 87 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:50:09,588 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 160 flow [2024-11-22 21:50:09,588 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=160, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-11-22 21:50:09,589 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2024-11-22 21:50:09,589 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 160 flow [2024-11-22 21:50:09,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.583333333333332) internal successors, (355), 12 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:09,590 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:09,590 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:09,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:50:09,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:09,793 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:09,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:09,794 INFO L85 PathProgramCache]: Analyzing trace with hash -78437364, now seen corresponding path program 2 times [2024-11-22 21:50:09,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:09,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587854455] [2024-11-22 21:50:09,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:50:09,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:09,815 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:50:09,815 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:50:10,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:10,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587854455] [2024-11-22 21:50:10,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587854455] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:50:10,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:50:10,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:50:10,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709044106] [2024-11-22 21:50:10,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:10,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:50:10,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:10,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:50:10,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:50:10,224 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-22 21:50:10,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 160 flow. Second operand has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:10,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:10,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-22 21:50:10,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:10,642 INFO L124 PetriNetUnfolderBase]: 1985/3347 cut-off events. [2024-11-22 21:50:10,643 INFO L125 PetriNetUnfolderBase]: For 329/329 co-relation queries the response was YES. [2024-11-22 21:50:10,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6619 conditions, 3347 events. 1985/3347 cut-off events. For 329/329 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 19746 event pairs, 834 based on Foata normal form. 62/2663 useless extension candidates. Maximal degree in co-relation 4920. Up to 1951 conditions per place. [2024-11-22 21:50:10,662 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 62 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2024-11-22 21:50:10,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 85 transitions, 378 flow [2024-11-22 21:50:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:50:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:50:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-11-22 21:50:10,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6299435028248588 [2024-11-22 21:50:10,664 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 160 flow. Second operand 6 states and 223 transitions. [2024-11-22 21:50:10,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 85 transitions, 378 flow [2024-11-22 21:50:10,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 370 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-22 21:50:10,671 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 197 flow [2024-11-22 21:50:10,671 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2024-11-22 21:50:10,672 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2024-11-22 21:50:10,672 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 197 flow [2024-11-22 21:50:10,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.333333333333332) internal successors, (164), 6 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:10,672 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:10,672 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:10,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:50:10,673 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:10,673 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:10,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1668852911, now seen corresponding path program 1 times [2024-11-22 21:50:10,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:10,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139884426] [2024-11-22 21:50:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:10,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:10,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:10,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:10,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139884426] [2024-11-22 21:50:10,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139884426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:10,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354954960] [2024-11-22 21:50:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:10,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:10,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:10,794 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:10,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:50:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:10,857 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:50:10,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:10,915 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:10,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354954960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:10,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:10,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-22 21:50:10,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351134709] [2024-11-22 21:50:10,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:10,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:50:10,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:10,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:50:10,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:50:11,029 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:50:11,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 197 flow. Second operand has 13 states, 13 states have (on average 29.846153846153847) internal successors, (388), 13 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:11,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:11,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:50:11,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:11,387 INFO L124 PetriNetUnfolderBase]: 1473/2669 cut-off events. [2024-11-22 21:50:11,387 INFO L125 PetriNetUnfolderBase]: For 1572/1578 co-relation queries the response was YES. [2024-11-22 21:50:11,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5921 conditions, 2669 events. 1473/2669 cut-off events. For 1572/1578 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16445 event pairs, 799 based on Foata normal form. 0/2125 useless extension candidates. Maximal degree in co-relation 4871. Up to 1660 conditions per place. [2024-11-22 21:50:11,409 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 59 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2024-11-22 21:50:11,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 413 flow [2024-11-22 21:50:11,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:50:11,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:50:11,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 261 transitions. [2024-11-22 21:50:11,431 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6319612590799032 [2024-11-22 21:50:11,431 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 197 flow. Second operand 7 states and 261 transitions. [2024-11-22 21:50:11,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 413 flow [2024-11-22 21:50:11,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 83 transitions, 396 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-22 21:50:11,438 INFO L231 Difference]: Finished difference. Result has 66 places, 56 transitions, 213 flow [2024-11-22 21:50:11,438 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=213, PETRI_PLACES=66, PETRI_TRANSITIONS=56} [2024-11-22 21:50:11,439 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 8 predicate places. [2024-11-22 21:50:11,439 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 56 transitions, 213 flow [2024-11-22 21:50:11,440 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 29.846153846153847) internal successors, (388), 13 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:11,440 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:11,440 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:11,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:50:11,640 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,SelfDestructingSolverStorable6 [2024-11-22 21:50:11,641 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:11,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:11,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1792865463, now seen corresponding path program 2 times [2024-11-22 21:50:11,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:11,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147072236] [2024-11-22 21:50:11,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:50:11,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:11,660 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:50:11,660 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:50:11,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:11,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147072236] [2024-11-22 21:50:11,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147072236] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:50:11,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:50:11,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:50:11,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239341383] [2024-11-22 21:50:11,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:11,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:50:11,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:11,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:50:11,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:50:11,980 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-22 21:50:11,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 56 transitions, 213 flow. Second operand has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:11,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:11,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-22 21:50:11,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:12,503 INFO L124 PetriNetUnfolderBase]: 2817/4660 cut-off events. [2024-11-22 21:50:12,503 INFO L125 PetriNetUnfolderBase]: For 2235/2307 co-relation queries the response was YES. [2024-11-22 21:50:12,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10593 conditions, 4660 events. 2817/4660 cut-off events. For 2235/2307 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 28269 event pairs, 1151 based on Foata normal form. 101/3877 useless extension candidates. Maximal degree in co-relation 9419. Up to 2709 conditions per place. [2024-11-22 21:50:12,539 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 73 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2024-11-22 21:50:12,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 521 flow [2024-11-22 21:50:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:50:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:50:12,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 221 transitions. [2024-11-22 21:50:12,541 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6242937853107344 [2024-11-22 21:50:12,541 INFO L175 Difference]: Start difference. First operand has 66 places, 56 transitions, 213 flow. Second operand 6 states and 221 transitions. [2024-11-22 21:50:12,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 521 flow [2024-11-22 21:50:12,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 96 transitions, 510 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:50:12,611 INFO L231 Difference]: Finished difference. Result has 69 places, 59 transitions, 247 flow [2024-11-22 21:50:12,612 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=247, PETRI_PLACES=69, PETRI_TRANSITIONS=59} [2024-11-22 21:50:12,612 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 11 predicate places. [2024-11-22 21:50:12,613 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 59 transitions, 247 flow [2024-11-22 21:50:12,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.666666666666668) internal successors, (166), 6 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:12,613 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:12,613 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:12,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:50:12,613 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:12,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:12,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1772806024, now seen corresponding path program 1 times [2024-11-22 21:50:12,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:12,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400771989] [2024-11-22 21:50:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:12,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:12,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:12,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400771989] [2024-11-22 21:50:12,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400771989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:12,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544989634] [2024-11-22 21:50:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:12,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:12,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:12,713 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:12,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:50:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:12,779 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:50:12,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:12,878 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:12,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544989634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:12,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:12,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-22 21:50:12,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161475508] [2024-11-22 21:50:12,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:12,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:50:12,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:50:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:50:12,982 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:50:12,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 59 transitions, 247 flow. Second operand has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:12,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:12,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:50:12,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:13,491 INFO L124 PetriNetUnfolderBase]: 2175/3908 cut-off events. [2024-11-22 21:50:13,492 INFO L125 PetriNetUnfolderBase]: For 3490/3602 co-relation queries the response was YES. [2024-11-22 21:50:13,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9784 conditions, 3908 events. 2175/3908 cut-off events. For 3490/3602 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25455 event pairs, 1205 based on Foata normal form. 0/3232 useless extension candidates. Maximal degree in co-relation 8946. Up to 2675 conditions per place. [2024-11-22 21:50:13,525 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 55 selfloop transitions, 8 changer transitions 0/79 dead transitions. [2024-11-22 21:50:13,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 79 transitions, 449 flow [2024-11-22 21:50:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:50:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:50:13,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 254 transitions. [2024-11-22 21:50:13,526 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6150121065375302 [2024-11-22 21:50:13,527 INFO L175 Difference]: Start difference. First operand has 69 places, 59 transitions, 247 flow. Second operand 7 states and 254 transitions. [2024-11-22 21:50:13,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 79 transitions, 449 flow [2024-11-22 21:50:13,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 79 transitions, 432 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-22 21:50:13,537 INFO L231 Difference]: Finished difference. Result has 74 places, 61 transitions, 263 flow [2024-11-22 21:50:13,538 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=263, PETRI_PLACES=74, PETRI_TRANSITIONS=61} [2024-11-22 21:50:13,539 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 16 predicate places. [2024-11-22 21:50:13,539 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 61 transitions, 263 flow [2024-11-22 21:50:13,539 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 30.166666666666668) internal successors, (362), 12 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:13,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:13,540 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:13,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:50:13,740 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:13,741 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:13,741 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:13,741 INFO L85 PathProgramCache]: Analyzing trace with hash -263890747, now seen corresponding path program 1 times [2024-11-22 21:50:13,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:13,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82854451] [2024-11-22 21:50:13,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:13,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:13,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:13,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:13,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82854451] [2024-11-22 21:50:13,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82854451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:13,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773724037] [2024-11-22 21:50:13,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:13,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:13,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:13,875 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:13,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:50:13,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:13,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:50:13,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:14,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:14,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773724037] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:14,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:14,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-22 21:50:14,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376292969] [2024-11-22 21:50:14,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:14,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:50:14,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:14,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:50:14,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:50:14,233 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:50:14,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 61 transitions, 263 flow. Second operand has 17 states, 17 states have (on average 29.764705882352942) internal successors, (506), 17 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:14,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:14,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:50:14,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:15,110 INFO L124 PetriNetUnfolderBase]: 3676/6476 cut-off events. [2024-11-22 21:50:15,110 INFO L125 PetriNetUnfolderBase]: For 4780/4934 co-relation queries the response was YES. [2024-11-22 21:50:15,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16289 conditions, 6476 events. 3676/6476 cut-off events. For 4780/4934 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 44880 event pairs, 1489 based on Foata normal form. 0/5451 useless extension candidates. Maximal degree in co-relation 8903. Up to 2675 conditions per place. [2024-11-22 21:50:15,152 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 104 selfloop transitions, 14 changer transitions 0/134 dead transitions. [2024-11-22 21:50:15,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 134 transitions, 794 flow [2024-11-22 21:50:15,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:50:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:50:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 346 transitions. [2024-11-22 21:50:15,154 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6516007532956686 [2024-11-22 21:50:15,154 INFO L175 Difference]: Start difference. First operand has 74 places, 61 transitions, 263 flow. Second operand 9 states and 346 transitions. [2024-11-22 21:50:15,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 134 transitions, 794 flow [2024-11-22 21:50:15,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 134 transitions, 779 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:50:15,173 INFO L231 Difference]: Finished difference. Result has 83 places, 68 transitions, 352 flow [2024-11-22 21:50:15,173 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=352, PETRI_PLACES=83, PETRI_TRANSITIONS=68} [2024-11-22 21:50:15,174 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 25 predicate places. [2024-11-22 21:50:15,174 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 68 transitions, 352 flow [2024-11-22 21:50:15,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 29.764705882352942) internal successors, (506), 17 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:15,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:15,175 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:15,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-22 21:50:15,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:15,381 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:15,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:15,381 INFO L85 PathProgramCache]: Analyzing trace with hash -115490962, now seen corresponding path program 2 times [2024-11-22 21:50:15,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:15,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325105257] [2024-11-22 21:50:15,382 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:50:15,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:15,395 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:50:15,396 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:50:15,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:15,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325105257] [2024-11-22 21:50:15,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325105257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:50:15,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:50:15,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:50:15,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773061966] [2024-11-22 21:50:15,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:15,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:50:15,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:15,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:50:15,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:50:15,769 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 59 [2024-11-22 21:50:15,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 68 transitions, 352 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:15,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:15,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 59 [2024-11-22 21:50:15,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:16,598 INFO L124 PetriNetUnfolderBase]: 4344/6970 cut-off events. [2024-11-22 21:50:16,598 INFO L125 PetriNetUnfolderBase]: For 10040/10190 co-relation queries the response was YES. [2024-11-22 21:50:16,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19781 conditions, 6970 events. 4344/6970 cut-off events. For 10040/10190 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 43714 event pairs, 972 based on Foata normal form. 0/5989 useless extension candidates. Maximal degree in co-relation 14643. Up to 2281 conditions per place. [2024-11-22 21:50:16,647 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 93 selfloop transitions, 10 changer transitions 0/116 dead transitions. [2024-11-22 21:50:16,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 116 transitions, 854 flow [2024-11-22 21:50:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:50:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:50:16,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 208 transitions. [2024-11-22 21:50:16,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5875706214689266 [2024-11-22 21:50:16,649 INFO L175 Difference]: Start difference. First operand has 83 places, 68 transitions, 352 flow. Second operand 6 states and 208 transitions. [2024-11-22 21:50:16,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 116 transitions, 854 flow [2024-11-22 21:50:16,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 833 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-22 21:50:16,667 INFO L231 Difference]: Finished difference. Result has 84 places, 66 transitions, 355 flow [2024-11-22 21:50:16,667 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=84, PETRI_TRANSITIONS=66} [2024-11-22 21:50:16,668 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 26 predicate places. [2024-11-22 21:50:16,668 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 66 transitions, 355 flow [2024-11-22 21:50:16,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:16,668 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:16,668 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:16,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:50:16,669 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:16,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:16,669 INFO L85 PathProgramCache]: Analyzing trace with hash -956861754, now seen corresponding path program 1 times [2024-11-22 21:50:16,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:16,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630872403] [2024-11-22 21:50:16,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:16,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:16,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:16,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630872403] [2024-11-22 21:50:16,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630872403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:16,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88292792] [2024-11-22 21:50:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:16,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:16,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:16,775 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:16,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:50:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:16,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:50:16,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:17,045 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:17,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88292792] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:17,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:17,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-22 21:50:17,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479011032] [2024-11-22 21:50:17,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:17,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:50:17,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:50:17,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:50:17,234 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:50:17,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 66 transitions, 355 flow. Second operand has 18 states, 18 states have (on average 29.944444444444443) internal successors, (539), 18 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:17,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:17,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:50:17,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:18,043 INFO L124 PetriNetUnfolderBase]: 3251/5495 cut-off events. [2024-11-22 21:50:18,043 INFO L125 PetriNetUnfolderBase]: For 7847/7959 co-relation queries the response was YES. [2024-11-22 21:50:18,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16171 conditions, 5495 events. 3251/5495 cut-off events. For 7847/7959 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 34788 event pairs, 1409 based on Foata normal form. 0/4752 useless extension candidates. Maximal degree in co-relation 12087. Up to 2672 conditions per place. [2024-11-22 21:50:18,076 INFO L140 encePairwiseOnDemand]: 51/59 looper letters, 96 selfloop transitions, 14 changer transitions 0/124 dead transitions. [2024-11-22 21:50:18,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 865 flow [2024-11-22 21:50:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:50:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:50:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 344 transitions. [2024-11-22 21:50:18,078 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.647834274952919 [2024-11-22 21:50:18,078 INFO L175 Difference]: Start difference. First operand has 84 places, 66 transitions, 355 flow. Second operand 9 states and 344 transitions. [2024-11-22 21:50:18,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 865 flow [2024-11-22 21:50:18,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 124 transitions, 817 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:50:18,095 INFO L231 Difference]: Finished difference. Result has 90 places, 70 transitions, 407 flow [2024-11-22 21:50:18,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=407, PETRI_PLACES=90, PETRI_TRANSITIONS=70} [2024-11-22 21:50:18,096 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 32 predicate places. [2024-11-22 21:50:18,096 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 70 transitions, 407 flow [2024-11-22 21:50:18,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.944444444444443) internal successors, (539), 18 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:18,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:18,097 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:18,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:50:18,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-22 21:50:18,301 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:18,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:18,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1328444831, now seen corresponding path program 2 times [2024-11-22 21:50:18,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:18,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424298579] [2024-11-22 21:50:18,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:50:18,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:18,324 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:50:18,324 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:50:18,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:18,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424298579] [2024-11-22 21:50:18,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424298579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:18,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038994644] [2024-11-22 21:50:18,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:50:18,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:18,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:18,550 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:18,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:50:18,618 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:50:18,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:18,619 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-22 21:50:18,620 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:18,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:50:19,022 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:50:19,022 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:50:19,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038994644] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:19,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:19,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:50:19,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376387170] [2024-11-22 21:50:19,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:19,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:50:19,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:19,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:50:19,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:50:19,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-11-22 21:50:19,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 70 transitions, 407 flow. Second operand has 17 states, 17 states have (on average 24.764705882352942) internal successors, (421), 17 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:19,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:19,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-11-22 21:50:19,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:21,479 INFO L124 PetriNetUnfolderBase]: 7599/11151 cut-off events. [2024-11-22 21:50:21,479 INFO L125 PetriNetUnfolderBase]: For 17459/17542 co-relation queries the response was YES. [2024-11-22 21:50:21,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34158 conditions, 11151 events. 7599/11151 cut-off events. For 17459/17542 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 64189 event pairs, 877 based on Foata normal form. 284/10151 useless extension candidates. Maximal degree in co-relation 23691. Up to 3087 conditions per place. [2024-11-22 21:50:21,565 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 189 selfloop transitions, 25 changer transitions 0/223 dead transitions. [2024-11-22 21:50:21,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 223 transitions, 1576 flow [2024-11-22 21:50:21,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:50:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:50:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 379 transitions. [2024-11-22 21:50:21,567 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6423728813559322 [2024-11-22 21:50:21,567 INFO L175 Difference]: Start difference. First operand has 90 places, 70 transitions, 407 flow. Second operand 10 states and 379 transitions. [2024-11-22 21:50:21,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 223 transitions, 1576 flow [2024-11-22 21:50:21,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 223 transitions, 1538 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-22 21:50:21,651 INFO L231 Difference]: Finished difference. Result has 93 places, 77 transitions, 498 flow [2024-11-22 21:50:21,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=498, PETRI_PLACES=93, PETRI_TRANSITIONS=77} [2024-11-22 21:50:21,652 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 35 predicate places. [2024-11-22 21:50:21,652 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 77 transitions, 498 flow [2024-11-22 21:50:21,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 24.764705882352942) internal successors, (421), 17 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:21,652 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:21,652 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:21,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:50:21,853 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:21,853 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:21,853 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:21,854 INFO L85 PathProgramCache]: Analyzing trace with hash 269271328, now seen corresponding path program 2 times [2024-11-22 21:50:21,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:21,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530171987] [2024-11-22 21:50:21,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:50:21,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:21,878 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:50:21,879 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:21,952 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:50:21,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:21,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530171987] [2024-11-22 21:50:21,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530171987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:50:21,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:50:21,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:50:21,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942479674] [2024-11-22 21:50:21,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:21,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:50:21,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:50:21,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:50:21,956 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-22 21:50:21,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 77 transitions, 498 flow. Second operand has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:21,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:21,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-22 21:50:21,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:23,305 INFO L124 PetriNetUnfolderBase]: 10869/15947 cut-off events. [2024-11-22 21:50:23,305 INFO L125 PetriNetUnfolderBase]: For 37323/37505 co-relation queries the response was YES. [2024-11-22 21:50:23,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55410 conditions, 15947 events. 10869/15947 cut-off events. For 37323/37505 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 95683 event pairs, 4329 based on Foata normal form. 8/13683 useless extension candidates. Maximal degree in co-relation 38732. Up to 9069 conditions per place. [2024-11-22 21:50:23,430 INFO L140 encePairwiseOnDemand]: 53/59 looper letters, 142 selfloop transitions, 10 changer transitions 0/164 dead transitions. [2024-11-22 21:50:23,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 164 transitions, 1360 flow [2024-11-22 21:50:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:50:23,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:50:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 212 transitions. [2024-11-22 21:50:23,431 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7186440677966102 [2024-11-22 21:50:23,432 INFO L175 Difference]: Start difference. First operand has 93 places, 77 transitions, 498 flow. Second operand 5 states and 212 transitions. [2024-11-22 21:50:23,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 164 transitions, 1360 flow [2024-11-22 21:50:23,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 164 transitions, 1170 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-11-22 21:50:23,540 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 520 flow [2024-11-22 21:50:23,541 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=520, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2024-11-22 21:50:23,541 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 37 predicate places. [2024-11-22 21:50:23,541 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 520 flow [2024-11-22 21:50:23,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.25) internal successors, (117), 4 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:23,542 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:23,542 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:23,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 21:50:23,542 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:23,543 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:23,543 INFO L85 PathProgramCache]: Analyzing trace with hash 107710917, now seen corresponding path program 1 times [2024-11-22 21:50:23,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:23,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588851110] [2024-11-22 21:50:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:23,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:23,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:23,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:23,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588851110] [2024-11-22 21:50:23,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588851110] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:23,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952439306] [2024-11-22 21:50:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:23,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:23,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:23,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:23,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:50:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:23,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:50:23,903 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-22 21:50:24,015 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:50:24,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952439306] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:50:24,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:50:24,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2024-11-22 21:50:24,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698368304] [2024-11-22 21:50:24,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:24,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:50:24,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:24,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:50:24,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:50:24,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 59 [2024-11-22 21:50:24,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 520 flow. Second operand has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:24,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:24,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 59 [2024-11-22 21:50:24,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:25,444 INFO L124 PetriNetUnfolderBase]: 8765/13526 cut-off events. [2024-11-22 21:50:25,444 INFO L125 PetriNetUnfolderBase]: For 23403/23565 co-relation queries the response was YES. [2024-11-22 21:50:25,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45507 conditions, 13526 events. 8765/13526 cut-off events. For 23403/23565 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 86559 event pairs, 1508 based on Foata normal form. 202/12599 useless extension candidates. Maximal degree in co-relation 31165. Up to 4307 conditions per place. [2024-11-22 21:50:25,532 INFO L140 encePairwiseOnDemand]: 52/59 looper letters, 158 selfloop transitions, 22 changer transitions 0/193 dead transitions. [2024-11-22 21:50:25,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 193 transitions, 1453 flow [2024-11-22 21:50:25,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:50:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:50:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 301 transitions. [2024-11-22 21:50:25,534 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6377118644067796 [2024-11-22 21:50:25,534 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 520 flow. Second operand 8 states and 301 transitions. [2024-11-22 21:50:25,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 193 transitions, 1453 flow [2024-11-22 21:50:25,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 193 transitions, 1451 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-22 21:50:25,734 INFO L231 Difference]: Finished difference. Result has 101 places, 86 transitions, 579 flow [2024-11-22 21:50:25,734 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=579, PETRI_PLACES=101, PETRI_TRANSITIONS=86} [2024-11-22 21:50:25,735 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 43 predicate places. [2024-11-22 21:50:25,735 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 86 transitions, 579 flow [2024-11-22 21:50:25,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.857142857142858) internal successors, (195), 7 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:25,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:25,735 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:25,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 21:50:25,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:25,936 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:25,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash -955928449, now seen corresponding path program 1 times [2024-11-22 21:50:25,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:25,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796256422] [2024-11-22 21:50:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 21:50:26,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:26,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796256422] [2024-11-22 21:50:26,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796256422] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:26,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236943153] [2024-11-22 21:50:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:26,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:26,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:26,260 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:26,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:50:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:26,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:50:26,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:26,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:26,617 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 7 treesize of output 5 [2024-11-22 21:50:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:26,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236943153] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:26,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:26,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 18 [2024-11-22 21:50:26,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798935190] [2024-11-22 21:50:26,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:26,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-22 21:50:26,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:26,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-22 21:50:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-11-22 21:50:27,142 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 59 [2024-11-22 21:50:27,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 86 transitions, 579 flow. Second operand has 20 states, 20 states have (on average 25.4) internal successors, (508), 20 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:27,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:27,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 59 [2024-11-22 21:50:27,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:29,516 INFO L124 PetriNetUnfolderBase]: 14326/21312 cut-off events. [2024-11-22 21:50:29,517 INFO L125 PetriNetUnfolderBase]: For 40170/40170 co-relation queries the response was YES. [2024-11-22 21:50:29,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73381 conditions, 21312 events. 14326/21312 cut-off events. For 40170/40170 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 131650 event pairs, 3090 based on Foata normal form. 388/20203 useless extension candidates. Maximal degree in co-relation 56264. Up to 4514 conditions per place. [2024-11-22 21:50:29,640 INFO L140 encePairwiseOnDemand]: 50/59 looper letters, 232 selfloop transitions, 28 changer transitions 0/268 dead transitions. [2024-11-22 21:50:29,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 268 transitions, 1935 flow [2024-11-22 21:50:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-22 21:50:29,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-22 21:50:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 500 transitions. [2024-11-22 21:50:29,642 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6053268765133172 [2024-11-22 21:50:29,642 INFO L175 Difference]: Start difference. First operand has 101 places, 86 transitions, 579 flow. Second operand 14 states and 500 transitions. [2024-11-22 21:50:29,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 268 transitions, 1935 flow [2024-11-22 21:50:29,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 268 transitions, 1888 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-22 21:50:29,904 INFO L231 Difference]: Finished difference. Result has 113 places, 97 transitions, 721 flow [2024-11-22 21:50:29,904 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=721, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2024-11-22 21:50:29,904 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 55 predicate places. [2024-11-22 21:50:29,904 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 721 flow [2024-11-22 21:50:29,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 25.4) internal successors, (508), 20 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:29,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:29,905 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:50:29,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 21:50:30,105 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,SelfDestructingSolverStorable15 [2024-11-22 21:50:30,105 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:30,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:30,106 INFO L85 PathProgramCache]: Analyzing trace with hash 386144350, now seen corresponding path program 1 times [2024-11-22 21:50:30,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:30,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625409066] [2024-11-22 21:50:30,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:30,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:50:30,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:30,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625409066] [2024-11-22 21:50:30,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625409066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:50:30,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:50:30,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:50:30,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692257317] [2024-11-22 21:50:30,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:30,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:50:30,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:30,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:50:30,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:50:30,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:50:30,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 721 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:30,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:30,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:50:30,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:32,089 INFO L124 PetriNetUnfolderBase]: 12938/19584 cut-off events. [2024-11-22 21:50:32,089 INFO L125 PetriNetUnfolderBase]: For 56424/56833 co-relation queries the response was YES. [2024-11-22 21:50:32,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71446 conditions, 19584 events. 12938/19584 cut-off events. For 56424/56833 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 125597 event pairs, 2446 based on Foata normal form. 37/17815 useless extension candidates. Maximal degree in co-relation 52907. Up to 14292 conditions per place. [2024-11-22 21:50:32,201 INFO L140 encePairwiseOnDemand]: 54/59 looper letters, 100 selfloop transitions, 9 changer transitions 8/134 dead transitions. [2024-11-22 21:50:32,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 134 transitions, 1208 flow [2024-11-22 21:50:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:50:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:50:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2024-11-22 21:50:32,202 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7740112994350282 [2024-11-22 21:50:32,202 INFO L175 Difference]: Start difference. First operand has 113 places, 97 transitions, 721 flow. Second operand 3 states and 137 transitions. [2024-11-22 21:50:32,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 134 transitions, 1208 flow [2024-11-22 21:50:32,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 134 transitions, 1149 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-11-22 21:50:32,329 INFO L231 Difference]: Finished difference. Result has 107 places, 97 transitions, 698 flow [2024-11-22 21:50:32,329 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=698, PETRI_PLACES=107, PETRI_TRANSITIONS=97} [2024-11-22 21:50:32,329 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 49 predicate places. [2024-11-22 21:50:32,330 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 97 transitions, 698 flow [2024-11-22 21:50:32,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:32,330 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:32,330 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] [2024-11-22 21:50:32,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:50:32,330 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:32,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:32,330 INFO L85 PathProgramCache]: Analyzing trace with hash 849522651, now seen corresponding path program 1 times [2024-11-22 21:50:32,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:32,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194062804] [2024-11-22 21:50:32,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:32,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:32,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:32,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:32,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:32,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194062804] [2024-11-22 21:50:32,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194062804] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:32,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499520179] [2024-11-22 21:50:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:50:32,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:32,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:32,446 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:32,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:50:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:50:32,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:50:32,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:32,761 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:32,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499520179] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:32,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:50:32,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 16 [2024-11-22 21:50:32,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921273427] [2024-11-22 21:50:32,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:32,829 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:50:32,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:32,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:50:32,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:50:32,860 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:50:32,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 97 transitions, 698 flow. Second operand has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:32,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:32,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:50:32,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:34,614 INFO L124 PetriNetUnfolderBase]: 11250/18406 cut-off events. [2024-11-22 21:50:34,615 INFO L125 PetriNetUnfolderBase]: For 50519/50535 co-relation queries the response was YES. [2024-11-22 21:50:34,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65463 conditions, 18406 events. 11250/18406 cut-off events. For 50519/50535 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 134932 event pairs, 2860 based on Foata normal form. 0/16439 useless extension candidates. Maximal degree in co-relation 47526. Up to 6468 conditions per place. [2024-11-22 21:50:34,739 INFO L140 encePairwiseOnDemand]: 49/59 looper letters, 207 selfloop transitions, 37 changer transitions 0/261 dead transitions. [2024-11-22 21:50:34,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 261 transitions, 2306 flow [2024-11-22 21:50:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:50:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:50:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 381 transitions. [2024-11-22 21:50:34,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6457627118644068 [2024-11-22 21:50:34,740 INFO L175 Difference]: Start difference. First operand has 107 places, 97 transitions, 698 flow. Second operand 10 states and 381 transitions. [2024-11-22 21:50:34,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 261 transitions, 2306 flow [2024-11-22 21:50:34,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 261 transitions, 2157 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-11-22 21:50:35,001 INFO L231 Difference]: Finished difference. Result has 106 places, 118 transitions, 911 flow [2024-11-22 21:50:35,001 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=911, PETRI_PLACES=106, PETRI_TRANSITIONS=118} [2024-11-22 21:50:35,001 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 48 predicate places. [2024-11-22 21:50:35,002 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 118 transitions, 911 flow [2024-11-22 21:50:35,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:35,002 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:35,002 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] [2024-11-22 21:50:35,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-22 21:50:35,202 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,SelfDestructingSolverStorable17 [2024-11-22 21:50:35,202 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:35,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:35,203 INFO L85 PathProgramCache]: Analyzing trace with hash 362083221, now seen corresponding path program 2 times [2024-11-22 21:50:35,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:35,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044874566] [2024-11-22 21:50:35,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:50:35,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:35,218 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:50:35,218 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:35,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:50:35,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:35,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044874566] [2024-11-22 21:50:35,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044874566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:35,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37794422] [2024-11-22 21:50:35,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:50:35,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:35,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:35,307 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:35,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:50:35,385 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:50:35,385 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:35,387 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:50:35,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:35,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:35,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37794422] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:35,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:35,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2024-11-22 21:50:35,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430740017] [2024-11-22 21:50:35,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:35,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-22 21:50:35,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:35,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-22 21:50:35,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:50:35,652 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:50:35,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 118 transitions, 911 flow. Second operand has 16 states, 16 states have (on average 31.0) internal successors, (496), 16 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:35,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:35,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:50:35,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:38,238 INFO L124 PetriNetUnfolderBase]: 15105/24415 cut-off events. [2024-11-22 21:50:38,239 INFO L125 PetriNetUnfolderBase]: For 76965/77126 co-relation queries the response was YES. [2024-11-22 21:50:38,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84258 conditions, 24415 events. 15105/24415 cut-off events. For 76965/77126 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 179768 event pairs, 1414 based on Foata normal form. 1278/24019 useless extension candidates. Maximal degree in co-relation 84214. Up to 5188 conditions per place. [2024-11-22 21:50:38,610 INFO L140 encePairwiseOnDemand]: 44/59 looper letters, 287 selfloop transitions, 268 changer transitions 0/572 dead transitions. [2024-11-22 21:50:38,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 572 transitions, 5510 flow [2024-11-22 21:50:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-22 21:50:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-22 21:50:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 864 transitions. [2024-11-22 21:50:38,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.636698599852616 [2024-11-22 21:50:38,613 INFO L175 Difference]: Start difference. First operand has 106 places, 118 transitions, 911 flow. Second operand 23 states and 864 transitions. [2024-11-22 21:50:38,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 572 transitions, 5510 flow [2024-11-22 21:50:38,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 572 transitions, 5447 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-22 21:50:38,854 INFO L231 Difference]: Finished difference. Result has 136 places, 339 transitions, 4045 flow [2024-11-22 21:50:38,855 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=862, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4045, PETRI_PLACES=136, PETRI_TRANSITIONS=339} [2024-11-22 21:50:38,855 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 78 predicate places. [2024-11-22 21:50:38,855 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 339 transitions, 4045 flow [2024-11-22 21:50:38,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 31.0) internal successors, (496), 16 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:38,856 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:38,856 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] [2024-11-22 21:50:38,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 21:50:39,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:39,057 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:39,057 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:39,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1781056745, now seen corresponding path program 3 times [2024-11-22 21:50:39,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:39,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096824735] [2024-11-22 21:50:39,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:50:39,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:39,069 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:50:39,069 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:50:39,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:39,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096824735] [2024-11-22 21:50:39,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096824735] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:39,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876911727] [2024-11-22 21:50:39,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:50:39,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:39,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:39,138 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:39,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:50:39,214 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:50:39,214 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:39,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:50:39,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:50:39,281 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:50:39,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876911727] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:50:39,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:50:39,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-11-22 21:50:39,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605137284] [2024-11-22 21:50:39,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:50:39,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:50:39,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:39,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:50:39,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:50:39,459 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:50:39,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 339 transitions, 4045 flow. Second operand has 13 states, 13 states have (on average 30.76923076923077) internal successors, (400), 13 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:39,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:39,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:50:39,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:45,071 INFO L124 PetriNetUnfolderBase]: 26920/42746 cut-off events. [2024-11-22 21:50:45,071 INFO L125 PetriNetUnfolderBase]: For 255889/256729 co-relation queries the response was YES. [2024-11-22 21:50:45,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176314 conditions, 42746 events. 26920/42746 cut-off events. For 255889/256729 co-relation queries the response was YES. Maximal size of possible extension queue 1605. Compared 334619 event pairs, 1248 based on Foata normal form. 220/39682 useless extension candidates. Maximal degree in co-relation 176257. Up to 9836 conditions per place. [2024-11-22 21:50:45,683 INFO L140 encePairwiseOnDemand]: 46/59 looper letters, 677 selfloop transitions, 1054 changer transitions 0/1748 dead transitions. [2024-11-22 21:50:45,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 1748 transitions, 23671 flow [2024-11-22 21:50:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-22 21:50:45,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-22 21:50:45,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 1596 transitions. [2024-11-22 21:50:45,685 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6440677966101694 [2024-11-22 21:50:45,685 INFO L175 Difference]: Start difference. First operand has 136 places, 339 transitions, 4045 flow. Second operand 42 states and 1596 transitions. [2024-11-22 21:50:45,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 1748 transitions, 23671 flow [2024-11-22 21:50:47,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 1748 transitions, 23359 flow, removed 152 selfloop flow, removed 4 redundant places. [2024-11-22 21:50:47,567 INFO L231 Difference]: Finished difference. Result has 196 places, 1335 transitions, 20811 flow [2024-11-22 21:50:47,568 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=3985, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=20811, PETRI_PLACES=196, PETRI_TRANSITIONS=1335} [2024-11-22 21:50:47,568 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 138 predicate places. [2024-11-22 21:50:47,568 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 1335 transitions, 20811 flow [2024-11-22 21:50:47,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 30.76923076923077) internal successors, (400), 13 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:47,568 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:50:47,569 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] [2024-11-22 21:50:47,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 21:50:47,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:47,769 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:50:47,770 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:50:47,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1193077253, now seen corresponding path program 4 times [2024-11-22 21:50:47,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:50:47,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119656292] [2024-11-22 21:50:47,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:50:47,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:50:47,781 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:50:47,781 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:47,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:50:47,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119656292] [2024-11-22 21:50:47,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119656292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:47,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502093105] [2024-11-22 21:50:47,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:50:47,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:50:47,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:50:47,982 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:50:47,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:50:48,060 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:50:48,061 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:50:48,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:50:48,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:50:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:48,175 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:50:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:50:48,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502093105] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:50:48,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:50:48,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2024-11-22 21:50:48,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649513207] [2024-11-22 21:50:48,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:50:48,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:50:48,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:50:48,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:50:48,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-11-22 21:50:48,308 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:50:48,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 1335 transitions, 20811 flow. Second operand has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:50:48,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:50:48,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:50:48,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:50:56,718 INFO L124 PetriNetUnfolderBase]: 27745/43385 cut-off events. [2024-11-22 21:50:56,719 INFO L125 PetriNetUnfolderBase]: For 367223/368265 co-relation queries the response was YES. [2024-11-22 21:50:57,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210523 conditions, 43385 events. 27745/43385 cut-off events. For 367223/368265 co-relation queries the response was YES. Maximal size of possible extension queue 1635. Compared 334568 event pairs, 3696 based on Foata normal form. 264/41381 useless extension candidates. Maximal degree in co-relation 210446. Up to 10615 conditions per place. [2024-11-22 21:50:57,218 INFO L140 encePairwiseOnDemand]: 47/59 looper letters, 620 selfloop transitions, 910 changer transitions 0/1547 dead transitions. [2024-11-22 21:50:57,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 1547 transitions, 26117 flow [2024-11-22 21:50:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:50:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:50:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 388 transitions. [2024-11-22 21:50:57,220 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6576271186440678 [2024-11-22 21:50:57,220 INFO L175 Difference]: Start difference. First operand has 196 places, 1335 transitions, 20811 flow. Second operand 10 states and 388 transitions. [2024-11-22 21:50:57,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 1547 transitions, 26117 flow [2024-11-22 21:51:01,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 1547 transitions, 25225 flow, removed 333 selfloop flow, removed 2 redundant places. [2024-11-22 21:51:02,012 INFO L231 Difference]: Finished difference. Result has 207 places, 1392 transitions, 23835 flow [2024-11-22 21:51:02,012 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=59, PETRI_DIFFERENCE_MINUEND_FLOW=20043, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=853, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23835, PETRI_PLACES=207, PETRI_TRANSITIONS=1392} [2024-11-22 21:51:02,013 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 149 predicate places. [2024-11-22 21:51:02,013 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 1392 transitions, 23835 flow [2024-11-22 21:51:02,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:02,013 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:51:02,013 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] [2024-11-22 21:51:02,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 21:51:02,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-22 21:51:02,214 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-22 21:51:02,214 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:51:02,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1876051587, now seen corresponding path program 5 times [2024-11-22 21:51:02,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:51:02,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896878394] [2024-11-22 21:51:02,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:51:02,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:51:02,230 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 21:51:02,231 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:02,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:51:02,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896878394] [2024-11-22 21:51:02,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896878394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:51:02,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951409] [2024-11-22 21:51:02,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:51:02,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:51:02,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:51:02,302 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:51:02,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:51:02,375 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-22 21:51:02,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:51:02,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:51:02,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:51:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:02,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:51:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:51:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951409] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:51:02,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:51:02,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-22 21:51:02,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281178776] [2024-11-22 21:51:02,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:51:02,479 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:51:02,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:51:02,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:51:02,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:51:02,608 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 59 [2024-11-22 21:51:02,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 1392 transitions, 23835 flow. Second operand has 13 states, 13 states have (on average 30.46153846153846) internal successors, (396), 13 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:51:02,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:51:02,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 59 [2024-11-22 21:51:02,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand